Texas Instruments INA190
The INA190 is a low-power, voltage-output, currentshunt monitor (also called a current-sense amplifier). 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 commonmode voltages from –0.2 V to +40 V, independent of the supply voltage.| Part No. | INA190 |
|---|---|
| Datasheet | INA190 Download |
| Manufacturer |  Texas Instruments |
| Description | Precision Current-Sense Amplifier |
| Buy | Stock & Price |
FEATURES
●1 Low input bias currents: 500 pA (typ) (enables microamp current measurement)● Low power: – Low supply voltage, VS: 1.7 V to 5.5 V – Low shutdown current: 100 nA (max) – Low quiescent current: 50 μA at 25°C (typ)
● Accuracy: – Common-mode rejection ratio: 132 dB (min) – Gain error: ±0.2% (A1 device) – 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: 50 V/V – INA190A3: 100 V/V – INA190A4: 200 V/V – INA190A5: 500 V/V 2
APPLICATIONS
● Standard notebook PC● Smartphone
● Consumer battery charger
● Baseband unit (BBU)
● Merchant network and server PSU
● Battery test 3
DESCRIPTION
The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement.
