low-noise high-speed precision operational-amplifier (rev. c) · low-noise high-speed precision...

OP27A, OP27C, OP27E, OP27GOP37A, OP37C, OP37E, OP37G

LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL-AMPLIFIER

SLOS100C – FEBRUARY 1989 – REVISED SEPTEMBER 2000

1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Direct Replacements for PMI and LTC OP27and OP37 Series

Features of OP27A, OP27C, OP37A, andOP37C: Maximum Equivalent Input Noise Voltage:

3.8 nV/√Hz at 1 kHz5.5 nV/√Hz at 10 kHz

Very Low Peak-to-Peak Noise Voltage at0.1 Hz to 10 Hz . . . 80 nV Typ

Low Input Offset Voltage . . . 25 µV Max

High Voltage Amplification . . . 1 V/µV Min

Feature of OP37 Series: Minimum Slew Rate . . . 11 V/µs

description

The OP27 and OP37 operational amplifierscombine outstanding noise performance withexcellent precision and high-speed specifica-tions. The wideband noise is only 3 nV/√Hz andwith the 1/f noise corner at 2.7 Hz, low noise ismaintained for all low-frequency applications.

The outstanding characteristics of the OP27 andOP37 make these devices excellent choicesfor low-noise amplifier applications requiringprecision performance and reliability. Additionally,the OP37 is free of latch-up in high-gain,large-capacitive-feedback configurations.

The OP27 series is compensated for unity gain.The OP37 series is decompensated for increasedbandwidth and slew rate and is stable down to again of 5.

The OP27A, OP27C, OP37A, and OP37C are characterized for operation over the full military temperaturerange of –55°C to 125°C. The OP27E, OP27G, OP37E, and OP37G are characterized for operation from – 25°Cto 85°C.

AVAILABLE OPTIONS

VIOmax STABLEPACKAGE

TAVIOmaxAT 25°C

STABLEGAIN CERAMIC DIP

(JG)CHIP CARRIER

(FK)PLASTIC DIP

(P)

25 µV1 — — OP27EP

25°C to 85°C

25 µV5 — — OP37EP

–25°C to 85°C

100 µV1 — — OP27GP

100 µV5 — — OP37GP

25 µV1 OP27AJG OP27AFK —

55°C to 125°C

25 µV5 OP37AJG OP37AFK —

–55°C to 125°C

100 µV1 OP27CJG — —

100 µV5 OP37CJG — —

Copyright 2000, Texas Instruments IncorporatedPRODUCTION DATA information is current as of publication date.Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily includetesting of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

4

8

7

6

5

VIOTRIMIN–IN +

VCC –

VIOTRIMVCC+OUTNC

JG OR P PACKAGE(TOP VIEW)

IN+

IN –

OUT

VIO TRIM1 8

6

3

2

symbol

3 2 1 20 19

9 10 11 12 13

4

5

6

7

8

18

17

16

15

14

NCVCC+NCOUTNC

NC1N–NCIN+NC

FK PACKAGE(TOP VIEW)

NC

NC

NC

NC

NC

NC

NC – No internal connection

CC

–V

Pin numbers are for the JG and P packages.

IOV

TR

IM

+

–

NC

IOV

TR

IM

OP27A, O

P27C, OP27E, O

P27GO

P37A, OP37C, O

P37E, OP37G

LOW

-NOISE HIG

H-SPEED PRECISION O

PERATIONAL-AM

PLIFIER

Template R

elease Date: 7–11–94

SLO

S100C

– FE

BR

UA

RY

1989 – RE

VIS

ED

SE

PT

EM

BE

R 2000

2P

OS

T O

FF

ICE

BO

X 655303 D

ALLA

S, T

EX

AS

75265•

schematic

IN +

IN –

Q3

Q1A

Q1B Q2B Q2A

Q11

Q12

Q27 Q28

Q26

Q46

Q19

Q20

Q45

Q22

Q24Q23

Q21

Q6

VIO TRIM VIO TRIM

VCC +

OUT

VCC –

480 µA 750µA

260µA

240 µA 120µA

340µA

C1†

† C1 = 120 pF for OP27C1 = 15 pF for OP37





absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, VCC+ (see Note 1) 22 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Supply voltage, VCC– (see Note 1) – 22 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI VCC±. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Duration of output short circuit unlimited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Differential input current (see Note 2) ±25 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range: OP27A, OP27C, OP37A, OP37C – 55°C to 125°C. . . . . . . . . . . . . . .

OP27E, OP27G, OP37E, OP37G – 25°C to 85°C. . . . . . . . . . . . . . . . Storage temperature range – 65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG or FK package 300°C. . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: P package 260°C. . . . . . . . . . . . . . . . . . . . .

NOTES: 1. All voltage values are with respect to the midpoint between VCC+ and VCC– unless otherwise noted.2. The inputs are protected by back-to-back diodes. Current-limiting resistors are not used in order to achieve low noise. Excessive

input current will flow if a differential input voltage in excess of approximately ± 0.7 V is applied between the inputs unless somelimiting resistance is used.

DISSIPATION RATING TABLE

PACKAGETA ≤ 25°C

POWER RATINGDERATING FACTORABOVE TA = 25°C

TA = 85°CPOWER RATING

TA = 125°CPOWER RATING

JGFKP

1050 mW1375 mW1000 mW

8.4 mW/°C11.0 mW/°C8.0 mW/°C

546 mW715 mW520 mW

210 mW275 mW

N/A

OP27A, OP27C, OP27E, OP27GOP37A, OP37C, OP37E, OP37GLOW-NOISE HIGH-SPEED PRECISION OPERATIONAL-AMPLIFIER


4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

recommended operating conditions

OP27A, OP37A OP27C, OP37CUNIT

MIN NOM MAX MIN NOM MAXUNIT

Supply voltage, VCC+ 4 15 22 4 15 22 V

Supply voltage, VCC– –4 –15 –22 –4 –15 –22 V

Common mode input voltage VICVCC± = ± 15 V, TA = 25°C ± 11 ±11

VCommon-mode input voltage, VICVCC± = ± 15 V, TA = – 55°C to 125°C ±10.3 ±10.2

V

Operating free-air temperature, TA –55 125 –55 125 °C

electrical characteristics at specified free-air temperature, V CC± = ±15 V (unless otherwise noted)

PARAMETER TEST CONDITIONS T †OP27A, OP37A OP27C, OP37C

UNITPARAMETER TEST CONDITIONS TA†MIN TYP MAX MIN TYP MAX

UNIT

VIO Input offset voltageVO = 0, VIC = 0 25°C 10 25 30 100

µVVIO Input offset voltage O , ICRS = 50 Ω, See Note 3 Full range 60 300

µV

αVIO

Average temperaturecoefficient of inputoffset voltage

Full range 0.2 0.6 0.4 1.8 µV/°C

Long-term drift of inputoffset voltage

See Note 4 0.2 1 0.4 2 µV/mo

IIO Input offset current VO = 0 VIC = 025°C 7 35 12 75

nAIIO Input offset current VO = 0, VIC = 0Full range 50 135

nA

IIB Input bias current VO = 0 VIC = 025°C ±10 ±40 ±15 ±80

nAIIB Input bias current VO = 0, VIC = 0Full range ±60 ±150

nA

VICRCommon-mode input

25°C11to

–11

11to

–11VVICR voltage range

Full range10.3

to–10.3

10.5to

–10.5

V

RL ≥ 2 kΩ ±12 ±13.8 ±11.5 ±13.5

VOM Peak output voltage swing RL ≥ 0.6 kΩ ±10 ±11.5 ±10 ±11.5 V

RL ≥ 2 kΩ Full range ±11.5 10.5

RL ≥ 2 kΩ, VO = ±10 V 1000 1800 700 1500

Large signal differentialRL ≥ 1 kΩ, VO = ±10 V 800 1500 1500

AVDLarge-signal differentialvoltage amplification RL ≥ 0.6 kΩ, VO = ±1 V,

VCC± = ± 4 V250 700 200 500

V/mV

RL ≥ 2 kΩ, VO = ±10 V Full range 600 300

ri(CM)Common-mode inputresistance

3 2 GΩ

ro Output resistance VO = 0, IO = 0 25°C 70 70 Ω

CMRRCommon-mode rejection VIC = ±11 V 25°C 114 126 100 120

dBCMRRj

ratio VIC = ±10 V Full range 110 94dB

kSVRSupply voltage rejection VCC± = ±4 V to ±18 V 25°C 100 120 94 118

dBkSVRy g j

ratio VCC± = ±4.5 V to ±18 V Full range 96 86dB

† Full range is – 55°C to 125°C.NOTES: 3. Input offset voltage measurements are performed by automatic test equipment approximately 0.5 seconds after applying power.

4. Long-term drift of input offset voltage refers to the average trend line of offset voltage versus time over extended periods after thefirst 30 days of operation. Excluding the initial hour of operation, changes in VIO during the first 30 days are typically 2.5 µV(see Figure 3).





recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, VCC+ 4 15 22 V

Supply voltage, VCC – –4 –15 –22 V

Common mode input voltage VICVCC± = ±15 V, TA = 25°C ±11

VCommon-mode input voltage, VICVCC± = ±15 V, TA = – 55°C to 125°C ±10.5

V

Operating free-air temperature, TA –25 85 °C

electrical characteristics at specified free-air temperature, V CC± = ±15 V (unless otherwise noted)

PARAMETER TEST CONDITIONS T †OP27E, OP37E OP27G, OP37G

UNITPARAMETER TEST CONDITIONS TA†MIN TYP MAX MIN TYP MAX

UNIT

VIO Input offset voltageVO = 0, VIC = 0 25°C 10 25 30 100

µVVIO Input offset voltage O , ICRS = 50 Ω, See Note 3 Full range 60 220

µV

αVIO

Average temperature coefficient of inputoffset voltage

Full range 0.2 0.6 0.4 1.8 µV/°C

Long-term drift of inputoffset voltage

See Note 4 0.2 1 0.4 2 µV/mo

IIO Input offset current VO = 0 VIC = 025°C 7 35 12 75

nAIIO Input offset current VO = 0, VIC = 0Full range 50 135

nA

IIB Input bias current VO = 0 VIC = 025°C ±10 ±40 ±15 ±80

nAIIB Input bias current VO = 0, VIC = 0Full range ±60 ±150

nA

VICRCommon-mode input

25°C11to

–11

11to

–11VVICR voltage range

Full range10.3

to–10.3

10.5to

–10.5

V

P k t t ltRL ≥ 2 kΩ ±12 ±13.8 ±11.5 ±13.5

VOMPeak output voltageswing

RL ≥ 0.6 kΩ ±10 ±11.5 ±10 ±11.5 Vswing

RL ≥ 2 kΩ Full range ±11.5 10.5

RL ≥ 2 kΩ, VO = ±10 V 1000 1800 700 1500

Large signal differentialRL ≥ 1 kΩ, VO = ±10 V 800 1500 1500

AVDLarge-signal differentialvoltage amplification RL ≥ 0.6 kΩ, VO = ±1 V,

VCC± = ± 4 V250 700 200 500

V/mV

RL ≥ 2 kΩ, VO = ± 10 V Full range 600 450

ri(CM)Common-mode inputresistance

3 2 GΩ

ro Output resistance VO = 0, IO = 0 25°C 70 70 Ω

CMRRCommon-mode rejection VIC = ±11 V 25°C 114 126 100 120

dBCMRRj

ratio VIC = ±10 V Full range 110 96dB

kSVRSupply voltage rejection VCC± = ± 4 V to ±18 V 25°C 100 120 94 118

dBkSVRy g j

ratio VCC± = ± 4.5 V to ±18 V Full range 96 90dB

† Full range is – 25°C to 85°C.NOTES: 3. Input offset voltage measurements are performed by automatic test equipment approximately 0.5 seconds after applying power.

4. Long-term drift of input offset voltage refers to the average trend line of offset voltage versus time over extended periods after thefirst 30 days of operation. Excluding the initial hour of operation, changes in VIO during the first 30 days are typically 2.5 µV(see Figure 3).




OP27 operating characteristics over operating free-air temperature range, V CC± = ±15 V

PARAMETER TEST CONDITIONSOP27A, OP27E OP27C, OP27G

UNITPARAMETER TEST CONDITIONSMIN TYP MAX MIN TYP MAX

UNIT

SR Slew rate AVD ≥ 1, RL ≥ 2 kΩ 1.7 2.8 1.7 2.8 V/µs

VN(PP)Peak-to-peak equivalentinput noise voltage

f = 0.1 Hz to 10 Hz, RS = 20 Ω,See Figure 34

0.08 0.18 0.09 0.25 µV

f = 10 Hz, RS = 20 Ω 3.5 5.5 3.8 8

Vn Equivalent input noise voltage f = 30 Hz, RS = 20 Ω 3.1 4.5 3.3 5.6 nV/√Hz

f = 1 kHz, RS = 20 Ω 3 3.8 3.2 4.5

f = 10 Hz, See Figure 35 1.5 4 1.5

In Equivalent input noise current f = 30 Hz, See Figure 35 1 2.3 1 pA/√Hz

f = 1 kHz, See Figure 35 0.4 0.6 0.4 0.6

Gain-bandwidth product f = 100 kHz 5 8 5 8 MHz

OP37 operating characteristics over operating free-air temperature range, V CC± = ±15 V

PARAMETER TEST CONDITIONSOP37A, OP37E OP37C, OP37G

UNITPARAMETER TEST CONDITIONSMIN TYP MAX MIN TYP MAX

UNIT

SR Slew rate AVD ≥ 5, RL ≥ 2 kΩ 11 17 11 17 V/µs

VN(PP)Peak-to-peak equivalentinput noise voltage

f = 0.1 Hz to 10 Hz, RS = 20 Ω,See Figure 34

0.08 0.18 0.09 0.25 µV

E i l t i t if = 10 Hz, RS = 20 Ω 3.5 5.5 3.8 8

VnEquivalent input noisevoltage

f = 30 Hz, RS = 20 Ω 3.1 4.5 3.3 5.6 nV/√Hzvoltagef = 1 kHz, RS = 20 Ω 3 3.8 3.2 4.5

f = 10 Hz, See Figure 35 1.5 4 1.5

In Equivalent input noise current f = 30 Hz, See Figure 35 1 2.3 1 pA/√Hz

f = 1 kHz, See Figure 35 0.4 0.6 0.4 0.6

Gain bandwidth productf = 10 kHz 45 63 45 63

MHzGain-bandwidth productAV ≥ 5, f = 1 MHz 40 40

MHz





TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

VIO Input offset voltage vs Temperature 1

∆VIO Change in input offset voltagevs Time after power onvs Time (long-term drift)

23

IIO Input offset current vs Temperature 4

IIB Input bias current vs Temperature 5

VICR Common-mode input voltage range vs Supply voltage 6

VOM Maximum peak output voltage vs Load resistance 7

VO(PP) Maximum peak-to-peak output voltage vs Frequency 8, 9

AVD Differential voltage amplificationvs Supply voltagevs Load resistancevs Frequency

1011

12, 13, 14

CMRR Common-mode rejection ratio vs Frequency 15

kSVR Supply voltage rejection ratio vs Frequency 16

SR Slew ratevs Temperaturevs Supply voltagevs Load resistance

171819

φm Phase margin vs Temperature 20, 21

φ Phase shift vs Frequency 12, 13

Vn Equivalent input noise voltage

vs Bandwidthvs Source resistancevs Supply voltagevs Temperaturevs Frequency

2223242526

In Equivalent input noise current vs Frequency 27

Gain-bandwidth product vs Temperature 20, 21

IOS Short-circuit output current vs Time 28

ICC Supply current vs Supply voltage 29

Pulse responseSmall signalLarge signal

30, 3231, 33




TYPICAL CHARACTERISTICS †

100

80

60

40

20

0

– 20

– 40

– 60

– 80

– 100– 50 – 25 0 25 50 75 100 125

– In

put O

ffset

Vol

tage

–

V

TA – Free-Air Temperature – °C

INPUT OFFSET VOLTAGE OFREPRESENTATIVE INDIVIDUAL UNITS

vsFREE-AIR TEMPERATURE

VCC± = ±15 V

10

5

0

WARM-UP CHANGE ININPUT OFFSET VOLTAGE

vsELAPSED TIME

1 2 3 4 5

Time After Power On – minutes

IOµV

∆V

IO –

Cha

nge

in In

put O

ffset

Vol

tage

–

Vµ

VCC± = ±15 VTA = 25°C

OP27CP/GPOP37CP/GP

OP27C/37C

OP27A/37AOP27A/37A

OP27E/37E

OP27C/37COP27G/37G OP27AP/EP

OP37AP/EP

Figure 1 Figure 2

LONG-TERM DRIFT OF INPUT OFFSET VOLTAGE OFREPRESENTATIVE INDIVIDUAL UNITS

6

2

4

0

– 2

– 4

– 60 1 2 3 4 5 6 7 8

Time – months

0.2-µV/mo Trend Line

0.2-µV/mo Trend Line

∆V

IO –

Cha

nge

in In

put O

ffset

Vol

tage

–

Vµ

Figure 3

† Data for temperatures below – 25°C and above 85°C are applicable to the OP27A, OP27C, OP37A, and OP37C only.






INPUT OFFSET CURRENTvs

FREE-AIR TEMPERATURE

– In

put O

ffset

Cur

rent

– n

A


50

40

30

20

10

0– 75 – 50 – 25 0 50 75 100 12525

VCC± = ±15 V

OP27C/GOP37C/G

OP27A/EOP37A/E

INPUT BIAS CURRENTvs



± 50

± 40

± 30

± 20

± 10

0– 50 – 25 0 50 75 100 12525

I IO

– In

put B

ias

Cur

rent

– n

AI I

B– 75

OP27C/GOP37C/G

OP27A/EOP37A/E

VCC± = ±15 V

Figure 4 Figure 5

20

COMMON-MODE INPUT VOLTAGE RANGE LIMITSvs

SUPPLY VOLTAGE

0 ±5 ±10 ±15 ±20

VCC+ – Supply Voltage – V

VIC

R –

Com

mon

-Mod

e In

put V

olta

ge R

ange

Lim

its –

V

TA = –55°C

TA = 125°C

TA = – 55°C

TA = 125°C

TA = 25°C

TA = 25°C

– M

axim

um P

eak

Out

put V

olta

ge –

VV O

M

MAXIMUM PEAK OUTPUT VOLTAGEvs

LOAD RESISTANCE

18

16

14

12

10

8

6

4

2

00.1 1 10

RL – Load Resistance – k Ω

16

12

8

4

0

– 4

– 8

– 12

– 16

VCC ± = ± 15 VTA = 25°C

PositiveSwing

NegativeSwing

ÁÁÁÁÁÁ

VIC

R

Figure 6 Figure 7






1 k

V

OP27MAXIMUM PEAK-TO-PEAK

OUTPUT VOLTAGEvs

FREQUENCY

OP

P –

Max

imum

Pea

k-to

-Pea

k O

utpu

t Vol

tage

– V

28

24

20

16

12

8

4

10 k 100 k 1 M 10 Mf – Frequency – Hz

010 k

OP37MAXIMUM PEAK-TO-PEAK

OUTPUT VOLTAGEvs

FREQUENCY28

24

20

16

12

8

4

100 k 1 M 10 Mf – Frequency – Hz

0

ÁÁÁÁÁÁÁÁÁÁÁÁ

V O(P

P)

VO

PP

– M

axim

um P

eak-

to-P

eak

Out

put V

olta

ge –

VÁÁÁÁÁÁÁÁ

V O(P

P)

VCC ± = ± 15 VRL = 1 kΩTA = 25°C

VCC ± = ± 15 VRL = 1 kΩTA = 25°C

Figure 8 Figure 9

24002500

10

OP27A, OP27E, OP37A, OP37ELARGE-SIGNAL

DIFFERENTIAL VOLTAGE AMPLIFICATIONvs

TOTAL SUPPLY VOLTAGE

A



LOAD RESISTANCE

VD

– D

iffer

entia

l Vol

tage

Am

plifi

catio

n –

V/m

V

AV

D –

Diff

eren

tial V

olta

ge A

mpl

ifica

tion

– V

/mV

0.1 1 10 100RL – Load Resistance – k ΩVCC+ – VCC – – Total Supply Voltage – V

0 20 30 40 50

2000

1500

1000

500

0

2200

2000

1800

1600

1400

1200

1000

800

600

400

VO = ± 10 VTA = 25°C

RL = 1 kΩ

VCC ± = ± 15 VVO = ± 10 VTA = 25°C

RL = 2 kΩ

Figure 10 Figure 11






1

OP27LARGE-SIGNAL DIFFERENTIAL

VOLTAGE AMPLIFICATION AND PHASE SHIFTvs

FREQUENCY25

20

15

10

5

0

– 5

10 100f – Frequency – Hz

– 100.1

OP37LARGE-SIGNAL DIFFERENTIAL

VOLTAGE AMPLIFICATION AND PHASE SHIFTvs

FREQUENCY60

50

40

30

20

10

0

1 100f – Frequency – MHz

– 10

VCC± =±15 VRL = 1 kΩTA = 25°C

– D

iffer

entia

l Vol

tage

Am

plifi

catio

n –

dBA

VD

80°

100°

120°

140°

160°

180°

200°

220°

– P

hase

Shi

ft

10

80°

100°

120°

140°

160°

180°

200°

220°

Phase Shift

AVD

Phase Shift

AVD

ÁÁÁÁ

φ

– P

hase

Shi

ft

ÁÁ

φ

– D

iffer

entia

l Vol

tage

Am

plifi

catio

n –

dBA

VD

φm = 70°φm = 71°

VCC± = ±15 VRL = 1 kΩTA = 25°C

Figure 12 Figure 13



FREQUENCY

f – Frequency – Hz

VCC± = ±15 VRL = 2 kΩTA = 25°C

CM

RR

– C

omm

on-M

ode

Rej

ectio

n R

atio

– d

B

1 k

OP27A, OP27E, OP37A, OP37ECOMMON-MODE REJECTION RATIO

vsFREQUENCY

140

10 k 100 k 1 M 10 M

f – Frenquency – Hz

40

VCC± = ±15 VVIC = ± 10 VTA = 25°C

120

100

80

60

140

120

100

80

60

40

20

0

–200.1 1 10 100 1 k 10 k 1 M 100 M

– D

iffer

entia

l Vol

tage

Am

plifi

catio

n –

dBA

VD

OP37A/E

OP27A/EOP27A/E

OP37A/E

Figure 14 Figure 15





SUPPLY VOLTAGE REJECTION RATIOvs

FREQUENCY


– S

uppl

y V

olta

ge R

ejec

tion

Rat

io –

dB

k

VCC± = ±4 V to ±18 VTA = 25°C

SLEW RATEvs


TA – Free Air Temperature – °C

VCC± = ±15 VRL ≥ 2 kΩ

OP37(AVD ≥ 5)

SV

R

160

140

120

100

80

60

40

20

0

20

18

16

14

12

10

8

6

4

2

01 10 100 1 k 10 k 100 k 1 M 10 M 100 M – 50 – 25 0 25 50 75 100 125

SR

– S

lew

Rat

e –

V/µ

sOP27(AVD ≥ 1)

PositiveSupply

NegativeSupply

Figure 16 Figure 17

OP37SLEW RATE

vsSUPPLY VOLTAGE

VCC± – Supply Voltage – V

AVD = 5RL = 2 kΩTA = 25°C

SR

– S

lew

Rat

e –

V/

Rise

0.1

OP37SLEW RATE

vsLOAD RESISTANCE

19

1 100f – Frequency – Hz

10

µs

SR

– S

lew

Rat

e –

V/µ

s

20

15

10

5

0

18

17

16

15± 3 ± 6 ± 9 ± 12 ± 15 ± 18 ± 21

Fall

VCC± = ±15 VAVD = 5VO(PP) = 20 VTA = 25°C

Figure 18 Figure 19







OP27PHASE MARGIN AND

GAIN-BANDWIDTH PRODUCTvs


Gai

n-B

andw

idth

Pro

duct

– M

Hz


– 75 – 50 – 25 0 50 75 100 12525

VCC± = ±15 V

GBW (f = 100 kHz)

75°

65°

55°

45°

35°

8.6

8.2

7.8

7.4

7

Φ –

Pha

se M

argi

n

80°

75°

70°

65°

60°

55°

50°

45°

40°

35°

30°– 50 – 25 0 25 50 75 100 125


OP37PHASE MARGIN AND

GAIN-BANDWIDTH PRODUCTvs


GBW (f = 10 kHz)

85

80

75

70

65

60

55

50

45

40

φm

ÁÁÁÁ

mφ

Φ –

Pha

se M

argi

n

ÁÁÁÁ

mφ

φm

VCC± = ±15 V

Gai

n-B

andw

idth

Pro

duct

– M

Hz

80°

70°

60°

50°

40°

85°

10.6

10.2

9.8

9.4

9

11

Figure 20 Figure 21

V

EQUIVALENT INPUT NOISE VOLTAGEvs

BANDWIDTH

VCC± = ±15 VRS = 20 ΩTA = 25°C

nV/

Hz

n –

Equ

ival

ent I

nput

Noi

se V

olta

ge –

Tota

l Equ

ival

ent I

nput

Noi

se V

olta

ge –

µV

10

1

0.1

0.010.1 1 10 100

Bandwidth – kHz(0.1 Hz to frequency indicated)

TOTAL EQUIVALENT INPUT NOISE VOLTAGEvs

SOURCE RESISTANCE

10 k1 k100

100

10

1

RS – Source Resistance – Ω

–

+

RS = R1 + R2

R1

R2

f = 1 kHzResistor Noise Only

f = 10 Hz

VCC± = ±15 VBW = 1 HzTA = 25°C

Figure 22 Figure 23† Data for temperatures below – 25°C and above 85°C are applicable to the OP27A, OP27C, OP37A, and OP37C only.





nV/

Hz

OP27A, OP27E, OP37A, OP37EEQUIVALENT INPUT NOISE VOLTAGE

vsTOTAL SUPPLY VOLTAGE

VCC+ – VCC– – Total Supply Voltage – V

RS = 20 ΩBW = 1 HzTA = 25°C

f = 10 Hz

20

15

10

5

00 10 20 30 40

f = 1 kHz

– 50 – 25 0 25 50 75 100 125



vsFREE-AIR TEMPERATURE

VCC± = ±15 VRS = 20 ΩBW = 1 Hz

5

4

3

2

1

Vn

– E

quiv

alen

t Inp

ut N

oise

Vol

tage

–

nV/

Hz

Vn

– E

quiv

alen

t Inp

ut N

oise

Vol

tage

– f = 10 Hz

f = 1 kHz

Figure 24 Figure 25

nV/

Hz

Vn

– E

quiv

alen

t Inp

ut N

oise

Vol

tage

–

pA/

Hz

I n –

Equ

ival

ent I

nput

Noi

se C

urre

nt –


vsFREQUENCY

1 10 100 1000


EQUIVALENT INPUT NOISE CURRENTvs

FREQUENCY10

1

0.1


1/f Corner = 140 Hz

10987

6

5

4

3

2

1

1/f Corner = 2.7 Hz

10 100 1 k 10 k

VCC± = ±15 VRS = 20 ΩBW = 1 HzTA = 25°C

VCC± = ±15 VBW = 1 HzTA = 25°C

Figure 26 Figure 27







0 1 2 3 4 5

60

50

40

30

20

10

SHORT-CIRCUIT OUTPUT CURRENTvs

ELAPSED TIME

SUPPLY CURRENTvs

TOTAL SUPPLY VOLTAGE

VCC+ – VCC– – Total Supply Voltage – V

TA = 125°C

5

4

3

2

15 15 25 35 45

I CC

– S

uppl

y C

urre

nt –

mA

t – Time – minutes

I OS

– S

hort

-Circ

uit O

utpu

t Cur

rent

– m

A

VCC± = ± 15 VTA = 25°C

IOS+

TA = – 55°CÁÁÁÁ

OS

I

ÁÁÁÁÁÁ

CC

I

IOS–

TA = 25°C

Figure 28 Figure 29

V

OP27VOLTAGE FOLLOWER

SMALL-SIGNALPULSE RESPONSE

80

60

40

20

0

– 20

– 40

– 60

– 80

O –

Out

put V

olta

ge –

mV

t – Time – µs0 0.5 1 1.5 2 2.5 3

VCC± = ±15 VAV = 1CL = 15 pFTA = 25°C

VO

– O

utpu

t Vol

tage

– V

OP27VOLTAGE FOLLOWER

LARGE-SIGNALPULSE RESPONSE

8

6

4

0

– 2

– 4

– 6

– 8

2

t – Time – µs0 2 4 6 8 10 12

VCC ± = ± 15 VAV = – 1TA = 25°C

Figure 30 Figure 31






V

OP37VOLTAGE-FOLLOWER

SMALL-SIGNAL PULSE RESPONSE80

60

40

20

0

– 20

– 40

– 60

– 80

O –

Out

put V

olta

ge –

mV

t – Time – µs0 0.2 0.4 0.6 0.8 1 1.2

VCC± = ±15 VAV = 5CL = 15 pFTA = 25°C

VO

– O

utpu

t Vol

tage

– V

OP37VOLTAGE-FOLLOWER

LARGE-SIGNAL PULSE RESPONSE8

6

4

0

– 2

– 4

– 6

– 8

2

t – Time – µs0 1 2 3 4 5 6

VCC± = ±15 VAV = 5TA = 25°C

Figure 32 Figure 33

APPLICATION INFORMATION

general

The OP27 and OP37 series devices can be inserted directly onto OP07, OP05, µA725, and SE5534 socketswith or without removing external compensation or nulling components. In addition, the OP27 and OP37 canbe fitted to µA741 sockets by removing or modifying external nulling components.

noise testing

Figure 34 shows a test circuit for 0.1-Hz to 10-Hz peak-to-peak noise measurement of the OP27 and OP37.The frequency response of this noise tester indicates that the 0.1-Hz corner is defined by only one zero.Because the time limit acts as an additional zero to eliminate noise contributions from the frequency band below0.1 Hz, the test time to measure 0.1-Hz to 10-Hz noise should not exceed 10 seconds.

Measuring the typical 80-nV peak-to-peak noise performance of the OP27 and OP37 requires the followingspecial test precautions:

1. The device should be warmed up for at least five minutes. As the operational amplifier warms up, theoffset voltage typically changes 4 µV due to the chip temperature increasing from 10°C to 20°C startingfrom the moment the power supplies are turned on. In the 10-s measurement interval, thesetemperature-induced effects can easily exceed tens of nanovolts.

2. For similar reasons, the device should be well shielded from air currents to eliminate the possibility ofthermoelectric effects in excess of a few nanovolts, which would invalidate the measurements.

3. Sudden motion in the vicinity of the device should be avoided, as it produces a feedthrough effect thatincreases observed noise.






noise testing (continued)

4.3 kΩ

110 kΩ2.2 µF

OscilloscopeRin = 1 MΩ

22 µF

100 kΩ

0.1 µF

LT1001

4.7 µF

2 kΩ

100 kΩ

10 Ω

0.1 µF

Voltage Gain = 50,000

+

–

OP27/OP37DeviceUnderTest

24.3 kΩ

0.01 0.1 1 10 100

AV

D –

Diff

eren

tial V

olta

ge A

mpl

ifica

tion

– dB

100

90

80

70

60

50

40

30


+–

NOTE: All capacitor values are for nonpolarized capacitors only.

Figure 34. 0.1-Hz to 10-Hz Peak-to-Peak Noise Test Circuit and Frequency Response





noise testing (continued)

When measuring noise on a large number of units, a noise-voltage density test is recommended. A 10-Hznoise-voltage density measurement correlates well with a 0.1-Hz to 10-Hz peak-to-peak noise reading sinceboth results are determined by the white noise and the location of the 1/f corner frequency.

Figure 35 shows a circuit measuring current noise and the formula for calculating current noise.

+

–

10kΩ

Vno

100 Ω 500 kΩ

500 kΩ[Vno2 – (130 nV)2]1/2

1 MΩ × 100In =

Figure 35. Current Noise Test Circuit and Formula

offset voltage adjustment

The input offset voltage and temperature coefficient of the OP27 and OP37 are permanently trimmed to a lowlevel at wafer testing. However, if further adjustment of VIO is necessary, using a 10-kΩ nulling potentiometeras shown in Figure 36 does not degrade the temperature coefficient αVIO. Trimming to a value other than zerocreates an αVIO of VIO/300 µV/°C. For example, if VIO is adjusted to 300 µV, the change in αVIO is 1 µV/°C.

The adjustment range with a 10-kΩ potentiometer is approximately ±2.5 mV. If a smaller adjustment range isneeded, the sensitivity and resolution of the nulling can be improved by using a smaller potentiometer inconjunction with fixed resistors. The example in Figure 37 has an approximate null range of ±200 µV.

+

–

–15 V

Output

2

37

8

4

1

Input 6

15 V10 kΩ

–15 V

Output

2

37

8

4

1

Input 6

4.7 kΩ

Figure 36. Standard Input OffsetVoltage Adjustment

Figure 37. Input Offset Voltage Adjustment WithImproved Sensitivity

15 V1 kΩ

4.7 kΩ

offset voltage and drift

Unless proper care is exercised, thermoelectric effects caused by temperature gradients across dissimilarmetals at the contacts to the input terminals can exceed the inherent temperature coefficient ∝ VIO of theamplifier. Air currents should be minimized, package leads should be short, and the two input leads should beclose together and at the same temperature.






offset voltage and drift (continued)

The circuit shown in Figure 38 measures offset voltage. This circuit can also be used as the burn-in configurationfor the OP27 and OP37 with the supply voltage increased to 20 V, R1 = R3 = 10 kΩ, R2 = 200 Ω, andAVD = 100.

15 V

+

–

–15 V

R150 kΩ

R2100 Ω

R350 kΩ

VO = 1000 VIO

2

36

7

4

NOTE A: Resistors must have low thermoelectric potential.

Figure 38. Test Circuit for Offset Voltage and Offset Voltage Temperature Coefficient

unity gain buffer applications

The resulting output waveform, when Rf ≤ 100 Ω and the input is driven with a fast large-signal pulse (> 1 V),is shown in the pulsed-operation diagram in Figure 39.

+

–

Rf

Output

2.8 V/µs

OP27

Figure 39. Pulsed Operation

During the initial (fast-feedthrough-like) portion of the output waveform, the input protection diodes effectivelyshort the output to the input, and a current, limited only by the output short-circuit protection, is drawn by thesignal generator. When Rf ≥ 500 Ω, the output is capable of handling the current requirements (loadcurrent ≤ 20 mA at 10 V), the amplifier stays in its active mode, and a smooth transition occurs. WhenRf > 2 kΩ, a pole is created with Rf and the amplifier’s input capacitance, creating additional phase shift andreducing the phase margin. A small capacitor (20 pF to 50 pF) in parallel with Rf eliminates this problem.





unity gain buffer applications (continued)

To GateDrive

#1

+

–

TypicalMultiplexingFET Switches

#2

+

–

#24

+

–

Cold-JunctionCircuitry

+ –

–

+Output

0.05 µF100 kΩ

High-QualitySingle-Point Ground 10 Ω

AVD = 10,000

Type S Thermocouples5.4 µV/°C at 0°C

60

40

20

00 2 4 6

Noi

se V

olta

ge –

nV 80

100

t – Time – seconds

120

8 10

OP27

NOTE A: If 24 channels are multiplexed per second and the output is required to settle to 0.1 % accuracy, the amplifier’s bandwidth cannot belimited to less than 30 Hz. The peak-to-peak noise contribution of the OP27 will still be only 0.11 µV, which is equivalent to an errorof only 0.02°C.

Figure 40. Low-Noise, Multiplexed Thermocouple Amplifier and 0.1-Hz To 10-HzPeak-to-Peak Noise Voltage

PACKAGING INFORMATION

Orderable Device Status (1) PackageType

PackageDrawing

Pins PackageQty

Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)

JM38510/13503BPA ACTIVE CDIP JG 8 1 TBD A42 SNPB N / A for Pkg Type

OP27AFKB ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type

OP27AJGB ACTIVE CDIP JG 8 1 TBD A42 SNPB N / A for Pkg Type

OP27CJGB ACTIVE CDIP JG 8 1 TBD A42 SNPB N / A for Pkg Type

(1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part ina new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.

(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please checkhttp://www.ti.com/productcontent for the latest availability information and additional product content details.TBD: The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirementsfor all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be solderedat high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die andpackage, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHScompatible) as defined above.Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flameretardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak soldertemperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it isprovided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to theaccuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to takereasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis onincoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limitedinformation may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TIto Customer on an annual basis.

PACKAGE OPTION ADDENDUM

www.ti.com 18-Jul-2006

Addendum-Page 1

http://www.ti.com/productcontent

MECHANICAL DATA

MCER001A – JANUARY 1995 – REVISED JANUARY 1997

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE

0.310 (7,87)0.290 (7,37)

0.014 (0,36)0.008 (0,20)

Seating Plane

4040107/C 08/96

5

40.065 (1,65)0.045 (1,14)

8

1

0.020 (0,51) MIN

0.400 (10,16)0.355 (9,00)

0.015 (0,38)0.023 (0,58)

0.063 (1,60)0.015 (0,38)

0.200 (5,08) MAX

0.130 (3,30) MIN

0.245 (6,22)0.280 (7,11)

0.100 (2,54)

0°–15°

NOTES: A. All linear dimensions are in inches (millimeters).B. This drawing is subject to change without notice.C. This package can be hermetically sealed with a ceramic lid using glass frit.D. Index point is provided on cap for terminal identification.E. Falls within MIL STD 1835 GDIP1-T8

MECHANICAL DATA

MLCC006B – OCTOBER 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

FK (S-CQCC-N**) LEADLESS CERAMIC CHIP CARRIER

4040140/D 10/96

28 TERMINAL SHOWN

B

0.358(9,09)

MAX

(11,63)

0.560(14,22)

0.560

0.458

0.858(21,8)

1.063(27,0)

(14,22)

ANO. OF

MINMAX

0.358

0.660

0.761

0.458

0.342(8,69)

MIN

(11,23)

(16,26)0.640

0.739

0.442

(9,09)

(11,63)

(16,76)

0.962

1.165

(23,83)0.938

(28,99)1.141

(24,43)

(29,59)

(19,32)(18,78)

**

20

28

52

44

68

84

0.020 (0,51)

TERMINALS

0.080 (2,03)0.064 (1,63)

(7,80)0.307

(10,31)0.406

(12,58)0.495

(12,58)0.495

(21,6)0.850

(26,6)1.047

0.045 (1,14)

0.045 (1,14)0.035 (0,89)

0.035 (0,89)

0.010 (0,25)

121314151618 17

11

10

8

9

7

5

432

0.020 (0,51)0.010 (0,25)

6

12826 27

19

21B SQ

A SQ22

23

24

25

20

0.055 (1,40)0.045 (1,14)

0.028 (0,71)0.022 (0,54)

0.050 (1,27)

NOTES: A. All linear dimensions are in inches (millimeters).B. This drawing is subject to change without notice.C. This package can be hermetically sealed with a metal lid.D. The terminals are gold plated.E. Falls within JEDEC MS-004

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,enhancements, improvements, and other changes to its products and services at any time and to discontinueany product or service without notice. Customers should obtain the latest relevant information before placingorders and should verify that such information is current and complete. All products are sold subject to TI’s termsand conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale inaccordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TIdeems necessary to support this warranty. Except where mandated by government requirements, testing of allparameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible fortheir products and applications using TI components. To minimize the risks associated with customer productsand applications, customers should provide adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or processin which TI products or services are used. Information published by TI regarding third-party products or servicesdoes not constitute a license from TI to use such products or services or a warranty or endorsement thereof.Use of such information may require a license from a third party under the patents or other intellectual propertyof the third party, or a license from TI under the patents or other intellectual property of TI.

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