TI INA188IDRJR

The INA188 is a precision instrumentation amplifier that uses auto-zero technology to achieve low offset voltage, near-zero offset and gain drift, excellent linearity, and ultra-low noise density (12nV/√Hz) down to DC. The INA188 is optimized to provide an excellent common-mode rejection ratio of over 104dB (G ≥ 10). Its excellent common-mode and power-supply rejection performance supports high-resolution precision measurement applications. This general-purpose three-op-amp design offers rail-to-rail output, low-voltage operation powered by a 4V single supply or dual supplies up to ±18V, and a wide input range with high impedance. These specifications make the device an ideal choice for general-purpose signal measurement and sensor conditioning applications, such as temperature or bridge applications. The gain can be set from 1 to 1000 using a single external resistor. The INA188 is designed with an industry-standard gain formula: G = 1 + (50kΩ/RG). The reference pin can be used for level shifting during single-supply operation or for offset calibration. The INA188 is rated for operation over a temperature range of -40°C to +125°C.

• Excellent DC performance:
  • Low input offset voltage: 55μV (maximum)
  • Low input offset drift: 0.2μV/°C (maximum)
  • High CMRR: 104dB, gain ≥10 (minimum)
• 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 by single external resistor:
  • Gain formula: G = 1 + (50kΩ/RG)
  • Gain error: 0.007%, G = 1
  • Gain drift: 5ppm/°C (maximum), 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 range: -55°C to +150°C
• SOIC-8 and DFN-8 packages

• Bridge amplifier
• ECG amplifier
• Pressure sensor
• Medical instrumentation
• Portable instrumentation
• Weighing scales
• Thermocouple amplifier
• RTD sensor amplifier
• Data acquisition