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.