Zero-Drift Operational Amplifiers - Texas Instruments
Description
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Reference Design
OPA2188
SBOS525C – AUGUST 2011 – REVISED JUNE 2016
OPA2188 0.
03-μV/°C Drift, Low-Noise, Rail-to-Rail Output, 36-V, Zero-Drift Operational Amplifiers
1 Features
•1 Low Offset Voltage: 25 μV (Maximum) • Zerø-Drift: 0.
03 μV/°C • Low Noise: 8.
8 nV/√Hz
0.
1-Hz to 10-Hz Noise: 0.
25 µVPP • Excellent DC Precision:
PSRR: 142 dB CMRR: 146 dB Open-Loop Gain: 136 dB • Gain Bandwidth: 2 MHz • Quiescent Current: 475 μA (Maximum) • Wide Supply Range: ±2 V to ±18 V • Rail-to-Rail Output: Input Includes Negative Rail • RFI Filtered Inputs • MicroSIZE Packages
2 Applications
• Bridge Amplifiers • Strain Gauges • Test Equipment • Transducer Applications • Temperature Measurement • Electronic Scales • Medical Instrumentation • Resistance Temperature Detectors • Precision Active Filters
3 Description
The OPA2188 operational amplifier uses TI proprietary auto-zeroing techniques to provide low offset voltage (25 μV, maximum), and near zero-drift over time and temperature.
This miniature, highprecision, low quiescent current amplifier offers high input impedance and rail-to-rail output swing within 15 mV of the rails.
The input common-mode range includes the negative rail.
Either single or dual supplies can be used in the range of 4 V to 36 V (±2 V to ±18 V).
The OPA2188 device is available in MSOP-8 and SO-8 packages.
The device is specified for operation from –40°C to +105°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPA2188
SOIC (8) VSSOP (8)
4.
90 mm × 3.
91 mm 3.
00 mm × 3.
00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Offset Voltage vs Temperature
145 OPA2188 Zero-Drift Architecture
125 Precision Laser Trim Architecture
Offset Voltage (mV)
105
85
65
45
25
5 -55 -35 -15
5 25 45 65 Temperature (°C)
85 105 125
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, change...
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