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 / RG). 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 .
|Number of channels (#)|
|Vs (Min) (V)|
|Vs (Max) (V)|
|CMRR (Min) (dB)|
|Input offset (+/-) (Max) (uV)|
|Input offset drift (+/-) (Max) (uV/C)|
|Input bias current (+/-) (Max) (nA)|
|Noise at 1 kHz (Typ) (nV/rt (Hz))|
|Iq (Typ) (mA)|
|Bandwidth at min gain (Typ) (MHz)|
|Gain (Min) (V/V)|
|Gain (Max) (V/V)|
|Gain error (+/-) (Max) (%)|
|Operating temperature range (C)|
|Package size: mm2:W x L (PKG)|
|Noise at 0.1 Hz-10 Hz (Typ) (uVpp)|
|Gain non-linearity (+/-) (Max) (%)|