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 .
ORDER NUMBER | PACKAGE | BODY SIZE |
---|---|---|
INA188 | SOIC (8) | 4.90 mm × 3.91 mm |
INA188 | WSON (8)(2) | 4.00 mm × 4.00 mm |
DATE | REVISION | NOTES |
---|---|---|
September 2015 | * | Initial release. |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
REF | 5 | I | Reference input. This pin must be driven by low impedance or connected to ground. |
RG | 1, 8 | — | Gain setting pin. For gains greater than 1, place a gain resistor between pin 1 and pin 8. |
V– | 4 | — | Negative supply |
V+ | 7 | — | Positive supply |
VIN– | 2 | I | Negative input |
VIN+ | 3 | I | Positive input |
VOUT | 6 | O | Output |