INA188 36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier | TI.com

INA188 (ACTIVE) 36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier

 

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Description

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 .

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 µVPP (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 / RG)
    • 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

Parametrics

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Part number Order 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 Group Package size: mm2:W x L (PKG) Noise at 0.1 Hz-10 Hz (Typ) (uVpp) Gain non-linearity (+/-) (Max) (%)
INA188 Order now 1     4     36     118     55     0.2     2.5     12.5     1.4     0.6     1     1000     0.5     -40 to 125     SOIC | 8
SON | 8    
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8SON: 16 mm2: 4 x 4 (SON | 8)    
0.25      
INA828 Order now 1     4.5     36     140     50     0.5     0.6     7     0.6     2     1     1000     0.15     -40 to 125     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     0.14     0.001