1 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 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.
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. This feature allows for smaller sense
resistors with lower power loss, while still providing
accurate current measurements.
The INA190 operates from 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 are available: 25
V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The
device is specified over the operating temperature
range of –40°C to +125°C, and offered in UQFN,
SC70, and SOT-23 packages.