INA188:36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier

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 ?V (max)
    • Low Input Offset Drift: 0.2 ?V/°C (max)
    • High CMRR: 104 dB, G ≥ 10 (min)
  • Low Input Offset Voltage: 55 ?V (max)
  • Low Input Offset Drift: 0.2 ?V/°C (max)
  • High CMRR: 104 dB, G ≥ 10 (min)
  • Low Input Noise:
    • 12 nV/√Hz at 1 kHz
    • 0.25 ?VPP (0.1 Hz to 10 Hz)
  • 12 nV/√Hz at 1 kHz
  • 0.25 ?VPP (0.1 Hz to 10 Hz)
  • Wide Supply Range:
    • Single Supply: 4 V to 36 V
    • Dual Supply: ±2 V to ±18 V
  • 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
  • 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
keyINA188
Number of Channels (#)1
Vs (Min) (V)4
Vs (Max) (V)36
CMRR (Min) (dB)118
Input Offset (+/-) (Max) (uV)55
Input Offset Drift (+/-) (Max) (uV/C)0.2
Input Bias Current (+/-) (Max) (nA)2.5
Noise at 1kHz (Typ) (nV/rt(Hz))12.5
Iq (Typ) (mA)1.4
Bandwidth at Min Gain (Typ) (MHz)0.6
Gain (Min) (V/V)1
Gain (Max) (V/V)1000
Gain Error (+/-) (Max) (%)0.5
RatingCatalog
Operating Temperature Range (C)-40 to 125
Package GroupSOIC SON
Approx. Price (US$)1.85 | 1ku
Package Size: mm2:W x L (PKG)See datasheet (SON)
Noise at 0.1 Hz - 10 Hz (Typ) (uVpp)0.25
Datasheet?(1)
TitleTypeSize (KB)Date
INA188 Precision, Zero-Drift, Rail-to-Rail Out, High-Voltage Instrumentation AmplifierPDF157622 Sep 2015
Application notes?(1)
TitleTypeSize (KB)Date
Using op amps to reduce near-field EMI on PCBsPDF16626 Jan 2016
User guides?(3)
TitleTypeSize (KB)Date
Universal Instrumentation Amplifier EVM User’s Guide (Rev. B)PDF73909 Aug 2016
Single-Supply Thermocouple with RTD Base Cold-Junction Compensation Design GuidePDF2321408 Jul 2016
High Accuracy AC Current Measurement Using PCB Rogowski Coil Sensor Design Guide (Rev. A)PDF170405 Jul 2016
Models?(3)
TitleTypeSize (KB)Date
INA188 PSpice ModelZIP6?KB04 Sep 2015
INA188 TINA-TI Reference DesignTSC41?KB23 Sep 2015
INA188 TINA-TI Spice ModelTSM34?KB23 Sep 2015
Design kits & evaluation modules?(1)
NamePart#Type
Universal Instrumentation Amplifier Evaluation ModuleINAEVMEvaluation Modules & Boards
Software?(1)
Development tools?(2)
NamePart#Type
Calculate Input Common-Mode Range of Instrumentation AmplifiersINA-CMV-CALCCalculation Tools
SPICE-Based Analog Simulation ProgramTINA-TICircuit Design & Simulation
Ordering Information
Part #Preproduction / Production MaterialStatusTemp(oC)Price | QTYPackage | PinsDevice MarkingPackage QTY | Carrier
INA188IDProductionACTIVE-40 to 1252.22 | 1kuSOIC?(D)INA18875 | TUBE
INA188IDRProductionACTIVE-40 to 1251.85 | 1kuSOIC?(D)INA1882500 | LARGE T&R
INA188IDRJRProductionPREVIEW-40 to 125Contact BDTICSON?(DRJ)INA1881000
INA188 精密零漂移、轨到轨输出、高压仪表放大器 INA188
所选封装材料的热学和电学性质 DCP010505B
Using op amps to reduce near-field EMI on PCBs INA188
Universal Instrumentation Amplifier EVM User’s Guide INA118
Single-Supply Thermocouple with RTD Base Cold-Junction Compensation Design Guide INA188
High Accuracy AC Current Measurement Using PCB Rogowski Coil Sensor Design Guide TIDA-01063
INA188 PSpice Model INA188
INA188 TINA-TI Reference Design INA188
INA188 TINA-TI Spice Model INA188
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