The NCS21671 and NCV21671 are a series of voltage output

current sense amplifiers offered in gains of 25, 50, 100, and 200 V/V.

These parts can measure voltage across shunts at common mode

voltages from −0.1 V to 40 V, independent of supply voltage. The low

offset of the zero−drift architecture enables current sensing with

voltage drops across sense resistors as low as 10 mV full−scale. An

optional enable function is available to reduce current drain through

the input pins and power supply pins to negligible levels when

disabled or if Vs is less than 1.5 V. Two optional pins are included to

simplify input filtering. These devices can operate from a single

+1.8 V to +5.5 V power supply, drawing a maximum of 80 A of

supply current. These parts are available in Micro10 and SC70−6

packages.

Features

• Wide Common Mode Input Range: −0.1 V to 40 V

• Supply Voltage Range: 1.8 V to 5.5 V

• Low Offset Voltage: 25 V max

• Rail−to−Rail Output Capability

• Low Current Consumption: 80 A max

• Enable Pin to Turn Off Input and Power Supply Currents

• Optional Input Filtering Through CIN+ and CIN− Pins

• NCV Prefix for Automotive and Other Applications Requiring

Unique Site and Control Change Requirements; AEC−Q100

Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Typical Applications

• Power Bus Monitoring

• Battery Current Monitor

• Lighting Ballast