ltc5576 - 3ghz to 8ghz high linearity active upconverting ... · lead free finish tape and reel...
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LTC5576
15576f
For more information www.linear.com/LTC5576
Typical applicaTion
FeaTures DescripTion
3GHz to 8GHz High Linearity Active Upconverting Mixer
The LTC®5576 is a high linearity active mixer optimized for upconverting applications requiring wide input bandwidth, low distortion and low LO leakage. The integrated output transformer is optimized for 4GHz to 6GHz applications, but is easily retuned for output frequencies as low as 3GHz, or as high as 8GHz, with minor performance degradation. The input is optimized for use with 1:1 transmission-line baluns, allowing very wideband impedance matching.
The LO input port is single-ended and requires only 0dBm of LO power to achieve excellent distortion and noise per-formance while also reducing circuit requirements. The LTC5576 offers low LO leakage, reducing the demands of output filtering to meet LO suppression requirements.
The LTC5576 is optimized for 5V but can also be used with a 3.3V supply with slightly reduced performance. The enable function allows the part to be easily shut down for further power savings.
applicaTions
n 25dBm OIP3 n –0.6dB Conversion Gain n 14.1dB Noise Figure at 5.8GHz n –154dBm/Hz Output Noise Floor n Low LO-RF Leakage n 0dBm LO Drive n Broadband 50Ω Matched Input n High Input P1dB: 10dBm at 5V n 5V or 3.3V Supply at 99mA n Single-Ended Output and LO Input n Enable Pin n –40°C to 105°C Operation (TC) n 16-Lead (4mm × 4mm) QFN Package
n Wideband Transmitters n 4G and 5G Wireless Infrastructure n Fixed Wireless Access Equipment n Wireless Repeaters
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
IN50Ω
OUT50Ω
LO50Ω
LO
EN
EN
VCC IADJ
OUT
2.61k
TC1-1-13M1:1
100pF
BIAS
10nF
100pFIN+
IN–
LGND
TEMPTEMPERATUREMONITOR
5576 TA01a
1µF5V
0.2pF
100pF 0.3pF
OUTPUT FREQUENCY (MHz)3000
OIP3
(dBm
)
30
20
25
15
5
10
GAIN (dB)
15
5
10
0
–10
–5
5576 TA01b
80004000 5000 6000 7000
fIN = 456MHz fIN = 900MHz
TC = 25°C, OUTPUT TUNED FOR EACH BAND
OIP3GC
OIP3 and Conversion Gain vs Output Frequency (LSLO)
LTC5576
25576f
For more information www.linear.com/LTC5576
pin conFiguraTionabsoluTe MaxiMuM raTings
Supply Voltage (VCC) ..................................................6VEnable Voltage .................................–0.3V to VCC + 0.3VIADJ Pin Voltage ..........................................–0.3 to 2.7VLO Input Power (1GHz to 8GHz) ......................... +10dBmIN+, IN– Input Power (30MHz to 6GHz) .............. +15dBmTEMP Input Current ...............................................10mAOperating Temperature Range (TC) ........ –40°C to 105°CJunction Temperature (TJ) .................................... 150°CStorage Temperature Range .................. –65°C to 150°C
(Note 1)
16 15 14 13
5 6 7 8
TOP VIEW
17
UF PACKAGE16-LEAD (4mm × 4mm) PLASTIC QFN
9
10
11
12
4
3
2
1TEMP
IN+
IN–
LGND
GND
GND
OUT
GND
TP LO GND
GND
EN V CC
V CC
IADJ
TJMAX = 150°C, θJC = 6°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTionLEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION CASE TEMPERATURE RANGE
LTC5576IUF#PBF LTC5576IUF#TRPBF 5576 16-Lead (4mm × 4mm) Plastic QFN –40°C to 105°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on nonstandard lead based finish parts.For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Dc elecTrical characTerisTicsPARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage (VCC) 5V Supply 3.3V Supply
l
l
4.5 3.1
5 3.3
5.3 3.5
V V
Supply Current 5V, R1 = 2.61kΩ 3.3V, R1 = 649Ω Shutdown (EN = Low)
99 85 1.3
112 mA mA mA
Enable Logic Input (EN)
EN Input High Voltage (On) 1.8 V
EN Input Low Voltage (Off) 0.5 V
EN Input Current –0.3V to VCC + 0.3V –20 200 µA
Turn-On Time 0.6 µs
Turn-Off Time 0.6 µs
Current Adjust Pin (IADJ)
Open Circuit DC Voltage 1.8 V
Short Circuit DC Current 1.9 mA
Temperature Sensing Diode (TEMP)
DC Voltage at TJ = 25°C IIN = 10μA IIN = 80μA
697 755
mV mV
Voltage Temperature Coefficient IIN = 10μA IIN = 80μA
–1.80 –1.61
mV/°C mV/°C
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C, VCC = 5V. Test circuit shown in Figure 1. (Note 2)
LTC5576
35576f
For more information www.linear.com/LTC5576
ac elecTrical characTerisTics
ac elecTrical characTerisTics
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C. VCC = 5V, EN = High, PLO = 0dBm. Test circuit shown in Figure 1. (Notes 2, 3)
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C. VCC = 5V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3 and 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
LO Input Frequency Range External Matching Required l 1 to 8 GHz
Input (IN) Frequency Range External Matching Required l 0.03 to 6 GHz
Output (OUT) Frequency Range External Matching Required l 3 to 8 GHz
Input Return Loss ZO = 50Ω >10 dB
LO Input Return Loss ZO = 50Ω >10 dB
LO Input Power Single-Ended l –6 0 6 dBm
LO to IN Leakage fLO = 1GHz to 8GHz ≤–30 dBm
IN to LO Isolation fIN = 0.1GHz to 6GHz >35 dB
5V Upmixer Application: Low Side LO, PLO, = 0dBm, PIN = –10dBm
PARAMETER CONDITIONS MIN TYP MAX UNITS
Conversion Gain fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
–1.5
–0.6 –0.6 –2.0
0.7
dB dB dB
Conversion Gain vs Temperature TC = –40°C to 105°C, fOUT = 5.8GHz l –0.009 dB/°C
Output 3rd Order Intercept fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
25 25 25
dBm dBm dBm
SSB Noise Figure fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
12.4 14.1 17.5
dB dB dB
SSB Noise Floor at PIN = 5dBm fIN = 1GHz, fOUT = 5801MHz, fLO = 4899MHz –154 dBm/Hz
Input 1dB Compression fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
10.8 10.4 10.3
dBm dBm dBm
LO-OUT Leakage fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
–36 –35 –28
dBm dBm dBm
IN to OUT Isolation fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
70 38 35
dB dB dB
LTC5576
45576f
For more information www.linear.com/LTC5576
ac elecTrical characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.Note 2: The LTC5576 is guaranteed functional over the –40°C to 105°C case temperature range.
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3 and 4)
3.3V Upmixer Application: Low Side LO, PLO, = 0dBm, PIN = –10dBm
PARAMETER CONDITIONS MIN TYP MAX UNITS
Conversion Gain fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
–0.6 –0.6 –2.0
dB dB dB
Conversion Gain vs Temperature TC = –40°C to 105°C, fOUT = 5.8 GHz l –0.009 dB/°C
Output 3rd Order Intercept fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
21 23 19
dBm dBm dBm
SSB Noise Figure fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
11.5 12.8 17.8
dB dB dB
SSB Noise Floor at PIN = 5dBm fIN = 1GHz, fOUT = 5801MHz, fLO = 4899MHz –154 dBm/Hz
Input 1dB Compression fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO =4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
8.4 8.5 8.1
dBm dBm dBm
LO-OUT Leakage fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
–39 –36 –27
dBm dBm dBm
IN to OUT Isolation fIN = 456MHz, fOUT = 3.5GHz, fLO = 3.044GHz fIN = 900MHz, fOUT = 5.8GHz, fLO = 4.9GHz fIN = 900MHz, fOUT = 8GHz, fLO = 7.1GHz
70 38 33
dB dB dB
Note 3: SSB noise figure measured with a small-signal noise source, bandpass filter and 3dB matching pad on IN port, and bandpass filter on the LO input.Note 4: Specified performance includes all external component and evaluation PCB losses.
LTC5576
55576f
For more information www.linear.com/LTC5576
Typical Dc perForMance characTerisTics
Typical ac perForMance characTerisTics
Conversion Gain Distribution OIP3 Distribution Noise Figure Distribution
5V Supply Current vs Supply Voltage
3.3V Supply Current vs Supply Voltage
(Test Circuit shown in Figure 1)
5V, 5800MHz Output Frequency: TC = 25°C. VCC = 5V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, fIN = 900MHz, unless otherwise noted. Test circuit shown in Figure 1.
SUPPLY VOLTAGE (V)4.5
SUPP
LY C
URRE
NT (m
A)
110
100
95
105
90
85
80
75
70
5576 G01
5.34.94.7 5.1
R1 = 2.61k
TC = 105°C85°C25°C–40°C
GAIN (dB)–1.5
DIST
RIBU
TION
(%)
35
25
20
30
15
10
5
0
5576 G03
1.5–1 –0.5 0
TC = 105°CTC = 25°CTC = –40°C
OIP3 (dBm)18
DIST
RIBU
TION
(%)
25
20
15
10
5
0
5576 G04
3020 2422 26 28
TC = 105°CTC = 25°CTC = –40°C
NF (dB)12.5
DIST
RIBU
TION
(%)
25
20
30
15
10
5
0
5576 G05
15.513.5 14.5
TC = 105°CTC = 25°CTC = –40°C
SUPPLY VOLTAGE (V)3
SUPP
LY C
URRE
NT (m
A)
110
100
95
105
90
85
80
75
70
5576 G02
3.63.23.1 3.3 3.4 3.5
R1 = 649Ω TC = 105°C85°C25°C–40°C
LTC5576
65576f
For more information www.linear.com/LTC5576
Conversion Gain, OIP3 and NF vs LO Input Power Output Noise Floor vs Input Power
Conversion Gain, OIP3 and NF vs Supply Voltage
2-Tone IM3 Level vs Output Power Level
IN-OUT Isolation vs Input Frequency
Conversion Gain, OIP3, NF and IP1dB vs Case Temperature
Conversion Gain, OIP3 and NF vs Input Frequency
Conversion Gain and OIP3 vs Output Frequency LO Leakage vs LO Frequency
Typical ac perForMance characTerisTics 5V, 3500MHz Output Frequency: TC = 25°C. VCC = 5V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, fIN = 456MHz, fLO = fOUT – fIN, unless otherwise noted. Test circuit shown in Figure 1.
INPUT FREQUENCY (MHz)0
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
35
30
25
15
20
10
5
0
–5
5576 G06
30001000500 1500 2000 2500
OIP3
NF
TC = 105°C85°C25°C–40°CGC
OUTPUT FREQUENCY (MHz)3000
GAIN
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
0
–5
5576 G07
400034003200 3600 3800
OIP3
GC
TC = 105°C85°C25°C–40°C
LO FREQUENCY (MHz)500
LO L
EAKA
GE (d
Bm)
0
–10
–30
–20
–40
–50
–60
–70
–80
5576 G08
350015001000 2000 2500 3000
LO-IN
LO-OUT
TC = 25°C
LO POWER (dBm)–6
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
35
30
25
15
20
10
5
0
–5
5576 G09
6–2–4 0 2 4
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
INPUT POWER (dBm)–20
NOIS
E FL
OOR
(dBm
/Hz)
–150
–154
–152
–156
–158
–160
–162
5576 G10
5–10–15 –5 0
PLO = –6dBm–4dBm–2dBm0dBm6dBm
fOUT = 3663MHzfNOISE = 3581MHzfLO = 3201MHz
SUPPLY VOLTAGE (V)4.5
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
0
–5
5576 G11
5.34.74.6 4.8 4.9 5 5.1 5.2
GC
TC = 105°C85°C25°C–40°C
NF
OIP3
OUTPUT POWER (dBm/TONE)–15
IM3
LEVE
L (d
Bc)
0
–10
–30
–20
–40
–50
–60
–70
–80
–90
5576 G12
5–10 –5 0
TC = 105°C85°C25°C–40°C
INPUT FREQUENCY (MHz)0
ISOL
ATIO
N (d
B)
100
80
90
60
70
50
40
30
20
10
0
5576 G13
30002000 2500500 1000 1500
TC = 105°C85°C25°C–40°C
CASE TEMPERATURE (°C)–45
GAIN
AND
NF
(dB)
, OIP
3 AN
D IP
1dB
(dBm
)
30
25
15
20
10
5
0
–5
5576 G14
105–15 15 45 75
GC
NF
IP1dB
OIP3
LTC5576
75576f
For more information www.linear.com/LTC5576
Conversion Gain, OIP3 and NF vs LO Input Power Output Noise Floor vs Input Power
Conversion Gain, OIP3 and NF vs Supply Voltage
2-Tone IM3 Level vs Output Power Level
IN-OUT Isolation vs Input Frequency
Conversion Gain, OIP3, NF and IP1dB vs Case Temperature
Conversion Gain, OIP3 and NF vs Input Frequency
Conversion Gain and OIP3 vs Output Frequency LO Leakage vs LO Frequency
Typical ac perForMance characTerisTics 5V, 5800MHz Output Frequency: TC = 25°C. VCC = 5V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, fIN = 900MHz, fLO = fOUT – fIN, unless otherwise noted. Test circuit shown in Figure 1.
INPUT FREQUENCY (MHz)0
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
35
30
25
15
20
10
5
0
–5
5576 G15
2400800400 1200 1600 2000
OIP3
NF
TC = 105°C85°C25°C–40°C
GC
OUTPUT FREQUENCY (MHz)4500
GAIN
(dB)
, OIP
3 (d
Bm)
35
30
25
15
20
10
5
0
–5
5576 G16
750055005000 6000 6500 7000
OIP3
TC = 105°C85°C25°C–40°C
GC
LO FREQUENCY (MHz)3300
LO L
EAKA
GE (d
Bm)
0
–10
–30
–20
–40
–50
–60
5576 G17
580043003800 4800 5300
LO-OUT
TC = 25°C
LO-IN
LO POWER (dBm)–6
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
35
30
25
15
20
10
5
0
–5
5576 G18
6–2–4 0 2 4
OIP3
NF
TC = 105°C85°C25°C–40°C
GC
INPUT POWER (dBm)–20
NOIS
E FL
OOR
(dBm
/Hz)
–150
–154
–152
–156
–158
–160
–162
5576 G19
5–10–15 –5 0
PLO = –6dBm–4dBm–2dBm0dBm6dBm
fOUT = 5899MHzfNOISE = 5801MHzfLO = 4899MHz
SUPPLY VOLTAGE (V)4.5
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
35
30
25
15
20
10
5
0
–5
5576 G20
5.34.74.6 4.8 4.9 5 5.1 5.2
OIP3
NF
TC = 105°C85°C25°C–40°C
GC
OUTPUT POWER (dBm/TONE)–15
IM3
LEVE
L (d
Bc)
0
–10
–30
–20
–40
–50
–60
–70
–80
–90
5576 G21
5–10 –5 0
TC = 105°C85°C25°C–40°C
INPUT FREQUENCY (MHz)0
ISOL
ATIO
N (d
B)
70
60
50
40
30
20
10
0
5576 G22
25001500 2000500 1000
TC = 105°C85°C25°C–40°C
CASE TEMPERATURE (°C)–45
GAIN
AND
NF
(dB)
, OIP
3 AN
D IP
1dB
(dBm
)
35
25
30
15
20
10
5
0
–5
5576 G23
105–15 15 45 75
GC
IP1dB
NF
OIP3
LTC5576
85576f
For more information www.linear.com/LTC5576
Typical ac perForMance characTerisTics 5V, 8000MHz Output Frequency: TC = 25°C. VCC = 5V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = –4dBm, fIN = 900MHz, fLO = fOUT – fIN, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain, OIP3 and NF vs LO Input Power Output Noise Floor vs Input Power
Conversion Gain, OIP3 and NF vs Supply Voltage
2-Tone IM3 Level vs Output Power Level
IN-OUT Isolation vs Input Frequency
Conversion Gain, OIP3, NF and IP1dB vs Case Temperature
Conversion Gain, OIP3 and NF vs Input Frequency
Conversion Gain and OIP3 vs Output Frequency LO Leakage vs LO Frequency
INPUT FREQUENCY (MHz)0
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
0
–5
5576 G24
2400800400 1200 1600 2000
TC = 105°C85°C25°C–40°C
OIP3
NF
GC
OUTPUT FREQUENCY (MHz)7400
GAIN
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
0
–5
5576 G25
860078007600 8000 8200 8400
TC = 105°C85°C25°C–40°C
OIP3
GC
LO FREQUENCY (MHz)5600
LO L
EAKA
GE (d
Bm)
0
–10
–30
–20
–40
–50
–60
5576 G26
800064006000 6800 7200 7600
LO-OUT
TC = 25°C
LO-IN
LO POWER (dBm)–6
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
0
–5
5576 G27
6–2–4 0 2 4
TC = 105°C85°C25°C–40°C
OIP3
NF
GC
INPUT POWER (dBm)–20
NOIS
E FL
OOR
(dBm
/Hz)
–148
–152
–150
–154
–156
–158
5576 G28
5–10–15 –5 0
PLO = –6dBm–4dBm–2dBm0dBm6dBm
fOUT = 8094MHzfNOISE = 7997MHzfLO = 7094MHz
SUPPLY VOLTAGE (V)4.5
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
0
–5
5576 G29
5.34.74.6 4.8 4.9 5 5.1 5.2
OIP3
TC = 105°C85°C25°C–40°C
NF
GC
OUTPUT POWER (dBm/TONE)–15
IM3
LEVE
L (d
Bc)
0
–10
–30
–20
–40
–50
–60
–70
–80
–90
5576 G30
5–10 –5 0
TC = 105°C85°C25°C–40°C
CASE TEMPERATURE (°C)–45
GAIN
AND
NF
(dB)
, OIP
3 AN
D IP
1dB
(dBm
)
25
30
15
20
10
5
0
–5
5576 G32
105–15 15 45 75
IP1dB
NF
OIP3
GC
INPUT FREQUENCY (MHz)0
ISOL
ATIO
N (d
B)
50
45
40
35
30
25
20
15
10
5
0
5576 G31
24001200 1600 2000400 800
TC = 105°C85°C25°C–40°C
LTC5576
95576f
For more information www.linear.com/LTC5576
Typical ac perForMance characTerisTics 3.3V, 3500MHz Output Frequency: TC = 25°C. VCC = 3.3V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, fIN = 456MHz, fLO = fOUT – fIN, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain, OIP3 and NF vs LO Input Power Output Noise Floor vs Input Power
Conversion Gain, OIP3 and NF vs Supply Voltage
2-Tone IM3 Level vs Output Power Level
IN-OUT Isolation vs Input Frequency
Conversion Gain, OIP3, NF and IP1dB vs Case Temperature
Conversion Gain, OIP3 and NF vs Input Frequency
Conversion Gain and OIP3 vs Output Frequency LO Leakage vs LO Frequency
INPUT FREQUENCY (MHz)0
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm) 25
30
15
20
10
5
0
–5
5576 G33
3000500 1000 1500 2000 2500
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
OUTPUT FREQUENCY (MHz)
GAIN
(dB)
, OIP
3 (d
Bm)
25
30
15
20
10
5
0
–5
5576 G34
40003000 3200 3400 3600 3800
OIP3
GC
TC = 105°C85°C25°C–40°C
LO FREQUENCY (MHz)
LO L
EAKA
GE (d
Bm) –20
0
–10
–40
–30
–50
–60
–70
–80
5576 G35
3500500 1000 1500 2000 2500 3000
TC = 25°C
LO-IN
LO-OUT
LO POWER (dBm)–6
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
25
15
20
10
5
0
–5
5576 G36
6–4 –2 0 2 4
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
INPUT POWER (dBm)–20
NOIS
E FL
OOR
(dBm
/Hz)
–152
–156
–154
–158
–160
–162
–164
5576 G37
5–15 –10 –5 0
PLO = –6dBm–4dBm–2dBm0dBm6dBm
fOUT = 3663MHzfNOISE = 3581MHzfLO = 3201MHz
INPUT FREQUENCY (MHz)0
ISOL
ATIO
N (d
B)
100
80
90
70
60
50
40
30
20
10
0
5576 G39
3000500 1500 2000 25001000
TC = 105°C85°C25°C–40°C
CASE TEMPERATURE (°C)–45
GAIN
AND
NF
(dB)
, OIP
3 AN
D IP
1dB
(dBm
)
25
15
20
10
5
0
–5
5576 G41
105–15 15 45 75
OIP3
GC
IP1dB
NF
SUPPLY VOLTAGE (V)3
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
25
15
20
10
5
0
–5
5576 G38
3.63.1 3.2 3.3 3.4 3.5
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
OUTPUT POWER (dBm/TONE)–15
IM3
LEVE
L (d
Bc)
0
–30
–10
–20
–40
–50
–60
–70
–80
–90
5576 G39
5–10 –5 0
TC = 105°C85°C25°C–40°C
LTC5576
105576f
For more information www.linear.com/LTC5576
Typical ac perForMance characTerisTics 3.3V, 5800MHz Output Frequency: TC = 25°C. VCC = 3.3V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = 0dBm, fIN = 900MHz, fLO = fOUT – fIN, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain, OIP3 and NF vs LO Input Power Output Noise Floor vs Input Power
Conversion Gain, OIP3 and NF vs Supply Voltage
2-Tone IM3 Level vs Output Power Level
IN-OUT Isolation vs Input Frequency
Conversion Gain, OIP3, NF and IP1dB vs Case Temperature
Conversion Gain, OIP3 and NF vs Input Frequency
Conversion Gain and OIP3 vs Output Frequency LO Leakage vs LO Frequency
INPUT FREQUENCY (MHz)0
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm) 25
30
15
20
10
5
0
–5
5576 G42
2400400 800 1200 1600 2000
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
OUTPUT FREQUENCY (MHz)
GAIN
(dB)
, OIP
3 (d
Bm)
25
30
15
20
10
5
0
–5
5576 G43
75004500 5000 5500 6000 6500 7000
OIP3
GC
TC = 105°C85°C25°C–40°C
LO FREQUENCY (MHz)
LO L
EAKA
GE (d
Bm)
0
–10
–30
–20
–40
–50
–60
5576 G44
58003300 3800 4300 4800 5300
TC = 25°C
LO-IN
LO-OUT
LO POWER (dBm)–6
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
30
15
20
25
10
5
0
–5
5576 G45
6–4 –2 0 2 4
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
INPUT POWER (dBm)–20
NOIS
E FL
OOR
(dBm
/Hz)
–150
–154
–152
–156
–158
–160
–162
5576 G46
5–15 –10 –5 0
PLO = –6dBm–4dBm–2dBm0dBm6dBm
fOUT = 5899MHzfNOISE = 5801MHzfLO = 4899MHz
SUPPLY VOLTAGE (V)3
GAIN
AND
NF
(dB)
, OIP
3 (d
Bm)
30
15
20
25
10
5
0
–5
5576 G47
3.63.1 3.2 3.3 3.4 3.5
OIP3
GC
TC = 105°C85°C25°C–40°C
NF
OUTPUT POWER (dBm/TONE)–15
IM3
LEVE
L (d
Bc)
0
–20
–10
–30
–40
–50
–60
–70
–80
–90
5576 G48
5–10 –5 0
TC = 105°C85°C25°C–40°C
INPUT FREQUENCY (MHz)0
ISOL
ATIO
N (d
B)
70
60
50
40
30
20
10
0
5576 G49
500 1500 2000 25001000
TC = 105°C85°C25°C–40°C
CASE TEMPERATURE (°C)–45
GAIN
AND
NF
(dB)
, OIP
3 AN
D IP
1dB
(dBm
)
30
25
15
20
10
5
0
–5
5576 G50
105–15 15 45 75
OIP3
GC
IP1dB
NF
LTC5576
115576f
For more information www.linear.com/LTC5576
Typical ac perForMance characTerisTics 3.3V, 8000MHz Output Frequency: TC = 25°C. VCC = 3.3V, EN = High, PIN = –10dBm (–10dBm/Tone for 2-tone tests, ∆f = 2MHz), PLO = –4dBm, fIN = 900MHz, fLO = fOUT – fIN, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain, OIP3 and NF vs LO Input Power Output Noise Floor vs Input Power
Conversion Gain, OIP3 and NF vs Supply Voltage
2-Tone IM3 Level vs Output Power Level
IN-OUT Isolation vs Input Frequency
Conversion Gain, OIP3, NF and IP1dB vs Case Temperature
Conversion Gain, OIP3 and NF vs Input Frequency
Conversion Gain and OIP3 vs Output Frequency LO Leakage vs LO Frequency
INPUT FREQUENCY (MHz)0
GAIN
(dB)
, OIP
3 (d
Bm) NOISE FIGURE (dB)
25
15
20
10
5
0
–5
30
20
25
15
10
5
0
5576 G51
2400400 800 1200 1600 2000
OIP3
TC = 105°C85°C25°C–40°C
NF
GC
OUTPUT FREQUENCY (MHz)
GAIN
(dB)
, OIP
3 (d
Bm)
25
15
20
10
5
0
–5
5576 G52
86007400 7600 7800 8000 8200 8400
OIP3
GC
TC = 105°C85°C25°C–40°C
LO FREQUENCY (MHz)
LO L
EAKA
GE (d
Bm)
0
–10
–30
–20
–40
–50
–60
5576 G53
80005600 6000 6400 6800 7200 7600
LO-IN
LO-OUT
TC = 25°C
LO POWER (dBm)–10
GAIN
(dB)
, OIP
3 (d
Bm) NOISE FIGURE (dB)
15
20
25
10
5
0
–5
20
25
30
15
10
5
0
5576 G54
2–8 –6 –4 –2 0
OIP3
TC = 105°C85°C25°C–40°C
NF
GC
INPUT POWER (dBm)–20
NOIS
E FL
OOR
(dBm
/Hz)
–148
–152
–150
–154
–156
–158
5576 G55
5–15 –10 –5 0
PLO = –6dBm–4dBm–2dBm0dBm6dBm
fOUT = 8094MHzfNOISE = 7997MHzfLO = 7094MHz
SUPPLY VOLTAGE (V)3
GAIN
(dB)
, OIP
3 (d
Bm)
15
20
25
10
5
0
–5
NOISE FIGURE (dB)
20
25
30
15
10
5
0
5576 G56
3.63.1 3.2 3.3 3.4 3.5
OIP3
TC = 105°C85°C25°C–40°CGC
NF
OUTPUT POWER (dBm/TONE)–15
IM3
LEVE
L (d
Bc)
0
–20
–10
–30
–40
–50
–60
–70
–80
–90
5576 G57
5–10 –5 0
TC = 105°C85°C25°C–40°C
INPUT FREQUENCY (MHz)0
ISOL
ATIO
N (d
B)
50
45
40
35
30
25
20
15
10
5
0
5576 G58
400 1200 1600 2000 2400800
TC = 105°C85°C25°C–40°C
CASE TEMPERATURE (°C)–45
GAIN
AND
NF
(dB)
, OIP
3 AN
D IP
1dB
(dBm
)
25
15
20
10
5
0
–5
5576 G59
105–15 15 45 75
GC
NF
OIP3
IP1dB
LTC5576
125576f
For more information www.linear.com/LTC5576
pin FuncTionsTEMP (Pin 1): Temperature Monitor. This pin is connected to the anode of a diode through a 30Ω resistor. It may be used to measure the die temperature by forcing a current into the pin and measuring the resulting pin voltage.
IN+, IN– (Pins 2, 3): Differential Signal Input. For optimum performance these pins should be driven with a differential signal. The input can be driven single-ended with some performance degradation by connecting the unused pin to RF ground through a capacitor. An internally generated 1.6V DC bias voltage is present on these pins, thus DC blocking is required.
LGND (Pin 4): DC Ground Return for the Input Amplifier. This pin must be connected to a good DC and RF ground. The typical current from this pin is 64mA. In some ap-plications, an external chip inductor may be used, though any DC resistance will reduce current in the mixer core, which could affect performance.
EN (Pin 5): Enable Pin. The IC is enabled when the applied voltage on this pin is greater than 1.8V. An applied voltage less than 0.5V will disable the IC. An internal 300k resistor pulls this pin low if it is left floating.
VCC (Pins 6, 7): Power Supply Pin: These pins should be connected together on the circuit board and bypassed with
a 10nF capacitor located close to the IC. (See the Auto Supply Voltage Detection and Supply Voltage Ramping sections for additional information).
IADJ (Pin 8): Bias Current Adjust Pin: This pin allows adjustment of the internal mixer current by adding an external pull-down resistor. The typical DC voltage on this pin is 1.8V. If not used, this pin must be left floating.
GND (Pins 9, 11, 12, 13, 14, 17 (Exposed Pad)): Ground. These pins must be soldered to the RF ground plane on the circuit board. The exposed pad on the package provides both electrical contact to the ground and a good thermal contact to the printed circuit board.
OUT (Pin 10): Single-Ended Output Pin. This pin is con-nected internally to a single-ended transformer output. A DC voltage should not be applied to this pin. External components may be needed for impedance matching.
LO (Pin 15): Single-Ended LO Input. This pin is impedance matched over a broad frequency range. It is internally biased at 1.7V, thus a DC blocking capacitor is required.
TP (Pin 16): Test Pin: This pin is used for production test purposes only and must be connected to ground.
block DiagraM
LOTP GNDGNDEXPOSEDPAD
GND
DOUBLE-BALANCED
MIXER
LINEARAMP
LOAMP
IN+
IN–
LGND
EN VCC IADJ
GND
OUT
VCC
TEMP
5576 BD01
1
2
17 16 15 14 13
3
4
12
11
10
9
5 6 7 8
BIAS
GND
GND
LTC5576
135576f
For more information www.linear.com/LTC5576
TesT circuiT
REF DES VALUE SIZE VENDOR
C1, C2 1000pF 0402 Murata GRM
C3 See Table 0402 Murata GJM
C4 100pF 0402 Murata GRM
C5 0.3pF 0402 AVX Accu-P
C6 See Table 0402 AVX Accu-P
C7 10nF 0402 Murata GRM
C8 1µF 0603 Murata GRM
L1 See Table 0402 Coilcraft HP
L2 0Ω 0402 Vishay
R1 See Table 0402 Vishay
T1 1:1, 4.5MHz to 3000MHz AT224-1 Mini-Circuits
Figure 1. Test Circuit Schematic
IN50Ω
LTC5576IN+C1
T11:1
C2
L2
C3
IN–
LGND
EN
EN
C7 C8
C6
VCC
VCC
IADJ
R1
GND
GND
OUT
VCC
TEMP
5576 TC01
1
2
3
4
12
11
10
9
5 6 7 8
OUT50Ω
GND
LOTP GND GND16 15 14 13
L1
C5
C4
LO50Ω
RF
0.016˝
0.016˝
0.062˝GND
BIASGND
DC2322AEVALUATION BOARDSTACK-UP(NELCO 4000-13EP)
OUTPUT FREQUENCY C3 C6 L1 R1 (5V) R1 (3.3V)
3500MHz 0.7pF 6.8nH (L) 0.5pF (C ) 2.61kΩ, 1% 511Ω, 1%
5800MHz - 0.2pF 0Ω 2.61kΩ, 1% 649Ω, 1%
8000MHz - 0.2pF 1nH 2.61kΩ, 1% 649Ω, 1%
LTC5576
145576f
For more information www.linear.com/LTC5576
Introduction
The LTC5576 uses a high performance LO buffer amplifier driving a double-balanced mixer core to achieve frequency conversion with high linearity. A differential common-emitter stage at the mixer input allows very broad band matching of the input. The Block Diagram and Pin Func-tions sections provide additional details. The LTC5576 is primarily intended for upmixer applications, however, due to its broadband input capability, it could be used as a downmixer as well.
The test circuit schematic in Figure 1 shows the external component values used for the IC characterization. The evaluation board layout is shown in Figure 2. Additional components may be used to optimize performance for different applications.
The single-ended LO port is impedance matched over a very broad frequency range for ease of use. Low side or high side LO injection can be used, though the value of R1 may need to be adjusted accordingly for best performance. The IC includes an internal RF balun at the mixer output, thus the OUT port is single-ended. External components are required to optimize the impedance match for the desired frequency range.
applicaTions inForMaTionIN Port
A simplified schematic of the mixer’s input path is shown in Figure 3. The IN+ and IN– pins drive the bases of the input transistors while internal R-C networks are used for impedance matching. The input pins are internally biased to a common-mode voltage of 1.6V, thus external DC block-ing capacitors, C1 and C2 are required. A small value of C3 can be used to extend the impedance match to higher frequencies. The 1:1 transformer provides single-ended to differential signal conversion for optimum performance.
Single-ended operation is possible by driving one input pin and connecting the unused input pin to RF ground through a capacitor. The performance will be degraded but may be acceptable at lower frequencies.
Figure 2. LTC5576 Evaluation Board Layout
Figure 3. IN Port with External Matching
IN
VCC
T1
1:1
5576 F03
C3
C2
VBIAS
LGND
VBIAS
LTC5576
C1IN+
IN–3
4
2
VCC VCC
5576 F02
LTC5576
155576f
For more information www.linear.com/LTC5576
applicaTions inForMaTionFigure 4 shows the typical return loss at the IN port of the evaluation board with C1 and C2 values of 1000pF. The curves illustrate that adding a C3 value of 0.7pF improves the return loss at higher frequencies.
Differential reflection coefficients and impedances for the IN port are listed vs frequency in Table 1.
Table 1. IN Port Differential Impedance vs Frequency
FREQUENCY (MHz)
IMPEDANCE (Ω) REFL. COEFF.
REAL* IMAG* MAG ANG (°)
0.2 823 –j3971 0.89 –1.4
1 751 –j800 0.88 –7.2
10 133 –j154 0.50 –41
30 78.1 –j248 0.25 –36
50 73.3 –j378 0.20 –27
100 71.3 –j665 0.18 –17
200 70.7 –j961 0.17 –12
500 70.0 –j832 0.17 –14
1000 67.9 –j509 0.16 –24
1200 66.7 –j439 0.16 –28
1500 64.6 –j367 0.15 –35
2000 60.4 –j302 0.13 –49
2200 58.5 –j289 0.12 –55
2500 55.5 –j280 0.11 –66
3000 50.6 –j303 0.08 –91
4000 42.9 –j7460 0.08 –178
5000 42.7 j155 0.17 126
6000 55.9 j89 0.29 96
*Parallel Equivalent Impedance
Figure 4. IN Port Return Loss
Figure 5. LO Port with External Matching
The tail current of the input amplifier stage flows through pin 4 (LGND). Typically, this pin should be connected directly to a good RF ground; however, at lower input frequencies, it may be beneficial to insert an inductor to ground for improved IP2 performance. To minimize the inductors effect on DC current, the inductor should have low DC resistance. The expected current from this pin is approximately 64mA and any DC resistance on this pin will reduce the current in the mixer core which could adversely impact performance. The value of R1 can be adjusted to account for L1's DC resistance.
LO Port
The LTC5576 uses a single-ended LO signal to drive an input of a bipolar differential amplifier, as shown in Figure 5. The diff-pair provides single-ended to differential conver-sion to drive the mixer core. Internal resistors provide a broad band impedance match of 50Ω that is maintained when the part is disabled. The LO pin is biased internally to 1.7V, thus an external DC blocking capacitor (C4) is required. Optional capacitor, C5, can be used to improve the return loss at higher frequencies if needed.
LO50Ω
VCC
5576 F05
LTC5576
C4
C5
LO50Ω
15
50Ω
15pF
FREQUENCY (MHz)0
RETU
RN L
OSS
(dB)
0
–10
–5
–15
–20
–25
5576 F04
40001000 2000 3000
T1 = TC1-1-13M+
C3 = 0pFC3 = 0.7pF
LTC5576
165576f
For more information www.linear.com/LTC5576
applicaTions inForMaTion
Figure 6. LO Port Return Loss
Measured return loss of the LO port is shown in Figure 6 for a C4 value of 100pF. Without C5, the return loss is bet-ter than 10dB from 100MHz to beyond 4GHz. The addition of 0.3pF at C5 extends the 10dB match to beyond 8GHz.
Figure 7. OUT Port with External Matching
External components C6 and L2 are used to optimize the impedance for the desired frequency range. High-Q com-ponents should be used here to minimize the impact on conversion gain. Table 2 lists the single-ended reflection coefficients and impedances of the OUT port and Table 3 lists component values for several application frequencies. In Figure 8, return loss is plotted for several of these values.
Table 2. OUT Port Impedance vs FrequencyFREQ (MHz)
IMPEDANCE (Ω) REFL COEFF
REAL* IMAG* MAG ANGLE
2500 12.8 51.8 0.78 86
3000 24.9 68.1 0.72 68
3500 50.7 80.7 0.63 51
4000 94.6 61.6 0.48 31
4500 89.5 4.7 0.29 5
5000 55.8 –8.0 0.09 –50
5500 38.7 –2.0 0.13 –169
6000 32.0 6.6 0.23 155
6500 30.6 16.5 0.31 128
7000 34.1 27.9 0.36 101
7500 41.2 39.4 0.41 79
8000 51.1 51.7 0.46 62
8500 62.5 57.7 0.47 51
*Series Impedance: Z = REAL + jIMAG
Table 3. Output Component ValuesFREQ (MHz)
12dB RL BAND (MHz)
VALUES
C6 L2
3000 2800 to 3200 Open 0.5pF (C)
3500 3360 to 3830 6.8nH (L) 0.5pF (C)
5000 4000 to 6700 3.3nH (L) 0.6pF (C)
5200 4700 to 5800 Open 0Ω
5800 4870 to 7040 0.2pF 0Ω
8000 7500 to 8700 0.2pF 1nHOUT50Ω
5576 F07
LTC5576
C6
L210
VCC
OUT
FREQUENCY (MHz)0
RETU
RN L
OSS
(dB)
0
–10
–5
–15
–20
–25
5576 F06
80002000 4000 6000
EN = ON
C5 = 0.3pF
EN = OFF
OUT Port
The LTC5576 uses an on-chip balun to provide a single-ended output, as shown in Figure 7. The output is opti-mized for 4GHz to 6GHz applications, but may be used for output frequencies as low as 3GHz, and as high as 8GHz.
LTC5576
175576f
For more information www.linear.com/LTC5576
Figure 10. Current Adjust Pin Interface
applicaTions inForMaTion
DC and RF Grounding
The LTC5576 relies on the backside ground of the package for both RF and thermal performance. The exposed pad must be soldered to the low impedance topside ground plane of the board. The topside ground should also be con-nected to other ground layers to aid in thermal dissipation and ensure a low inductance RF ground. The LTC5576 evaluation board (Figure 2) utilizes a four by four array of vias under the exposed pad for this purpose.
Enable Interface
Figure 9 shows a simplified schematic of the EN interface. To enable the part, the applied EN voltage must be greater than 1.8V. Setting the voltage to below 0.5V will disable the IC. If the enable function is not required, the enable pin can be connected directly to VCC. If the enable pin is left floating, an internal 300k pull-down resistor will disable the IC.
The voltage at the enable pin should never exceed the power supply voltage (VCC) by more than 0.3V, otherwise supply current may be sourced through the upper ESD diode. Under no circumstances should voltage be applied to the enable pin before the supply voltage is applied to the VCC pin. If this occurs, damage to the IC may result.
Figure 8. OUT Port Return Loss Tuned for (A) 3000MHz, (B) 3500MHz, (C) 5200MHz, (D) 5800MHz, (E) 8000MHz
Figure 9. EN Pin Interface
Current Adjust Pin (IADJ)
The IADJ pin (Pin 8) can be used to optimize the perfor-mance of the mixer. The nominal open-circuit DC voltage on this pin is 1.8V and the typical short-circuit current is 1.9mA. As shown in Figure 10, an internal 4mA reference sets the current in the mixer core. Connecting R1 to the IADJ pin shunts some of this current to ground, thus reducing the mixer core current. The optimum value of R1 depends on the supply voltage and LO injection (low side or high side). Some recommended values are shown in Table 4 but the values can be optimized as required for individual applications.
5576 F09
LTC5576
5
300k
50k
VCC
EN
5576 F10
LTC5576
R1
VCC
4mAIADJ 715Ω
8
BIAS
FREQUENCY (MHz)2500
RETU
RN L
OSS
(dB)
0
–10
–5
–15
–20
5576 F08
850055003500 4500 6500 7500
A
B
C
D
E
LTC5576
185576f
For more information www.linear.com/LTC5576
Figure 11. TEMP Pin Voltage vs Junction Temperature
applicaTions inForMaTionTable 4. Recommended R1 Values
VCC (V) fIN (MHz) fOUT (MHz) fLO (MHz) R1 (Ω)
3.3 456 3500 3044 511
3.3 900 5800 4900 649
3.3 900 8000 7100 649
5.0 456 3500 3044 2.61k
5.0 900 5800 4900 2.61k
5.0 1300 5000 6300 2.61K
Temperature Monitor Pin (TEMP)
The TEMP pin (pin 1) is connected to an on-chip diode that can be used as a coarse temperature monitor by forcing current into it and measuring the resulting voltage. The temperature diode is protected by a series 30Ω resistor and additional ESD diodes to ground. The TEMP pin voltage is shown as a function of junction temperature in Figure 11.
Given the voltage at the pin, VTEMP, (in mV) the junction temperature in °C can be estimated for forced input cur-rents of 10µA and 80µA using the following equations:
TJ(10µA) = (742.4 – VTEMP)/1.796
TJ(80µA) = (795.6 – VTEMP)/1.609
Supply Voltage Ramping
Fast ramping of the supply voltage can cause a current glitch in the internal ESD protection circuits. Depending on the supply inductance, this could result in a supply volt-age transient that exceeds the maximum rating. A supply voltage ramp time of greater than 1ms is recommended.
It is recommended that the EN pin be used to enable or disable the LTC5576 with VCC held constant. However, if the EN pin and VCC are switched simultaneously, then the configuration shown in Figure 12 is recommended. A maximum VCC ramp rate at pins 6 and 7 of 20V/ms is recommended.
JUNCTION TEMPERATURE (°C)–50
TEM
P PI
N VO
LTAG
E (m
V) 800
850
750
700
650
600
9070503010–10–30 110
550
500
900
5576 F11
IIN = 80µA
IIN = 10µA
Figure 12. Suggested Configuration for Simultaneous VCC and EN Switching
Auto Supply Voltage Detection
An internal circuit automatically detects the supply volt-age and configures internal components for 3.3V or 5V operation. The DC current is affected when the auto-detect circuit switches at approximately 4.1V. To avoid undesired operation, the mixer should only be operated in the 3.1V to 3.6V or 4.5V to 5.3V supply ranges.
Spurious Output Levels
Mixer spurious output levels vs harmonics of the IN and LO frequencies are tabulated in Tables 5 and 6 for the 5V, 5800MHz application. Results are shown for spur frequen-cies up to 18GHz. The spur frequencies can be calculated using the following equation:
fSPUR = |M • fIN ± N • fLO|
Table 5 lists the difference spurs (fSPUR = |M • fIN – N • fLO|) and Table 6 lists the sum spurs (fSPUR = |M • fIN + N • fLO|). The spur levels were measured on a standard evaluation board at room temperature using the test circuit of Figure 1.
The spurious output levels for any application will be de-pendent on the external matching circuits and the particular application frequencies.
5576 F12
LTC5576
5 6 7
220µF
0.5Ω
10k
10nF
VCCSUPPLY
VCCVCCEN
LTC5576
195576f
For more information www.linear.com/LTC5576
applicaTions inForMaTionTable 5. Output Spur Levels (dBc), fSPUR = |M • fIN – N • fLO|(fIN = 900MHz, fOUT = 5.8GHz, Low Side LO at 0dBm)
N
0 1 2 3 4 5
M
0 – –22.4 2.3 –24.6
1 –56.3 –0.8 –38.5 –34.6
2 –72.3 –51.9 –49.7 –68.6 –81.1
3 –81.9 –75.7 –76.7 –69.7 *
4 * * * * *
5 * * * * *
6 * * * * *
7 * * * * *
8 * * * * * *
9 * * * * * *
10 * * * * * *
*Less Than –90dBc
Table 6. Output Spur Levels (dBc), fSPUR = |M • fIN + N • fLO|(fIN = 900MHz, fOUT = 5.8GHz, Low Side LO at 0dBm)
N
0 1 2 3 4 5
M
0 – –22.4 2.3 –24.7
1 –56.3 0.0 –39.3 –39.5
2 –72.2 –49.2 –45.6 –73.4
3 -81.9 –71.7 –82.6 *
4 * * –87.0
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * *
*Less Than –90dBc
Typical applicaTions
IN100MHz TO
2400MHzLTC5576
IN+
1000pF
1:1TC1-1-13M+
1000pF
IN–
LGND
EN
EN
10nF 1µF
0.2pF
VCC
5V
IADJ
2.61k
GND
GND
OUT
VCC
TEMPTEMP
5576 TA02a
1
2
3
4
12
11
10
9
5 6 7 8
OUT4700MHz TO7000MHz
GND
LOTP GND GND16 15 14 13
0Ω
0.3pF
100pF
LO4600MHz
OUTPUT FREQUENCY (MHz)4500
GAIN
(dB)
, OIP
3 (d
Bm)
25
30
15
20
10
5
0
–5
5576 TA02b
70005000 5500 6000 6500
TC = 105°C85°C25°C–40°C
fLO = 4.6GHz
1.2GHz to 5.8GHz Upmixer with 2.3GHz Bandwidth Conversion Gain and OIP3 vs Output Frequency
LTC5576
205576f
For more information www.linear.com/LTC5576
Typical applicaTions
Conversion Gain and OIP3 vs Input Frequency
Noise Figure vs Input Frequency
LO-OUT Leakage vs LO Frequency
IN, OUT and LO Port Return Loss vs Frequency
Upmixer with Broadband Input and 3GHz Output
IN100MHz TO
1200MHzLTC5576
IN+
1000pF
1:1TC1-1-13M+
1000pF
IN–
LGND
EN
EN
10nF 1µF
0.5pF
VCC
5V
IADJ
2.61k
GND
GND
OUT
VCC
TEMPTEMP
5576 TA03a
1
2
3
4
12
11
10
9
5 6 7 8
OUT3000MHz
GND
LOTP GND GND16 15 14 13
0.3pF
100pF
LO 1800MHzTO 4200MHz
0.7pF
INPUT FREQUENCY (MHz)0
OIP3
(dBm
) GAIN (dB)
25
30
15
20
10
5
0
3
4
1
2
0
–1
–2
5576 TA03b
1200200 400 600 800 1000
LSLOHSLO
TC = 25°C
LO FREQUENCY (MHz)1800
LO L
EAKA
GE (d
Bm)
–10
0
–30
–20
–40
–50
–60
–70
5576 TA03c
42002200 2600 3000 3400 3800
LSLOHSLO
TC = 25°C
INPUT FREQUENCY (MHz)0
NOIS
E FI
GURE
(dB)
15
16
13
14
12
11
10
9
8
5576 TA03d
1200200 400 600 800 1000
LSLOHSLO
TC = 25°C
FREQUENCY (MHz)0
RETU
RN L
OSS
(dB)
0
–10
–5
–15
–20
–25
5576 TA03e
4000
IN
OUT
LO
1000 2000 3000
LTC5576
215576f
For more information www.linear.com/LTC5576
Typical applicaTions
OIP3 vs Input FrequencyConversion Gain vs Input Frequency
IN, OUT and LO Return Loss vs Frequency
Broadband 4GHz to 6GHz Output Matching with Fixed LO Frequency (High Side LO)
IN300MHz TO
2300MHzLTC5576
IN+
1000pF
1:1TC1-1-13M+
1000pF
IN–
LGND
EN
EN
10nF 1µF
0.6pF
3.3nH
VCC
5V
IADJ
2.61k
GND
GND
OUT
VCC
TEMPTEMP
5576 TA04a
1
2
3
4
12
11
10
9
5 6 7 8
OUT4GHz TO 6GHz
GND
LOTP GND GND16 15 14 13
0.3pF
100pF
LO 6.3GHz
0.7pF
INPUT FREQUENCY (MHz)0
OIP3
(dBm
)
30
25
35
15
20
10
5
0
5576 TA04b
2500500 1000 1500 2000
fLO = 6300MHz
TC = 105°C85°C25°C–40°C
INPUT FREQUENCY (MHz)0
GAIN
(dB)
4
3
5
1
2
0
–1
–2
–3
5576 TA04c
2500500 1000 1500 2000
fLO = 6300MHzTC = 105°C85°C25°C–40°C
FREQUENCY (MHz)0
RETU
RN L
OSS
(dB)
0
–10
–5
–15
–20
–25
5576 TA04d
8000
IN
OUT
LO
2000 4000 6000
LTC5576
225576f
For more information www.linear.com/LTC5576
Typical applicaTions
IN5.5GHz TO
6GHzLTC5576
IN+
1000pF
1:1TCM1-63AX+
1000pF
IN–
LGND
EN
EN
10nF 1µF
0.5pF
6.8nH
VCC
5V
IADJ
OPEN
GND
GND
OUT
VCC
TEMPTEMP
5576 TA06a
1
2
3
4
12
11
10
9
5 6 7 8
OUT 3.2GHzTO 3.7GHz
GND
LOTP GND GND16 15 14 13
0.3pF
100pF
LO 2300MHz
0.3pF 0.05pFINPUT FREQUENCY (MHz)
5500
GAIN
(dB)
, OIP
3 (d
Bm)
25
15
20
10
5
–5
0
5576 TA06b
60005600 5700 5800 5900
fLO = 2300MHzfOUT = fIN – fLO
TC = 105°C85°C25°C–40°C
IN100MHz TO
6000MHzLTC5576
IN+
1000pF
1:1TCM1-63AX+
1000pF
IN–
LGND
EN
EN
10nF 1µF
0.2pF
0Ω
VCC
5V
IADJ
1.7k
GND
GND
OUT
VCC
TEMPTEMP
5576 TA05a
1
2
3
4
12
11
10
9
5 6 7 8
OUT6500MHz
GND
LOTP GND GND16 15 14 13
0.3pF
100pF
LO 500MHz TO6400MHz
0.3pF 0.05pF
Very Broadband 100MHz to 6GHz Input Matching with 6.5GHz Output and Low Side LO
Downmixer Applications, 5.8GHz to 3.5GHz with Low Side LO
INPUT FREQUENCY (MHz)0
GAIN
(dB)
, OIP
3 (d
Bm) RETURN LOSS (dB)
30
20
25
15
10
5
0
–5
5
–5
0
–10
–15
–20
–25
–30
5576 TA05b
8000
OIP3
GC
2000 4000 6000
IN RET LOSS
TC = 25°CfOUT = 6.5GHzfLO = fOUT –fIN
Conversion Gain, OIP3 and IN Return Loss vs Input Frequency
Conversion Gain and OIP3 vs Input Frequency
LTC5576
235576f
For more information www.linear.com/LTC5576
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
package DescripTionPlease refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
4.00 ±0.10(4 SIDES)
NOTE:1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WGGC)2. DRAWING NOT TO SCALE3. ALL DIMENSIONS ARE IN MILLIMETERS4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE5. EXPOSED PAD SHALL BE SOLDER PLATED6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE
PIN 1TOP MARK(NOTE 6)
0.55 ±0.20
1615
1
2
BOTTOM VIEW—EXPOSED PAD
2.15 ±0.10(4-SIDES)
0.75 ±0.05 R = 0.115TYP
0.30 ±0.05
0.65 BSC
0.200 REF
0.00 – 0.05
(UF16) QFN 10-04
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.72 ±0.05
0.30 ±0.050.65 BSC
2.15 ±0.05(4 SIDES)2.90 ±0.05
4.35 ±0.05
PACKAGE OUTLINE
PIN 1 NOTCH R = 0.20 TYPOR 0.35 × 45° CHAMFER
UF Package16-Lead Plastic QFN (4mm × 4mm)
(Reference LTC DWG # 05-08-1692 Rev Ø)
LTC5576
245576f
For more information www.linear.com/LTC5576 LINEAR TECHNOLOGY CORPORATION 2015
LT 0515 • PRINTED IN USALinear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC5576
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTSMixers and ModulatorsLTC5510 1MHz to 6MHz, Wideband High Linearity Active
Mixer1.5dB Gain, Up and Downconversion, 3.3V or 5V Supply
LT®5578 400MHz to 2.7GHz Upconverting Mixer 27dBm OIP3 at 900MHz, 24.2dBm at 1.95GHz, Integrated RF Output TransformerLT5579 1.5GHz to 3.8GHz Upconverting Mixer 27.3dBm OIP3 at 2.14GHz, NF = 9.9dB, 3.3V Supply, Single-Ended LO and RF PortsLTC5577 300MHz to 6GHz High Signal Level Active
Downconverting Mixer0dB Gain, 30dBm IIP3 and 15dBm Input P1dB, 3.3V/180mA Supply
LTC5551 300MHz to 3.5GHz Ultra High Dynamic Range Downconverting Mixer
36dBm IIP3, 2.4dB Gain, 9.7dB NF, 0dBm LO Drive, 18dBm P1dB
LTC5544 4GHz to 6GHz, 3.3V High Gain Downconverting Mixer
24dB Gain, 25.9dBm IIP3 and 11.3dB NF at 5.25GHz, 3.3V/194mA Supply
LTC5588-1 200MHz to 6GHz I/Q Modulator 31dBm OIP3 at 2.14GHz, –160.6dBm/Hz Noise FloorLTC5585 700MHz to 3GHz Wideband I/Q Demodulator >530MHz Demodulation Bandwidth, IIP2 Tunable to >80dBm, DC Offset NullingAmplifiersLTC6430-15 High Linearity Differential IF Amp 20MHz to 2GHz Bandwidth, 15.2dB Gain, 50dBm OIP3, 3dB NF at 240MHzLTC6431-15 High Linearity Single-Ended IF Amp 20MHz to 1.7GHz Bandwidth, 15.5dB Gain, 47dBm OIP3, 3.3dB NF at 240MHzLTC6412 31dB Linear Analog VGA 35dBm OIP3 at 240MHz, Continuous Gain Range –14dB to 17dBLT5554 Ultralow Distortion IF Digital VGA 48dBm OIP3 at 200MHz, 2dB to 18dB Gain Range, 0.125dB Gain StepsRF Power DetectorsLT5538 40MHz to 3.8GHz Log Detector ±0.8dB Accuracy Over Temperature, –72dBm Sensitivity, 75dB Dynamic RangeLT5581 6GHz Low Power RMS Detector 40dB Dynamic Range, ±1dB Accuracy Over Temperature, 1.5mA Supply CurrentLTC5582 40MHz to 10GHz RMS Detector ±0.5dB Accuracy Over Temperature, ±0.2dB Linearity Error, 57dB Dynamic RangeLTC5583 Dual 6GHz RMS Power Detector Up to 60dB Dynamic Range, ±0.5dB Accuracy Over Temperature, >50dB IsolationADCsLTC2208 16-Bit, 130Msps ADC 78dBFS Noise Floor, >83dB SFDR at 250MHzLTC2153-14 14-Bit, 310Msps Low Power ADC 68.8dBFS SNR, 88dB SFDR, 401mW Power ConsumptionRF PLL/Synthesizer with VCOLTC6948 Low Noise, Low Spurious Fractional-N PLL with
Integrated VCO373MHz to 6.39GHz, –157dBc/Hz WB Phase Noise Floor, –108dBc/Hz Closed-Loop Phase Noise
IN100MHz TO
1200MHz LTC5576IN+
1000pF
IN–
LGND
EN
EN
10nF 1µF
0.5pF
6.8nH
VCC
5V
IADJ
3k
GND
GND
OUT
VCC
TEMPTEMP
5576 TA07a
1
2
3
4
12
11
10
9
5 6 7 8
OUT 3.5GHz
GND
LOTP GND GND16 15 14 13
100pF
LO 3600MHzTO 4700MHz
1000pF
INPUT FREQUENCY (MHz)0
GAIN
(dB)
, OIP
3 (d
Bm)
30
25
15
20
10
5
–5
0
5576 TA07b
1200200 400 600 800 1000
fOUT = 3500MHzfLO = fOUT – fIN
TC = 105°C85°C25°C–40°C
Single-Ended Input with 3.5GHz Output
Gain and OIP3 vs Input Frequency
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