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40V, bi-directional, ultra-precise current sense amplifier w/picoamp IB & ENABLE

Availability: 5,225


Package | PIN: UQFN (RSW) | 10
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.34
10-24 $2.10
25-99 $1.95
100-249 $1.70
250-499 $1.57
500-749 $1.32
750-999 $1.08
1,000+ $0.99


  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5V
    • Low shutdown current: 100 nA (max)
    • Lowquiescent current: 50 µA at 25°C(typ)
  • Accuracy:
    • Common-moderejection ratio: 132 dB (min)
    • Gain error: ±0.2% (A1device)
    • Gain drift: 7 ppm/°C (max)
    • Offset voltage,VOS: ±15 µV (max)
    • Offset drift: 80 nV/°C(max)
  • Wide common-mode voltage: –0.2 V to +40 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1: 25 V/V
    • INA190A2: 50V/V
    • INA190A3: 100 V/V
    • INA190A4: 200V/V
    • INA190A5: 500 V/V

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Texas Instruments  INA190A1IRSWR

The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-senseamplifier). This device is commonly used for overcurrent protection,precision current measurement for system optimization, or in closed-loop feedback circuits.The INA190 can sense drops across shunts at common-mode voltages from –0.2 Vto +40 V, independent of the supply voltage.

The low input bias current of the device permits the use of larger current-senseresistors, thus providing accurate current measurements in the microamp range. The low offsetvoltage of the zero-drift architecture extends the dynamic range of the current measurement. Thisfeature allows for smaller sense resistors with lower power loss, while still providing accuratecurrent measurements.

The INA190 operatesfrom a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options areavailable: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operatingtemperature range of –40°C to +125°C, and offered in UQFN, SC70, and SOT-23packages.