1 Features

1• Low Offset Voltage: 75 μV (Maximum)

• Zero-Drift: 0.1 μV/°C

• Low Noise: 10 nV/√Hz

• Very Low 1/f Noise

• Excellent DC Precision:

– PSRR: 126 dB

– CMRR: 114 dB

– Open-Loop Gain (AOL): 120 dB

• Quiescent Current: 525 μA (Maximum)

• Wide Supply Range: ±2 V to ±18 V

• Rail-to-Rail Output:

Input Includes Negative Rail

• Low Bias Current: 250 pA (Typical)

• RFI Filtered Inputs

• MicroSIZE Packages

2 Applications

• Bridge Amplifiers

• Strain Gauges

• Test Equipment

• Transducer Applications

• Temperature Measurement

• Electronic Scales

• Medical Instrumentation

• Resister Thermal Detectors

• Precision Active Filters

3 Description

The OPA180, OPA2180 and OPA4180 operational

amplifiers (op amps) use TI's proprietary zero-drift

techniques to simultaneously provide low offset

voltage (75 μV), and near zero-drift over time and

temperature. These miniature, high-precision, lowquiescent-

current op amps offer high input

impedance and rail-to-rail output swing within 18 mV

of the rails. The input common-mode range includes

the negative rail. Single- or dual-supplies ranging

from 4 V to 36 V (±2 V to ±18 V) can be used.

The dual-channel version is offered in VSSOP-8

packages and SOIC-8 packages. The quad-channel

version is offered in SOIC-14 and TSSOP-14

packages. The single and quad package offerings

(OPA180 and OPA4180) are specified from –40°C to

+125°C, and the dual package (OPA2180) is

specified from –40°C to +105°C.