Overview
The OPA188 operational amplifier, produced by Texas Instruments, is a precision, low-noise, rail-to-rail output device that utilizes TI's proprietary auto-zeroing techniques. This technology ensures a low offset voltage of 25 μV (maximum) and near zero-drift over time and temperature, making it an excellent choice for various precision applications. The OPA188 offers high input impedance, rail-to-rail output swing within 15 mV of the rails, and a wide supply range from ±2 V to ±18 V. It is available in MicroSIZE packages such as SOT-23-5, MSOP-8, and SO-8, and is specified for operation from –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Offset Voltage | 25 | μV (maximum) |
| Zero Drift | 0.03 | μV/°C |
| Noise (0.1 Hz to 10 Hz) | 0.25 | μVPP |
| PSRR | 142 | dB |
| CMRR | 146 | dB |
| Open-Loop Gain | 136 | dB |
| Gain Bandwidth | 2 | MHz |
| Quiescent Current | 510 | μA (maximum) |
| Supply Range | ±2 V to ±18 V | V |
| Output Swing from Rail | Within 15 mV | - |
| Operating Temperature Range | –40°C to +125°C | °C |
Key Features
- Low offset voltage: 25 μV (maximum)
- Zero drift: 0.03 μV/°C
- Low noise: 8.8 nV/√Hz
- Excellent dc precision: High PSRR and CMRR
- High input impedance
- Rail-to-rail output swing within 15 mV of the rails
- Input common-mode range includes the negative rail
- RFI filtered inputs
- MicroSIZE packages: SOT-23-5, MSOP-8, and SO-8
Applications
- Weight scales
- Analog input modules
- Flow transmitters
- Battery testing
- DC power supplies, AC sources, electronic loads
- Data acquisition (DAQ)
- Semiconductor testing
- Bridge amplifiers
- Strain gauges
- Transducer applications
- Temperature measurement
- Electronic scales
- Medical instrumentation
- Resistance temperature detectors
Q & A
- What is the maximum offset voltage of the OPA188?
The maximum offset voltage of the OPA188 is 25 μV.
- What is the zero drift of the OPA188?
The zero drift of the OPA188 is 0.03 μV/°C.
- What is the gain bandwidth of the OPA188?
The gain bandwidth of the OPA188 is 2 MHz.
- What is the quiescent current of the OPA188?
The maximum quiescent current of the OPA188 is 510 μA.
- What is the supply range of the OPA188?
The OPA188 can operate with a supply range from ±2 V to ±18 V.
- Does the OPA188 have rail-to-rail output?
- What are the available packages for the OPA188?
The OPA188 is available in MicroSIZE packages such as SOT-23-5, MSOP-8, and SO-8.
- What is the operating temperature range of the OPA188?
The OPA188 operates from –40°C to +125°C.
- What are some common applications of the OPA188?
The OPA188 is commonly used in weight scales, analog input modules, flow transmitters, battery testing, and more.
- Does the OPA188 have RFI filtered inputs?
