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26V, bi-directional, 350kHz current sense amplifier

Availability: 4,730


Package | PIN: SOT-23 (DBV) | 6
Temp: Q (-40 to 125)
Package qty | Carrier: 250 | SMALL T&R
Qty Price
1-99 $0.55
100-249 $0.47
250-999 $0.29
1,000+ $0.19


  • 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)

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Texas Instruments  INA181A1IDBVT

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.