onsemi NCS(V)21671

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. 

Key features

• Enable pin to turn off input and power supply currents
• Optional input filtering through CIN+ and CIN− pins
• These devices are Pb−free, halogen Free/BFR free and are RoHS compliant
• Integrated filters

Additional features

• Wide common mode input range: -0.1 V to 40 V
• Supply voltage range: 1.7 V to 5.5 V
• Low offset voltage: ±25 µV max
• Enable pin

Applications

• Power bus monitoring
• Battery current monitor
• Lighting ballast