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ON Semiconductor NCS40x Title (MT)

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ON Semiconductor NCS40x

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ON Semiconductor NCS40x – high-side current sense amplifier family

NCS40x is a high voltage, high resolution, high-side current sense amplifier. It features gain options of 14V/V, 20 V/V, 50V/V, and 100V/V with a maximum ±0.35% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The NCS40x can perform unidirectional or bidirectional current measurements across a shunt resistor in a variety of industrial and telecom applications, including motor control, battery management, and base station power amplifier bias control.

Features & benefits

  • Low offset voltage: ±50µV typ. (referred to input)
  • Low offset drift: ±0.1µV/°C typ.
  • Bandwidth: 500Khz typ.
  • Operating Common Mode Input Range from 4 to 80V
  • Transient survival from -10 to 85V


  • General purpose high-side and low-side current sensing
  • Automotive
  • Telecom
  • Sensors
  • Bidirectional motor control
  • Battery chargers

Block diagram

ON Semiconductor NCS40x block diagram