High Precision

OPERATIONAL AMPLIFIERS

OPA277

OPA2277

OPA4277

SBOS079A – MARCH 1999 – REVISED APRIL 2005

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 1999-2005, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

DESCRIPTION

The OPA277 series precision op amps replace the industry

standard OP-177. They offer improved noise, wider output

voltage swing, and are twice as fast with half the quiescent

current. Features include ultra low offset voltage and drift, low

bias current, high common-mode rejection, and high power

supply rejection. Single, dual, and quad versions have identical

specifications for maximum design flexibility.

OPA277 series op amps operate from

±2V to ±18V supplies with

excellent performance. Unlike most op amps which are specified

at only one supply voltage, the OPA277 series is specified for

real-world applications; a single limit applies over the

±5V to

±15V supply range. High performance is maintained as the

amplifiers swing to their specified limits. Because the initial offset

voltage (

±20µV max) is so low, user adjustment is usually not

required. However, the single version (OPA277) provides exter-

nal trim pins for special applications.

OPA277 op amps are easy to use and free from phase inversion

and overload problems found in some other op amps. They are

stable in unity gain and provide excellent dynamic behavior over

a wide range of load conditions. Dual and quad versions feature

completely independent circuitry for lowest crosstalk and free-

dom from interaction, even when overdriven or overloaded.

Single (OPA277) and dual (OPA2277) versions are available

in DIP-8, SO-8, and DFN-8 (4mm x 4mm) packages. The quad

(OPA4277) comes in DIP-14 and SO-14 surface-mount pack-

ages. All are fully specified from –40

°C to +85°C and operate

from –55

°C to +125°C.

FEATURES

q ULTRA LOW OFFSET VOLTAGE: 10

q ULTRA LOW DRIFT:

q HIGH OPEN-LOOP GAIN: 134dB

q HIGH COMMON-MODE REJECTION: 140dB

q HIGH POWER SUPPLY REJECTION: 130dB

q LOW BIAS CURRENT: 1nA max

q WIDE SUPPLY RANGE:

q LOW QUIESCENT CURRENT: 800

q SINGLE, DUAL, AND QUAD VERSIONS

q REPLACES OP-07, OP-77, OP-177

1

2

3

4

5

6

7

14

13

12

11

10

9

8

Out D

–In D

+In D

V–

+In C

–In C

Out C

Out A

–In A

+In A

V+

+In B

–In B

Out B

OPA4277

14-Pin DIP, SO-14

AD

BC

1

2

3

4

8

7

6

5

V+

Out B

–In B

+In B

Out A

–In A

+In A

V–

OPA2277

8-Pin DIP, SO-8

A

B

APPLICATIONS

q TRANSDUCER AMPLIFIER

q BRIDGE AMPLIFIER

q TEMPERATURE MEASUREMENTS

q STRAIN GAGE AMPLIFIER

q PRECISION INTEGRATOR

q BATTERY POWERED INSTRUMENTS

q TEST EQUIPMENT

1

2

3

4

8

7

6

5

Offset Trim

V+

Output

NC

Offset Trim

–In

+In

V–

OPA277

8-Pin DIP, SO-8

1

2

3

4

Offset Trim

−In

+In

V

−

8

7

6

5

Offset Trim

Pin 1

Indicator

OPA277AIDRM

DFN-8 4mm x 4mm

(top view)

V+

Output

Thermal Pad

on Bottom

(Connect to V

−)

NC

1

2

3

4

Out A

−In A

+In A

V

−

8

7

6

5

Out B

Pin 1

Indicator

OPA2277AIDRM

DFN-8 4mm x 4mm

(top view)

V+

−In B

Thermal Pad

on Bottom

(Connect to V

−)

+In B

OPA2

77

OPA2

277

OPA277

OPA2277

OPA42

77

OPA4277

OPA2

277

OPA2

77

NC = No connection.