Distributed by: 1-800-831-4242 Jameco Part Number 115318 · 2007-12-19 · The OP27 series is compensated for unity gain. The OP37 series is decompensated for increased bandwidth

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JMendiola

Text Box

Jameco Part Number 115318

OP27A, OP27C, OP27E, OP27G OP37A, OP37C, OP37E, OP37G

LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B – FEBRUARY 1989 – REVISED AUGUST 1994

Copyright 1994, Texas Instruments Incorporated

2–1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443

• 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 specifications.The wideband noise is only 3 nV/√Hz and with the1/f noise corner at 2.7 Hz, low noise is maintainedfor 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 arecharacterized for operation over the full militarytemperature range of –55°C to 125°C. TheOP27E, OP27G, OP37E, and OP37G arecharacterized for operation from – 25°C to 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 — —

PRODUCTION 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.

1

2

3

4

8

7

6

5

VIO TRIMIN–IN +

VCC –

VIO TRIMVCC+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 OPERATIO

NAL AMPLIFIER

SLO

S100B

– FE

BR

UA

RY

1989 – RE

VIS

ED

AU

GU

ST

1994

2–2P

OS

T O

FF

ICE

BO

X 655303 D

ALLA

S, T

EX

AS

75265P

OS

T O

FF

ICE

BO

X 1443 H

OU

ST

ON

, TE

XA

S 77251–1443

••

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



2–3POST OFFICE BOX 655303 • DALLAS, TEXAS 75265POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443

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 AMPLIFIERS

SLOS100B – FEBRUARY 1989 – REVISED AUGUST 1994

2–4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443

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

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 600 450

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

ÁÁÁÁÁÁÁÁ

V O(P

P)

VO

PP

– M

axim

um P

eak-

to-P

eak

Out

put V

olta

ge –

V

ÁÁÁÁÁÁÁÁ

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

s

OP27(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

1V

n –

Equ

ival

ent I

nput

Noi

se V

olta

ge –

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





TYPICAL CHARACTERISTICSV

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. Thefrequency response of this noise tester indicates that the 0.1-Hz corner is defined by only one zero. Becausethe time limit acts as an additional zero to eliminate noise contributions from the frequency band below 0.1 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.





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





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 VoltageTemperature 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.





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

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinueany product or service without notice, and advise customers to obtain the latest version of relevant informationto verify, before placing orders, that information being relied on is current and complete. All products are soldsubject to the terms and conditions of sale supplied at the time of order acknowledgement, including thosepertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale inaccordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extentTI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarilyperformed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OFDEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICALAPPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, ORWARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHERCRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TOBE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operatingsafeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or representthat any license, either express or implied, is granted under any patent right, copyright, mask work right, or otherintellectual property right of TI covering or relating to any combination, machine, or process in which suchsemiconductor products or services might be or are used. TI’s publication of information regarding any thirdparty’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Copyright 1998, Texas Instruments Incorporated

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OP27, Low-Noise Precision High-Speed Operational AmplifierDevice Status: Active

Description

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> Description> Features> Datasheets> Pricing/Samples/Availability> Application Notes> User Manuals> Development Tools> Applications

The OP27 and OP37 operational amplifiers combine outstanding noise performance with excellent precision and high-speed specifications. The wideband noise is only 3 nV/ Hz\ and with the 1/f noise corner at 2.7 Hz, low noise is maintained for all low-frequency applications.

The outstanding characteristics of the OP27 and OP37 make these devices excellent choices for low-noise amplifier applications requiring precision 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 increased bandwidth and slew rate and is stable down to a gain of 5.

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

Features

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Datasheets

Full datasheet in Acrobat PDF: slos100b.pdf (322 KB)Full datasheet in Zipped PostScript: slos100b.psz (295 KB)

Pricing/Samples/Availability

Development Tools

l Direct Replacements for PMI and LTC OP27 and OP37 Series

Features of OP27A, OP27C, OP37A, and OP37C:

l Maximum Equivalent Input Noise Voltage: 3.8 nV/ Hz\ at 1 kHz 5.5 nV/ Hz\ at 10 kHz

l Very Low Peak-to-Peak Noise Voltage at 0.1 Hz to 10 Hz ...80 nV Typ

l Low Input Offset Voltage ...25 uV Max l High Voltage Amplification ...1 V/uV Min

Feature of OP37 Series:

l Minimum Slew Rate ...11 V/us

Orderable Device Package Pins Temp (ºC) Status Price/unitUSD (100-999)

Pack Qty DSCC Number Availability / Samples

JM38510/13503BPA JG 8 -55 TO 125 ACTIVE 21.93 1 Check stock or order

OP27AFKB FK 20 -55 TO 125 ACTIVE 30.06 1 Check stock or order

OP27AJGB JG 8 -55 TO 125 ACTIVE 20.04 1 Check stock or order

OP27CJGB JG 8 -55 TO 125 ACTIVE 11.69 1 Check stock or order

Application Reports

View Application Reports for Operational Amplifiers

l Analog Applications Journal May 2000 (SLYT015 - Updated: 04/20/2000)l Analog Applications Journal, September 1999 edition (SLYT005 - Updated: 07/15/1999)l Analysis Of The Sallen-Key Architecture (SLOA024A - Updated: 07/27/1999)l Electrostatic Discharge Application Note (SSYA008 - Updated: 01/20/1999)l Signal Conditioning Piezoelectric Sensors (SLOA033 - Updated: 09/27/1999)l Signal Conditioning Wheatstone Resistive Bridge Sensors (SLOA034 - Updated: 09/27/1999)l Thermal Characteristics of Linear and Logic Packages Using JEDEC PCB Designs (SZZA017A - Updated: 09/10/1999)

User Manuals

l Universal Op Amp Evaluation Module Selection Guide (SLOU060, 10 KB - Updated: 10/22/1999)l Universal Op Amp Single, Dual, Quad (SOIC) Evaluation Module With Shutdown (SLOU061, 1160 KB - Updated: 10/22/1999)l Universal Operational Amplifier EVM (SLVU006A, 387 KB - Updated: 03/22/1999)l Universal Operational Amplifier Single, Dual, Quad (MSOP/TSSOP) (SLOU055, 1196 KB - Updated: 10/22/1999)l Universal Operational Amplifier Single, Dual, Quad (PDIP) (SLOU062, 1211 KB - Updated: 10/22/1999)

Table Data Updated on: 8/24/2000

Tool Part Number Tool Title Tool Type

UNIV-OPAMP-1B Universal EVM for Single/Dual OpAmps without Shutdown in MSOP/SOIC/SOT-23 packages Evaluation Modules (EVM)

UNIV-OPAMP-2B Universal EVM for Single/Dual OpAmps with Shutdown in MSOP/SOIC/SOT-23 packages Evaluation Modules (EVM)

UNIV-OPAMP-3B Universal EVM for Single/Dual/Quad OpAmps with/without Shutdown in MSOP/TSSOP packages Evaluation Modules (EVM)

UNIV-OPAMP-4B Universal EVM for Single/Dual/Quad OpAmps with/without Shutdown in SOIC packages Evaluation Modules (EVM)

UNIV-OPAMP-5B Universal EVM for Single/Dual/Quad OpAmps with/without Shutdown in PDIP packages Evaluation Modules (EVM)

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Distributed by: 1-800-831-4242 Jameco Part Number 115318 · 2007-12-19 · The OP27 series is compensated for unity gain. The OP37 series is decompensated for increased bandwidth