LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL

OPERATIONAL AMPLIFIERS

Micro

FEATURES

q RAIL-TO-RAIL INPUT

q RAIL-TO-RAIL OUTPUT (within 1mV)

q LOW QUIESCENT CURRENT: 150

SOT23-5

MSOP-8

TSSOP-14

q GAIN-BANDWIDTH

OPA344: 1MHz, G

OPA345: 3MHz, G

q SLEW RATE

OPA344: 0.8V/

OPA345: 2V/

q THD + NOISE: 0.006%

APPLICATIONS

q PCMCIA CARDS

q DATA ACQUISITION

q PROCESS CONTROL

q AUDIO PROCESSING

q COMMUNICATIONS

q ACTIVE FILTERS

q TEST EQUIPMENT

DESCRIPTION

The OPA344 and OPA345 series rail-to-rail CMOS

operational amplifiers are designed for precision, low-power,

miniature applications. The OPA344 is unity gain stable,

while the OPA345 is optimized for gains greater than or equal

to five, and has a gain-bandwidth product of 3MHz.

The OPA344 and OPA345 are optimized to operate on a

single supply from 2.5V and up to 5.5V with an input

common-mode voltage range that extends 300mV

beyond the supplies. Quiescent current is only

250

µA (max).

Rail-to-rail input and output make them ideal for driving

sampling analog-to-digital converters. They are also well suited

for general purpose and audio applications and providing I/V

conversion at the output of D/A converters. Single, dual and

quad versions have identical specs for design flexibility.

A variety of packages are available. All are specified for

operation from –40ºC to 85ºC. A SPICE macromodel for

design analysis is available for download from www.ti.com.

OPA345

OPA2345

OPA4345

OPA344

OPA2344

OPA4344

1

2

3

5

4

V+

–In

Out

V–

+In

OPA344, OPA345

SOT23-5

1

2

3

4

8

7

6

5

NC

V+

Out

NC

NC

–In

+In

V–

OPA344, OPA345

SO-8, 8-Pin DIP (OPA344 Only)

1

2

3

4

8

7

6

5

V+

Out B

–In B

+In B

Out A

–In A

+In A

V–

OPA2344, OPA2345

SO-8, MSOP-8, 8-Pin DIP (OPA2344 Only)

A

B

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

OPA4344, OPA4345

TSSOP-14, SO-14, 14-PIn DIP (OPA4344 Only)

AD

BC

®

OPA3

42

OPA4

344

OPA3

44

OPA

345

www.ti.com

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 © 2000-2008, 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.

SBOS107A – APRIL 2000 – REVISED AUGUST 2008