NCS199 and NCS21x Current Sense Amplifiers

By ON Semiconductor 66

NCS199 and NCS21x Current Sense Amplifiers

ON Semiconductor's NCS199 and NCS21x devices are voltage output current shunt monitors that measure voltage across shunts at common-mode voltages from -0.3 V to 26 V, independent of supply voltage. Multiple fixed gains are available: 50 V/V, 75 V/V, 100 V/V, 200 V/V, 500 V/V, or 1,000 V/V. The low offset of the zero-draft architecture enables current sensing with maximum drops across the shunt as low as 10 mV full-scale. The devices cab operate from a single 2.7 V to 26 V power supply, drawing a maximum of 100 µA of supply current. All versions are specified over the extended operating temperature range (-40°C to 125°C).

Features
  • Wide common mode input range -0.3 V to 26 V
  • Supply voltage range from 2.7 V to 26 V
  • Low offset voltages of ±60 µV, ±100 µV, and ±150 µV Max
  • Low offset drift
  • ±1% accuracy for NCS21x
  • ±1.5% accuracy for NCS199
Benefits
  • High-side current sensing for high voltage systems
  • Flexible system supply voltage
  • Low value current sense resistors for better power efficiency
  • Temperature sensitive applications
Applications
  • Power monitors
  • Power adapters
  • Feedback control loops
  • Current sensors
  • Power monitors
  • Power adapters
  • Feedback control loops
  • Current sensors
Market Segments
  • Automotive
  • Computing
  • Networking and telecom
  • Consumer and portable

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