INA188IDR

The INA188 is a precision instrumentation amplifier that uses TI proprietary auto-zeroing techniques to achieve low offset voltage, near-zero offset and gain drift, excellent linearity, and exceptionally low-noise density (12 nV/√Hz) that extends down to dc. The INA188 is optimized to provide excellent common-mode rejection of greater than 104 dB [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 4-V single supply as well as dual supplies up to ±18 V, and a wide, high-impedance input range. These specifications make this device ideal for universal signal measurement and sensor conditioning (such as temperature or bridge applications). A single external resistor sets any gain from 1 to 1000. The INA188 is designed to use an industry-standard gain equation: G = 1 + (50 kΩ / R_G). The reference pin can be used for level-shifting in single-supply operation or for an offset calibration. The INA188 is specified over the temperature range of -40°C to +125°C.

Applications

• Bridge Amplifiers
• ECG Amplifiers
• Pressure Sensors
• Medical Instrumentation
• Portable Instrumentation
• Weigh Scales
• Thermocouple Amplifiers
• RTD Sensor Amplifiers
• Data Acquisition

Key features

• Excellent DC Performance
• Low Input Offset Voltage: 55 μV (max)
• Low Input Offset Drift: 0.2 μV/°C (max)
• High CMRR: 104 dB, G ≥ 10 (min)
• Low Input Noise: 12 nV/√Hz at 1 kHz, 0.25 μV_PP (0.1 Hz to 10 Hz)
• Wide Supply Range: Single Supply: 4 V to 36 V; Dual Supply: ±2 V to ±18 V
• Gain Set with a Single External Resistor: Gain Equation: G = 1 + (50 kΩ / R_G); Gain Error: 0.007%, G = 1; Gain Drift: 5 ppm/°C (max), G = 1
• Input Voltage: (V-) + 0.1 V to (V+) - 1.5 V
• RFI-Filtered Inputs
• Rail-to-Rail Output
• Low Quiescent Current: 1.4 mA
• Operating Temperature: -55°C to +150°C
• SOIC-8 and DFN-8 Packages