LT1881/LT1882

1

18812fa

The LT

input performance to amplifiers with rail-to-rail output

swing. Input bias currents and capacitive load driving

capabilities are superior to the similar LT1884 and LT1885

amplifiers, at the cost of a slight loss in speed. Input

offset voltage is trimmed to less than 50

μV and the low

drift maintains this accuracy over the operating tempera-

ture range. Input bias currents are an ultralow 200pA

maximum.

The amplifiers work on any total power supply voltage

between 2.7V and 36V (fully specified from 5V to

±15V).

Output voltage swings to within 40mV of the negative

supply and 220mV of the positive supply make these

amplifiers good choices for low voltage single supply

operation.

Capacitive loads up to 1000pF can be driven directly in

unity-gain follower applications.

The dual LT1881 and LT1881A are available with standard

pinouts in S8 and PDIP packages. The quad LT1882 is in

a 14-pin SO package. For a higher speed device with

similar DC specifications, see the LT1884/LT1885.

μV Maximum (LT1881A)

μV/°C Maximum

Dual and Quad

Rail-to-Rail Output,

Picoamp Input Precision Op Amps

–5V

5V

33pF

– 4.096V

TO 4.096V

LTC

DAC

–

+

LT1881

+

–

LT1881

1881/2 TA01

–5V

REF

R1

5V

1.65k

LT1634

4.096V

5V

16-Bit Voltage Output DAC on

±5V Supply

INPUT OFFSET VOLTAGE DRIFT (

μV/°C)

1

–0.8

–0.6

–0.4

–0.2

0

0.2

0.4

0.6

0.8

–0.9

–0.7

–0.5

–0.3

–0.1

0.1

0.3

0.5

0.7

0.9 1

1881/2 TA01a

26

24

22

20

18

16

14

12

10

8

6

4

2

0

40 N8 (1 LOT)

144 S8 (2 LOTS)

184 TOTAL PARTS

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.