text.skipToContent text.skipToNavigation


Dual Channel, 26V, Bi-Directional, Low-/High-Side Voltage Output Current Sense Amp


Package | PIN: DGS | 10
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $0.76
10-24 $0.68
25-99 $0.63
100-249 $0.54
250-499 $0.50
500-749 $0.41
750-999 $0.32
1000+ $0.29


  • Common-Mode Range (VCM): –0.2 V to +26 V
  • High Bandwidth: 350 kHz (A1 Devices)
  • Offset Voltage:
    • ±150 µV (Max) at VCM = 0 V
    • ±500 µV (Max) at VCM = 12 V
  • Output Slew Rate: 2 V/µs
  • Bidirectional Current-Sensing Capability
  • Accuracy:
    • ±1% Gain Error (Max)
    • 1-µV/°C Offset Drift (Max)
  • Gain Options:
    • 20 V/V (A1 Devices)
    • 50 V/V (A2 Devices)
    • 100 V/V (A3 Devices)
    • 200 V/V (A4 Devices)
  • Quiescent Current: 260 µA Max (INA181)

All trademarks are the property of their respective owners.

Texas Instruments  INA2181A3IDGSR

The INA181, INA2181,and INA4181 (INAx181) currentsense amplifiers are designed for cost-optimized applications. These devices are part of a familyof bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltagedrops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent ofthe supply voltage. The INAx181 family integrates a matchedresistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. Thismatched gain resistor network minimizes gain error and reduces the temperature drift.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channelINA181 draws a maximum supply current of 260 µA; whereas, thedual-channel INA2181 draws a maximum supply current of 500 µA, andthe quad-channel INA4181 draws a maximum supply current of 900µA.

The INA181 is available in a 6-pin, SOT-23 package. TheINA2181 is available in an 10-pin, VSSOP package. The INA4181 is available in a 20-pin, TSSOP package. All device options arespecified over the extended operating temperature range of –40°C to +125°C.