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LT1112/LT1114

DESCRIPTIO

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FEATURE

Dual/Quad Low Power

Precision, Picoamp Input Op Amps

The LT1112 dual and LT1114 quad op amps achieve a new

standard in combining low cost and outstanding precision

specifications.

The performance of the selected prime grades matches or

exceeds competitive devices. In the design of the LT1112/

LT1114 however, particular emphasis has been placed on

optimizing performance in the low cost plastic and SO

packages. For example, the 75

µV maximum offset voltage

in these low cost packages is the lowest on any dual or

quad non-chopper op amp.

The LT1112/LT1114 also provide a full set of matching

specifications, facilitating their use in such matching

dependent applications as two and three op amp instru-

mentation amplifiers.

Another set of specifications is furnished at

±1V supplies.

This, combined with the low 320

µA supply current per

amplifier, allows the LT1112/LT1114 to be powered by

two nearly discharged AA cells.

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S8 Package – Standard Pinout

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Offset Voltage – Prime Grade: 60

µV Max

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Offset Voltage – Low Cost Grade

(Including Surface Mount Dual/Quad): 75

µV Max

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Offset Voltage Drift: 0.5

µV/°C Max

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Input Bias Current: 250pA Max

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0.1Hz to 10Hz Noise: 0.3

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Supply Current per Amplifier: 400

µA Max

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CMRR: 120dB Min

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Voltage Gain: 1 Million Min

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Guaranteed Specs with

±1.0V Supplies

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Guaranteed Matching Specifications

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LT1114 in Narrow Surface Mount Package

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APPLICATI

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Picoampere/Microvolt Instrumentation

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Two and Three Op Amp Instrumentation Amplifers

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Thermocouple and Bridge Amplifiers

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Low Frequency Active Filters

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Photo Current Amplifiers

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Battery-Powered Systems

Protected by U.S. Patents 4,575,685; 4,775,884 and 4,837,496

Distribution of Input Offset Voltage

(In All Packages)

INPUT OFFSET VOLTAGE (

µV)

–70

20

25

30

–10

30

15

10

–50

–30

10

50

70

5

0

LT1112/14 • TA02

1/2 LT1112

1/2 LT1112

LT1004-1.2

75k

0.1%

46.4k

0.1%

2

3

6

5

4

7

8

1

0.765V

15k

3V

2.000V

LT1112/14 • TA01

TOTAL SUPPLY CURRENT = 700

µA

2V REFERENCE: SOURCES 1.7mA, SINKS 5mA

CURRENT TO 5mA

0.765V REFERENCE: SOURCES 5mA,

SINKS 0.5mA

TEMPERATURE COEFFICIENT LIMITED

BY REFERENCE = 20ppm/°C

MINIMUM SUPPLY = 2.7V

Dual Output, Buffered Reference (On Single 3V Supply)