qualcomm confidential and proprietary
TRANSCRIPT
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007
QUALCOMM Confidential and Proprietary
Restricted Distribution. Not to be distributed to non-employees of QUALCOMM or its subsidiaries without the express approval of QUALCOMM’s Configuration Management.
Not to be used, copied, reproduced in whole or in part, nor its contents revealed in any manner to others without the express written permission of QUALCOMM.
QUALCOMM is a registered trademark and registered service mark of QUALCOMM Incorporated. Other product and brand names may be trademarks or registered trademarks of their respective owners. CDMA2000 is a registered certification mark of the Telecommunications Industry Association, used under license. ARM is a registered trademark of ARM Limited. QDSP is a registered trademark of QUALCOMM Incorporated in the United States and other countries.
Export of this technology may be controlled by the United States Government. Diversion contrary to U.S. law prohibited.
QUALCOMM Incorporated5775 Morehouse Drive
San Diego, CA 92121-1714 U.S.A.
Copyright © 2007 QUALCOMM Incorporated. All rights reserved.
Page 1
QSC6055/QSC6065/QSC6075/QSC6085 Hardware Training
Analog/RF Topics
80-VC881-22 Rev. A
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 2
Revision history
Revision Date Description
A April 2007 Initial release
The following information is licensed and
proprietary material.
Copyright © 2007 QUALCOMM Incorporated. All rights reserved.
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 3
QSC60X5 Analog/RF Overview
• Introduction to QSC60X5 analog/RF functions– Including introduction to QSC6075 and possible
tri-band CDMA with Rx diversity application
• RF Rx design guidelines
• RF Tx design guidelines
• External RF component recommendations
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 4
Design Improvements
QSC6055/QSC6065 Block Diagram
QSC6055/6065Key Features
• RFCMOS Transceiver
• Dual band
• SGPS
• XO to reduce cost
• IntelliCeiverTM
• PA Bypass
• No AMPS
• No Rx Diversity
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 5
Design Improvements
QSC6075Key Features
• RFCMOS Transceiver
• Dual band
• Receive Diversity
• SGPS
• On Chip SHDR VCO
• XO to reduce cost
• IntelliCeiverTM
• PA Bypass
• No AMPS
QSC6075 Block Diagram
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 6
Key Features – QSC6055, QSC6065, QSC6075
» High level of integration & simpler implementation• QSC6055’QSC6065 include one receiver and one transmitter; QSC6075 includes two receivers and one
transmitter• Include PLL and VCO’s for low and high CDMA bands• Include PLL and VCO’s for GPS • QSC6075 includes internal SHDR VCO/PLL function
» Improved power savings• Uses an advanced RF CMOS process• Include “PA Bypass” driver amp• Offer IntelliCeiverTM
YesYesYesYesYesYesYesNoYesYesYes
YesYesYesYes
RTR6500
YesYesYesYesNoYesYesNoNoYesn/a
n/aYesYesn/a
QSC6065/65
YesNoBlock G (BC14)YesYesIMT (BC6)
High Band
NoNoCDMA450 (BC5)
Low Bandn/aYesSBI / SSBI
YesNoAWS (BC15)
NoYesKPCS (BC4)YesYesPCS (BC1)
YesYesIntegrated LNA, VCO’s, and PLLs
YesNoCell Ext. (BC10)
NoYesJCDMA (BC3)YesYesUS Cell (BC0) [No AMPS]
YesYesSGPSYesYesNon-diversity
Yesn/aDiversity (both low band and high band)
Yesn/aSimultaneous HDR (no external VCO needed)
QSC6075/85RFR6185
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 7
Only the two RF functional blocks are discussed here (Rx and Tx). This material includes: functions, interfaces, design guidelines, etc.
Details for the audio and HKADC blocks are included in the Baseband section (for consistency with previous QCT training sessions).
QSC60X5 Analog/RF Functions
Four major functional blocks 1
RF transmittersw/ Tx LO
4 Housekeeping ADC
3
RF receiversw/ Rx LOs
2
Wideband audio CODEC
HKADCfrom handset
sensors
Analog / RF
PM AMUX_OUT
AAC/AAC+, AMR, CMX, EVRC, MIDI, MP3, QCELP
Handset speaker
Headset speaker
Handset microphone
CODEC supportAudio
AAC/AAC+, CMX, MIDI,
MP3
SW support
Earpiece speaker
Headset microphone
Power, GND, bias
Speaker driver
Power Management
Housekeeping ADC
Line in
Line out
power detect
LPF
QuadDconvert
CDMA Rx
GPS Rx
Jammer detect
Antenna
Tx DAC REF
gain ctl circuits
controlcircuitsctls
loop filter
bus
status & controls
F refRF_TCXO
QuadUconvert
QuadUconvert
TX LO circuits
LPF
loop filter
GRX LO circuits
ADC_I
REF & CLK Generation
ADC_Q
CRX LO circuits
loop filter
LPF LPFBPF
BPFLPF LPF
ADC_I
ADC_Q
RF Transmitter
J status
frontend
module
LPF LPF
LPF LPF
frontend
module
Tx
Tx
One-touch headset detect
F ref
QuadDconvert
QuadDconvert
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 8
Analog/RF Features
• RF transmitters– Optimized for dual-band CDMA
» Cell and PCS/AWS, voice and data– Full upconversions (analog BB to RF)– Transmit signal path circuits
» Baseband amplifiers & filters» BB-to-RF quadrature upconverter» RF AGC amplifiers and driver amps» Two Tx outputs per band → PA bypass
– Complete Tx LO source (VCO, PLL, dist)– 85 dB Tx gain control range– Power reduction features; more talk time
• RF receivers– Optimized for dual-band CDMA + GPS
» Cell and PCS/AWS, voice and data– 1x voice and data; Simultaneous-GPS– IntelliCeiver™ technology– Full downconversions from RF to BB– Rx signal path circuits (2 CDMA + GPS)
» RF amplifiers (including LNA)» Stepped gain control» RF-to-BB quadrature downconverters» Lowpass filters, baseband amplifiers» Analog-to-digital converters
– Complete Rx LO sources (VCO, PLL, dist)» Separate CDMA and GPS LOs
– ADC reference and clock circuits
• Housekeeping ADC– 5:1 mux (2 external, 2 from RF Tx, 1 from PM amux)– Selectable reference voltage– 12-bit resolution; 10-bit accuracy; 2.4 MHz sampling– Monitors handset functions
» VBAT, temp, HDET, XO_THERM, PA_THERM, etc
• Audio CODEC– Tx inputs: handset & headset microphones, line-in
» Summing of DAC line-in outputs– Rx outputs: earpiece & headphone, speaker, line-out
» Capless or cap-coupled stereo headphone configurations» Simultaneous output port operation
– Microphone bias and one-touch headset control– FM radio mono record– Many programmable Rx and Tx parameters– Software support (within baseband circuits)
» EVRC, 13k QCELP, ADPCM» 4GV – narrow band» MP3 decode mono playback» I2S interface for external SDAC» Acoustic echo cancellation for speakerphones» Polyphonic support» Compact Media Extension (CMX)» Audio playback from memory or download files» Voice and digit dialing» Voice memo/conversation recording (half-duplex)
Analog features are covered in the Baseband section
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 9
Tri-band Implementation with Rx Diversity
QSC6075 device
HB LNA
LB LNA
CellBPF
Antenna
PCSBPF
Rx
Tx
CellBPF
Tx_samplePower detector
bypass PA
AWSBPF
bypass PA
PA
Rx
Tx
Rx
Tx
GPSBPF
CellBPF
PCSBPF
AWSBPF
Antenna
PCSBPF
AWSBPF
LB Tx (1 of 2)
LB Tx (2 of 2)
HB Tx (2 of 2)
HB Tx (1 of 2)
LB downconverter
HB downconverter
GPS in
LB SRx in
HB SRx in
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 10
QSC6055 BC0 / BC1 RF Section Block Diagram
• PA Bypass in both bands
• SGPS
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 11
QSC6055 BC0/BC1/BC15 RF Section Block Diagram
• PA Bypass in three bands
• SGPS
• High band switches
QSC
6055
Bas
eban
d
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 12
QSC6075 BC0/BC1 RF Section Block Diagram
• PA Bypass in both bands
• SGPS
• SHDR
• On-chip SHDR VCO
• Rx Diversity
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 13
Receiver Design Guidelines
• RF receiver block diagram and features
• Pin assignments
• RF Rx interfaces
• Rx LO and PLL topics
• DC power connections to Rx functions
• Rx performance specifications
See the “PCB Layout Guidelines” section (80-VC881-25) for RF Rx layout suggestions – presented later today
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 14
QSC60X5 RF Receiver Features
• Optimized for dual-band CDMA + GPS– CDMA: Cell + PCS/AWS
• 1x voice and data; Simultaneous-GPS
• IntelliCeiver™ technology
• Full downconversions from RF to BB
• Complete Rx LO sources (VCO, PLL, dist)– Separate CDMA and GPS LOs
MN
MN
MN
MN
to b
aseb
and
circ
uits
MN
MN
tripl
exer
MN
to b
aseb
and
circ
uits
• Rx signal path circuits (2 CDMA + GPS)– RF amplifiers (including LNA)– Stepped gain control– RF-to-BB quadrature downconverters– Lowpass filters, baseband amplifiers– Analog-to-digital converters
• ADC reference and clock circuits
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 15
10 11 12 13 14 15 16 17 18 19 20 21 22 23
UART1 GPIO MODE VDD GND RX_IN GND GND RX_IN RX_IN RBIAS LNA_OUT LNA_OUT GND
_RX_D _8 _2 _RFRX2 _A_RF _GPS _A_RF _A_RF _C_LB _C_HB _RX _C_LB _C_HB _A_RF
UART1 GPIO MODE VDD GND GND GND GND GND GND GND VDD_ GND MIX_INP
_TX_D _28 _1 _RFRX2 _A_RF _A_RF _A_RF _A_RF _A_RF _A_RF _A_RF RFRX1 _A_RF _C_LB
GPIO VDD VDD VCO_ VDD VDD VDD VDD VDD_ GND VDD_ VDD_ VDD_ MIX_INM
_30 _P5 _CORE TUN_GRX _RFRX2 _RFRX2 _RFRX2 _RFRX2 RFRX1 _A_RF RFRX1 RFRX1 RFRX1 _C_LB
VCO_ GND MIX_INP
TUN_CRX _A_RF _C_HB
GPIO VDD GND VDD GND VDD GND VDD_ GND MIX_INM
_27 _P4 _DIG _RFRX2 _A_RF _RFRX2 _A_RF RFRX1 _A_RF _C_HB
WDOG MODE GND VDD VDD GND LINE_IN GND VDD GND
_EN _0 _DIG _RFRX1 _RFRX2 _A_RF _R_N _A_RF _RFRX1 _A_RF
LINE_IN VDD
_L_P _A
DNC
DNC DNC
DNCDNC
CCOMP
MIC2P MIC1NMIC1P
A
C
B
D
F
E
G
QSC60X5 RF Receiver Pin Assignments
CD
MA
LN
A in
pu
ts –
low
ban
d &
hig
h b
and
Ext
ern
al L
NA
bia
s re
sist
or
CDMA downconverterinputs – low band
& high bandGPS Rx LO charge pump output & VCO tuning port
CDMA Rx LO charge pump output & VCO tuning port
GPS LNA input
CD
MA
LN
A o
utp
uts
–lo
w b
and
& h
igh
ban
d
QSC6075 will use A16 and A17 for Cell and PCS secondary CDMA inputs
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 16
from
du
plex
er Cel
lula
r R
x B
PF
Low Band CDMA RF Receiver Interfaces
• Values shown are recommendedstarting values; each handset willrequire empirical optimization
• Components labeled “DNI” werenot required in the reference designbut should be included in initiallayouts for optimization flexibility
• Parallel RL combination provides DC bias path and is also part of the RF matching network
• Locate the 100 pF capacitor(C23) as close to the RL nodeas possible (AC ground)
• High-Q, tight-tolerance inductorscan be used to reduce losses andimprove LNA performance if needed(0402 package is recommended)
• DC blocking capacitors arerequired between SAW devicesand LNA ports to avoid stressfrom DC voltage that might impactSAW performance over time
• Downconverter requires differential input for common-mode rejection and 2nd-order non-linearity performance
• Maintain symmetry from filter to MIX_IN; RF phase and amplitude balance
• Grounds must be connected directly fromcomponent pads to inner layer ground plane
See QSC60X5 Design Guidelines (80-VC881-5) for the recommended matching procedure
• 1% external bias resistor
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 17
High Band CDMA & GPS RF Receiver Interfaces
•GPS: Customer can’t really measure gain and noise figure in GPS. The matching procedure for GPS should be changed. Measurement of S11 should be used to get an initial Matching Network. Customer can try to see if they can
arrive at optimal Matching Networks by maximizing C/No reported by QDART.
from
du
plex
er PC
SR
x BP
F
from
tri
plex
er
•Low band CDMA comments apply – see previous page
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 18
RF Receiver LO and PLL Topics
! Baseline Rx PLL loop filter design; see Design Guidelines (80-VC881-5) for updates and more information
! Request loop filter design assistance using https://support.cdmatech.com if needed
• Two Rx LO synthesizers are fullyintegrated except their loop filters CDMA (shared by low & high bands) Dedicated GPS
• Each loop filter requires just twocapacitors and one resistor
• Locate all near the QSC pins,giving priority to “C2”
• Ground R1 and C2 directly tothe nearby QSC ground
• Use 1% resistors, 10% capacitors
4.7 nF
Band CP_I PM loop BW lock time R1 C1 C2
Cellular CDMA TBD mA TBD deg TBD kHz TBD msec 560 82 nF 5.6 nF
US PCS CDMA TBD mA TBD deg TBD kHz TBD msec 560 82 nF 5.6 nF
GPS TBD mA TBD deg TBD kHz TBD msec 422 68 nF 4.7 nF
Loop filter component valuesLoop parameters
4.7 nF
4.7 nF
499
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 19
RF Receiver DC Power Connections
• The power supply groupings shown at the left should be followed in all new designs.
• Pads for series resistors are included several places (zero-Ω Rs) to allow isolating elements to be inserted during PCB development; they can be omitted from production designs if not needed.
• Each supply grouping includes one pin that requires a non-zero series R (VCO supplies):
– VDD_RFRX1 pin C20 uses 2.2 Ω– VDD_RFRX2 pin E13 uses 4.7 Ω
• Some input pins require individual bypass caps (such as B21), but most allow a single bypass cap to be shared by multiple pins. Locate near QSC pins.
• Minimize IR drops and inductive transients by keeping traces as short as possible and by using wide traces or fill areas.
• Use multiple vias, large vias, and/or or filled vias when routing between layers to avoid high resistance.
• Pins H16 and H22 are VDD_RFTX pins, but they are connected to the VREG_RFRX1 output to ensure they are powered up earlier than other VDD_RFTX pins (required to meet internal timing constraints).
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 20
RF Rx Performance Specifications
• The QSC60x5 CDMA receivers are fully compliant with the applicable standards, including the key parameters listed in the table below.
• Meeting these specifications requires adequate performance by key external RF components, including:
– Cellular/PCS/GPS triplexer– Cellular and PCS duplexers– Cellular and PCS Rx inter-stage bandpass filters– Cellular and PCS Tx output filters– Cellular and PCS power amplifiers
• External component requirements are discussed in detail shortly.
• Provided the external RF components meet their requirements, the QSC RF receivers’performance is adequate to ensure compliance with the applicable standards.
Parameter Test conditions Min Typ Max Units Min Typ Max Units
Sensitivity (IS-98, 3.5.1) -108.5 dBm -107.5 dBm
Dynamic range (IS-98, 3.5.1) -25.0 dBm -25.0 dBm
Single-tone desensitization (IS-98, 3.5.2) -101 dBm Ior -30.0 dBm -30.0 dBm
Intermodulation spurious response attenuation -101 dBm Ior -43.0 dBm -43.0 dBm
(two-tone desensitization; IS-98, 3.5.3) -90 dBm Ior -32.0 dBm N/A dBm
-79 dBm Ior -21.0 dBm N/A dBm
Cellular band US PCS band
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 21
RF Receiver Questions?
! Also, you can submit questions to https://support.cdmatech.com at any time.
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 22
Transmitter Design Guidelines
• RF transmitter block diagram and features
• Pin assignments
• RF Tx interfaces
• Bypass PA
• Tx LO and PLL topics
• DC power connections to Tx functions
• Example Tx performance specifications
See the “PCB Layout Guidelines” section (80-VC881-25) for RF Tx layout suggestions – presented later today
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 23
• Transmit signal path circuits– Baseband amplifiers & filters
– BB-to-RF quadrature upconverter– RF AGC amplifiers and driver amps
– Two Tx outputs per band → PA bypass
• Power reduction features; more talk time
QSC60X5 RF Transmitter Features
• Optimized for dual-band CDMA– Cell and PCS/AWS, voice and data
• Full upconversions (analog BB to RF)
• Complete Tx LO source (VCO, PLL, dist)
• 85 dB Tx gain control range
Tx DAC REF
QuadratureUpconverter
Antenna
QSC60x5 RF Transmitters
LPFTx LO
K23
L23
MN
LPF
PCSBPFPARx
Tx QuadratureUpconverter
G_ctlTx PWRdetector
M23
N23
J16
toPCS Rx
CellBPFPARx
Tx
toCell Rx
MN
Tx_sample
MN
MN
RBIAS_TX
H23
Cell front-end module or discrete components
PCS front-end module or discrete components
toGPS Rx
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 24
QSC60X5 RF Transmitter Pin Assignments
Tx power detector input
Tx
LO
ch
arg
e p
um
p o
utp
ut
& V
CO
tu
nin
g p
ort
Ext
ern
al T
x b
ias
resi
sto
r
14 15 16 17 18 19 20 21 22 23
VDD VDD VDD VDD VDD_ GND VDD_ VDD_ VDD_ MIX_INM
_RFRX2 _RFRX2 _RFRX2 _RFRX2 RFRX1 _A_RF RFRX1 RFRX1 RFRX1 _C_LB
VCO_ GND MIX_INP
TUN_CRX _A_RF _C_HB
GND VDD GND VDD_ GND MIX_INM
_A_RF _RFRX2 _A_RF RFRX1 _A_RF _C_HB
VDD GND LINE_IN GND VDD GND
_RFRX2 _A_RF _R_N _A_RF _RFRX1 _A_RF
LINE_IN VDD
_L_P _A
GND GND VDD VDD GND VDD PWR_
_A_RF _A_RF _RFTX _RFTX _A_RF _RFTX DET_IN
GND GND RBIAS GND VCO_ VDD GND VDD
_A_RF _A_RF _TX _A_RF TUN_TX _RFTX _A_RF _RFTX
GND GND VDD VDD GND VDD VDD TX_OUT
_A_RF _A_RF _RFTX _RFTX _A_RF _RFTX _RFTX _LB_B
GND GND HPH_OUT LINE_OUT GND TX_OUT
_A_RF _A_RF _R_N _L_P _A_RF _LB_A
GND GND VDD VDD HPH_ HPH_OUT LINE_OUT TX_OUT
_A_RF _A_RF _A _A VNEG _L_P _R_N _HB_A
GND GND GND GND VDD VDD TX_OUT
_A_RF _A_RF _A_RF _A_RF _A _A _HB_B
GND GND NCP_ VREG VDD XO_ADC
_DIG _DIG CTC1 _NCP _IN2 _REF
DNC
DNC DNC
NCP_FB
EAR1OP
DNCDNC
CCOMP
MIC2P
HKAIN1
MIC1NMIC1P
MIC2N
C
D
EAR1ON
F
E
K
J
H
G
M
L
HKAIN0 P
N
Two CDMA low band Tx outputs (supports PA bypass)
Two CDMA high band Tx outputs (supports PA bypass)
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 25
C112 pF
L1DNI
Antenna
QSC60x5 RF Transmitter
toGPS Rx
K23
L23G_ctl
Tx PWRdetector
H23
C212 pF
L2DNI
C312 pF
L3DNI
M23
N23
C412 pF
L4DNI
Tx_sample
Cellular front-end moduleor discrete components
PCS front-end moduleor discrete components
from Cellular upconverter
from PCS upconverter
DA
G_ctl
DA
DA
DA
QSC60X5 RF Transmitter Interfaces
• Values shown are recommendedstarting values; each handsetrequires empirical optimization
• Components labeled “DNI” werenot required in the reference designbut should be included in initiallayouts for optimization flexibility
• Two outputs for each band –supports PA bypassing
See QSC60X5 Design Guidelines (80-VC881-5)for the recommended matching procedure.
• One output to the Tx chain (Tx filter, PA, and SPDT switch);other directly to SPDT switch (thereby bypassing PA)
• QSC ports are not AC-coupled;external DC-blockingcapacitors are required
• If PA bypass is not supported, leave unused output open• Each Tx output is 50-Ohm
nominal (single-ended)
bypass PA devices (PA + SW) are
currently available
bypass PA devices (PA + SW) are
currently available
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 26
Typical Connection for Bypass PA
QSC60x5DA
DATx
filter
VGA
EN
B
Mo
d e
VC
C
RF_INB
RF_IN
PA
_ON
PA
_R
AN
GE
PA_ON signal is routed to the Bypass PA directly from QSC60X5
The Bypass PA is 3X3 mm package.
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 27
RF Transmitter LO and PLL Topics
! Baseline Tx PLL loop filter design; see Design Guidelines (80-VC881-5) for updates and more information
! Request loop filter design assistance using https://support.cdmatech.com if needed
• The Tx LO synthesizer is fullyintegrated except its loop filter(shared by low & high bands)
• The loop filter requires just twocapacitors and one resistor
• Locate all near the QSC pins,giving priority to “C2”
• Ground R1 and C2 directly tothe nearby QSC ground
• Use 1% resistor, 10% capacitors
TXVCO
to Tx LOdistribution
circuits
QSC Tx LO circuits
VCO_TUNE_TX
REF
PLL circuits
to Rx PLLs
J19
loop filter
R1C2
C1
CP_OUTfrom TCXO distribution
circuits
FDBK
Band CP_I PM loop BW lock time R1 C1 C2
Cellular CDMA TBD mA TBD deg TBD kHz TBD msec 1.02 k 8.2 nF 560 pF
US PCS CDMA TBD mA TBD deg TBD kHz TBD msec 1.02 k 8.2 nF 560 pF
Loop parameters Loop filter component values
2.2 k
2.2 k
10 nF
10 nF
470 pF
470 pF
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 28
RF Transmitter DC Power Connections
• The power supply groupings shown at the right should be followed in all new designs.
• Pads for series resistors are included several places (zero-Ω Rs) to allow isolating elements to be inserted during PCB development; they can be omitted from production designs if not needed.
• One VREG_RFTX supply path requires a non-zero series R (VCO supply): pin H18 uses 10 Ω
• Some input pins require individual bypass caps (such as K22), but most allow a single bypass cap to be shared by multiple pins. Locate near QSC pins.
• Minimize IR drops and inductive transients by keeping traces as short as possible and by using wide traces or fill areas.
• Use multiple vias, large vias, and/or or filled vias when routing between layers to avoid high resistance.
• Pins H16 and H22 are VDD_RFTX pins, but they are connected to the VREG_RFRX1output to ensure they are powered up earlier than other VDD_RFTX pins (required to meet internal timing constraints).
VREG_RFRX1
RFTX regulator
VREG_RFTX T19
C18 VDD_RFRX1F13 VDD_RFRX1F21 VDD_RFRX1H16 VDD_RFTXE21 VDD_RFRX1H22
VDD_RFTX
H18 VDD_RFTX10
1.0 uF
K22 VDD_RFTXzero
1.0 uF
J21 VDD_RFTXzero
K18 VDD_RFTXJ23 VDD_RFTX
zero
K16 VDD_RFTXK21 VDD_RFTX
1.0 uF
1.0 uF
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 29
Example RF Tx Performance Specifications
! CDMA low band transmitter
! Tx power detector
See the Device Specification for complete specs
! CDMA high band transmitter
Parameter Min Typ Max Units
Input RF power -11 +2.0 dBm
Average power accuracy
P_IN from -11 to -7 dBm +/- 0.35 dB
P_IN from -7 to +2 dBm +/- 0.35 dB
Parameter Min Typ Max Units
Output power, max CDMA +7.0 dBm
Output power, min CDMA -75 dBm
Gain flatness -1.5 +1.5 dB
ACPR, 885 kHz offsets
PA mode -48.0 dBc/30 kHz
PA bypass mode -42.5 dBc/30 kHz
ACPR, 1.98 MHz offsets
PA mode -63.0 dBc/30 kHz
PA bypass mode -54.5 dBc/30 kHz
Rx-band noise power
Cellular Rx band -135 dBm/Hz
GPS band -135 dBm/Hz
Parameter Min Typ Max Units
Output power, max CDMA +7.0 dBm
Output power, min CDMA -75 dBm
Gain flatness -1.5 +1.5 dB
ACPR, 885 kHz offsets
PA mode -48.0 dBc/30 kHz
PA bypass mode -42.5 dBc/30 kHz
ACPR, 1.98 MHz offsets
PA mode -63.0 dBc/30 kHz
PA bypass mode -54.5 dBc/30 kHz
Rx-band noise power
PCS Rx band -135 dBm/Hz
GPS band -135 dBm/Hz
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 30
Cell RxBPF
B23
LNA
LNAC23
PCS RxBPF
D23
E23
A21
A22
A18
A19
LNA
A15
Antenna
K23
L23
PARx
Tx
Tx PWRdetector
M23
N23
CellBPFPA
Tx_sampleH23
QSC device
PCSBPF
Rx
Tx
External RF Component Recommendations
1) Triplexer2) Duplexers3) Couplers4) Bypass PAs5) Tx bandpass filters6) Rx bandpass filters
4 5
12 3
6
Key RF components:
QSC60x5 specifications rely upon adequate performance by these external components …
2
3
4 5
6
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 31
RF Components (1 of 6)
• Triplexer– Reference design used EPCOS B30231-D1034-R110– Key performance requirements:
» Ant port to Cell port insertion loss: < 1.0 dB» Ant port to PCS port insertion loss: < 0.6 dB» Ant port to GPS port insertion loss: < 2.0 dB» Cell port to GPS port attenuation, Cell Tx band: > 42 dB» Cell port to GPS port attenuation, GPS Rx band: > 10 dB» PCS port to GPS port attenuation, Cell Tx band: > 42 dB» PCS port to GPS port attenuation, GPS Rx band: > 10 dB
• Cellular duplexer– Reference design used Murata Erie SAYZW836MAD0F– Key performance requirements:
» Ant port to Rx port insertion loss: < 3.5 dB» Ant port to Rx port attenuation of BC0, BC1, and BC6 Tx jammers: > 35, 35, 35
dB» Ant port to Rx port attenuation of ISM Tx band: > 30 dB» Ant port to Rx port linearity (triple-beat): > 86 dB» Tx port to ant port insertion loss: < 2.5 dB» Tx port to ant port attenuation, Cell Rx band: > 44 dB (48 dB typ)» Tx port to ant port attenuation, GPS, PCS, IMT Rx bands: > 40, 27, 27 dB» Tx port to Rx port attenuation, Tx band over +15 to +65 °C: > 55 dB» Tx port to Rx port attenuation, Rx band: > 45 dB
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 32
RF Components (2 of 6)
• PCS duplexer– Reference design used Agilent Technologies ACMD-7402-TR1– Key performance requirements:
» Ant port to Rx port insertion loss over +15 to +65 °C: < 3.5 dB» Ant port to Rx port attenuation of BC0 and BC1 Tx jammers: > 35, 35 dB» Ant port to Rx port attenuation of GPS Rx, ISM Tx band: > 40, 30 dB» Ant port to Rx port linearity (triple-beat): > 86 dB» Tx port to ant port insertion loss: < 3.0 dB» Tx port to ant port attenuation, PCS Rx band: > 44 dB (48 dB typ)» Tx port to ant port attenuation, GPS, Cellular Rx bands: > 40, 27 dB» Tx port to Rx port attenuation, Tx band over +15 to +65 °C: > 55 dB» Tx port to Rx port attenuation, Rx band: > 44 dB (48 dB typ)
• AWS duplexer– Reference design used Murata Erie SAYZY1G73AA0FT0– Key performance requirements:
» Ant port to Rx port insertion loss over +15 to +65 °C: < 3.0 dB» Ant port to Rx port attenuation of BC0 and BC1 Tx jammers: > 35, 35 dB» Ant port to Rx port linearity (triple-beat): > 86 dB» Tx port to ant port insertion loss: < 3.0 dB» Tx port to ant port attenuation, AWS Rx band: > 48 dB» Tx port to ant port attenuation, GPS, Cellular Rx bands, PCS Rx bands: > 44, 27, 27 dB» Tx port to Rx port attenuation, Tx band over +15 to +65 °C: > 60 dB
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 33
RF Components (3 of 6)
• Directional couplers– Reference design used:
» AVX Corp CP0402A0836ENTR for Cell (27 dB nominal)» AVX Corp CP0402A1880FNTR for PCS and AWS (27 dB nominal)
• Cellular Bypass PA– Reference design used Anadigics AWT6331RM27Q7– Key performance requirements:
» Rated P_OUT: > +28 dBm» Gain at +28 dBm, < +16 dBm, < 0 dBm (bypass): > +24, +13, -3.0 dB» Rx band noise power, Cell and GPS bands: < -135 dBm/Hz» ACPR at 885 kHz offset, 1.98 MHz offset: < -44 dBc, -57 dBc
• PCS Bypass PA– Reference design used Anadigics AWT6332RM27Q7– Key performance requirements:
» Rated P_OUT: > +28 dBm» Gain at +28 dBm, < +16 dBm: > +25, +13 dB» Rx band noise power, GPS and PCS bands: < -135 and -140 dBm/Hz» ACPR at 1.25 MHz offset, 2.25 MHz offset: < -44 dBc, -57 dBc
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 34
RF Components (4 of 6)
• Cellular Tx bandpass filter– Reference design used Murata Erie SAFEB836MAL0F00– Key performance requirements:
» Insertion loss: < 2.5 dB» Attenuation DC to 800 MHz, Cell Rx, GPS Rx, IMT Rx: 35, 40,
35, 35 dB» Input power without performance degradation: > +15 dBm
• PCS Tx bandpass filter– Reference design used EPCOS B39192-B9014-E910– Key performance requirements:
» Insertion loss: < 3.5 dB» Attenuation Cell Rx, GPS Rx, extended IMT Rx, PCS Rx, ISM Rx:
10, 35, 10, 35, 35 dB» Input power without performance degradation: > +20 dBm
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 35
RF Components (5 of 6)
• AWS Tx bandpass filter– Reference design used Murata Erie SAFEA1G73AA0FT0– Key performance requirements:
» Insertion loss: < 3.0 dB» Attenuation DC to 1500 MHz, Cell Rx, GPS Rx, PCS Rx: 25, 40,
35, 40 dB» Input power without performance degradation: < +13 dBm
• Cellular Rx bandpass filter– Reference design used Fujitsu Media Devices FAR-F5KB-
881M50-B4ED– Key performance requirements:
» Insertion loss: < 3.0 dB» Attenuation 10 to 824 MHz, Cell Tx: 30, 35 dB» Amplitude and phase imbalance: see curve below
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 36
RF Components (6 of 6)
• PCS Rx bandpass filter– Reference design used Murata Erie SAFEB1G96FL0F00– Key performance requirements:
» Insertion loss: < 3.0 dB» Attenuation 10 to 1850 MHz, PCS Tx: 30, 23 dB» Amplitude and phase imbalance: see curve
• AWS Rx bandpass filter– Reference design used Murata
Erie SAFEB2G14FB0F00– Key performance requirements:
» Insertion loss: < 2.5 dB» Attenuation 10 to 1710 MHz,
AWS Tx: 30, 35 dB» Amplitude and phase
imbalance: see curve
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com
QUALCOMM Confidential and Proprietary80-VC881-22 Rev. A
April 2007Page 37
RF Transmitter or RF Component Questions?
! Also, you can submit questions to https://support.cdmatech.com at any time.
david
_tai-
com
pal.co
m
2007
.05.28
at 00
:12:
22 P
DT
www.DataSheet4U.com