Enhanced product, 40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & EN

The INA190-EP is a low-power, voltage-output,

current-shunt 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-EP can sense drops across shunts at common-mode 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-EP 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 –55°C to +150°C, and offered in the SOT-23

package.