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INA188

ACTIVE

36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier

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Data sheet

INA188

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4 Input offset (±) (max) (µV) 55 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 12.5 Features Small Size, Zero Drift CMRR (min) (dB) 118 Input offset drift (±) (max) (µV/°C) 0.2 Input bias current (±) (max) (nA) 2.5 Iq (typ) (mA) 1.4 Bandwidth at min gain (typ) (MHz) 0.6 Gain error (±) (max) (%) 0.2 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Output swing headroom (to negative supply) (typ) (V) 0.22 Output swing headroom (to positive supply) (typ) (V) -0.22 Input common mode headroom (to negative supply) (typ) (V) 0.1 Input common mode headroom (to positive supply) (typ) (V) -1.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.25
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4 Input offset (±) (max) (µV) 55 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 12.5 Features Small Size, Zero Drift CMRR (min) (dB) 118 Input offset drift (±) (max) (µV/°C) 0.2 Input bias current (±) (max) (nA) 2.5 Iq (typ) (mA) 1.4 Bandwidth at min gain (typ) (MHz) 0.6 Gain error (±) (max) (%) 0.2 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Output swing headroom (to negative supply) (typ) (V) 0.22 Output swing headroom (to positive supply) (typ) (V) -0.22 Input common mode headroom (to negative supply) (typ) (V) 0.1 Input common mode headroom (to positive supply) (typ) (V) -1.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.25
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DRJ) 8 16 mm² 4 x 4
  • 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
  • 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

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 .

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 .
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Technical documentation

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* Data sheet INA188 Precision, Zero-Drift, Rail-to-Rail Out, High-Voltage Instrumentation Amplifier datasheet PDF | HTML 22 Sep 2015
Application brief Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. D) PDF | HTML 05 Dec 2024
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Application brief Simplify Voltage and Current Measurement in Battery Test Equipment (Rev. A) PDF | HTML 10 Mar 2022
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 27 Jul 2021
Technical article How to design an accurate DC power supply PDF | HTML 08 Apr 2021
White paper 設計準確且多功能的鋰離子 電池測試解決方案 10 Nov 2020
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Technical article Achieving highly accurate full-scale charge and discharge current control for high PDF | HTML 13 Aug 2018
Technical article How to charge and discharge battery test equipment PDF | HTML 12 Apr 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
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Design guide High Accuracy AC Current Measurement Using PCB Rogowski Coil Sensor Design Guide (Rev. A) 05 Jul 2016
Analog Design Journal Using op amps to reduce near-field EMI on PCBs 26 Jan 2016
Technical article Noise effects on the precision of amplifiers PDF | HTML 04 Nov 2015

Design & development

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User guide: PDF | HTML
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