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LT1677

Low Noise, Rail-to-Rail

Precision Op Amp

February 2000

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Rail-to-Rail Input and Output

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100% Tested Low Voltage Noise:

3.2nV/

√Hz Typ at 1kHz

4.5nV/

√Hz Max at 1kHz

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Offset Voltage: 60

µV Max

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Low Input Bias Current: 20nA Max

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Wide Supply Range: 3V to

±15V

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High CMRR: 109dB Min

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High PSRR: 108dB Min

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Gain Bandwidth Product: 7.2MHz

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Slew Rate: 2.5V/

µs

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Operating Temperature Range: – 40

°C to 85°C

The LT

able for a rail-to-rail operational amplifier: 3.2nV/

√Hz

wideband noise, 1/f corner frequency of 13Hz and 70nV

peak-to-peak 0.1Hz to 10Hz noise. Low noise is combined

with outstanding precision: 20

µV offset voltage and

0.2

µV/°C drift, 130dB common mode and power supply

rejection and 7.2MHz gain bandwidth product. The com-

mon mode range exceeds the power supply by 100mV.

The voltage gain of the LT1677 is extremely high, especially

with a single supply: 20 million driving a 1k load.

In the design, processing and testing of the device, particular

attention has been paid to the optimization of the entire

distribution of several key parameters. Consequently, the

specifications of even the lowest cost grade have been

spectacularly improved compared to competing rail-to-rail

amplifiers.

Precision High Side Current Sense

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Low Noise Signal Processing

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Microvolt Accuracy Threshold Detection

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Strain Gauge Amplifiers

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Tape Head Preamplifiers

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Direct Coupled Audio Gain Stages

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Infrared Detectors

LT1677

2

7

ZETEX

BC856B

1677 TA01

4

6

3

1k

SOURCE

0.1

Ω

20k

LOAD

= 2V/AMP

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

Final Electrical Specifications

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.

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO