1

LTC2051

Dual Zero-Drift

Operational Amplifier

February 2000

s

Thermocouple Amplifiers

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Electronic Scales

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Medical Instrumentation

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Strain Gauge Amplifiers

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High Resolution Data Acquisition

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DC Accurate RC Active Filters

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APPLICATI

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Maximum Offset Voltage of 3

µV

s

Maximum Offset Voltage Drift of 30nV/

°C

s

Small Footprint, Low Profile MS8 Package

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Noise: 1.5

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Voltage Gain: 140dB (Typ)

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PSRR: 130dB (Typ)

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CMRR: 130dB (Typ)

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Supply Current: 0.75mA (Typ) per Amplifier

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Single Supply Operation: 2.7V to 11V

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Extended Common Mode Input Range

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Output Swings Rail-to-Rail

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Overload Recovery Time: 2ms (Typ)

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Operating Temperature Range –40

°C to 85°C

S

FEATURE

DESCRIPTIO

The LTC

available in the MS8 and SO-8 packages. It operates from

a single 2.7V supply while still supporting

±5V applica-

tions. The power consumption is 750

µA per op amp.

The LTC2051, despite its miniature size, features uncom-

promising DC performance. The typical input offset volt-

age and offset drift are 0.5

µV and 10nV/°C. The almost

zero DC offset and drift are supported with a power supply

rejection ratio (PSRR) and common mode rejection ratio

(CMRR) of more than 130dB.

The input common mode voltage ranges from the negative

supply up to 1V from the positive supply. The LTC2051

also has an enhanced output stage capable of driving

loads as low as 1k

Ω to both supply rails. The open-loop

gain, loaded with 1k

Ω,isinexcessof140dB.TheLTC2051

also features a 1.5

bandwidth product.

Input Referred Noise 0.1Hz to 10Hz

High Performance Low Cost Instrumentation Amplifier

APPLICATI

TYPICAL

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

TIME (s)

0

3

1

8

LT2051 TA02

0

–1

–3

2

4

6

10

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.

–

+

R2

100k

0.1%

R1

499

Ω

0.1%

7

4

5

6

3

2

2051 TA01

–5V

–

+

1/2

LTC2051HV

1/2

LTC2051HV

8

1

5V

R2

100k

0.1%

R1

499

Ω

0.1%

Final Electrical Specifications