Texas Instruments INA188 Zero-Drift Instrumentation Amplifier
Texas Instruments INA188 Precision Zero-Drift Instrumentation Amplifier uses auto-zeroing techniques to achieve low offset voltage, near-zero offset, and gain drift. It also features excellent linearity and exceptionally low-noise density (12nV/√Hz) that extends down to dc. The INA188 is optimized to provide excellent common-mode rejection of greater than 104dB (G≥10). Superior common-mode and supply rejection supports high-resolution, precise measurement applications. The versatile three op-amp design offers a rail-to-rail output, low-voltage operation from a 4V single supply. It also offers dual supplies up to ±18V, and a wide, high-impedance input range. These specifications make this device ideal for universal signal measurement and sensor conditioning.Features
- Excellent DC Performance
- Low Input Offset Voltage: 55µV (max)
- Low Input Offset Drift: 0.2µV/°C (max)
- High CMRR: 104dB, G ≥ 10 (min)
- Low Input Noise
- 12nV/√Hz at 1kHz
- 0.25µVPP (0.1Hz to 10Hz)
- Wide Supply Range
- Single Supply: 4V to 36V
- Dual Supply: ±2V to ±18V
- Gain Set with a Single External Resistor
- Gain Equation: G = 1 + (50kΩ / RG)
- Gain Error: 0.007%, G = 1
- Gain Drift: 5ppm/°C (max) G = 1
- Input Voltage: (V-) + 0.1V to (V+) - 1.5V
- RFI-Filtered Inputs
- Rail-to-Rail Output
- Low Quiescent Current: 1.4mA
- Operating Temperature: -55°C to +150°C
- SOIC-8 and DFN-8 Packages
Applications
- Bridge amplifiers
- ECG Amplifiers
- Pressure sensors
- Medical instrumentation
- Portable instrumentation
- Weigh scales simplified schematic
- Thermocouple amplifiers
- RTD Sensor amplifiers
- Data acquisition
Simplified Schematic
Published: 2015-12-02
| Updated: 2022-03-11
