LT1881/LT1882

1

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

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.

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Thermocouple Amplifiers

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Bridge Transducer Conditioners

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Instrumentation Amplifiers

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Battery-Powered Systems

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Photo Current Amplifiers

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

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Offset Voltage: 50

µV Maximum (LT1881A)

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Input Bias Current: 200pA Maximum (LT1881A)

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Offset Voltage Drift: 0.8

µV/°C Maximum

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Rail-to-Rail Output Swing

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Supply Range: 2.7V to 36V

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Operates with Single or Split Supplies

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Open-Loop Voltage Gain: 1 Million Minimum

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1mA Maximum Supply Current Per Amplifier

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Standard Pinouts

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

Dual and Quad

Rail-to-Rail Output,

Picoamp Input Precision Op Amps

April 2000

Final Electrical Specifications

–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