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What is a Current Sensor and How is it Used?

Current Shunt Monitors with Best-in-Class Features

Industry's First Triple-Channel Shunt and Bus Voltage Monitor
     

TI's industry-leading portfolio of current shunt monitors, or current sense amplifiers, reduce board space and system cost while delivering high accuracy for a wide range of end equipment, including smartphones, tablets, battery chargers, test equipment, and industrial and telecommunications applications.

INA3221 - Industry's first triple-channel shunt and bus voltage monitor

Key features and benefits

  • Triple-channel device with digital interface allows for monitoring three separate voltages, eliminating the need for discrete devices for each voltage
  • High accuracy: 80 µV maximum offset voltage and 0.5% gain error enable high peak current detection
  • Integrate into applications with increasing common-mode voltage ranges: Common-mode range of 0 to 26V, supply range of 2.7 to 5.5V, and 160 mV maximum shunt
  • Performance optimization under multiple operating conditions: Configurable alert monitoring scheme, programmable sample averaging, and independent bus and shunt voltage conversion times
 

INA282 - Wide common-mode range, bidirectional, high accuracy current shunt monitor

Key features and benefits

  • 70 µV maximum offset voltage and low gain error enables system power savings with smaller shunt resistors, while maintaining high accuracy
  • High accuracy: Wide common-mode range of -14 to 80V and high common-mode rejection ratio of 120 dB maintains high accuracy in high voltage applications

INA223 - Industry's first analog multiple output device offering multiplexed current, voltage and instantaneous power values

Key features and benefits

  • The only analog multiple output device to offer multiplexed current, voltage, and instantaneous power values in a single device
  • High accuracy: Programmable gain of 20, 128, and 300 allows operation over wide dynamic current load without switching the sensing element, improving response time and accuracy
  • Shutdown feature disables the device and disconnects it from the shunt resistor and supply voltage, reducing battery consumption
  • Wide dynamic range enables the device to detect a voltage drop across a shunt at common-mode voltage ranges of 0 to 26V, allowing integration into applications with varying voltage requirements
 

LMP8480 - Precision high-side current sense amplifier with voltage output

  • High common-mode voltage range of 4 to 76V and high supply of 4.5 to 76V allows device to be powered from the same voltage node it is monitoring, removing the need for additional regulator and reducing system cost
  • 50% lower input offset voltage (265 μV) than competition, increases sensing accuracy

Current Shunt Monitor Portfolio

Device

VCM (V)

VSUPPLY (V)

Offset (µV)

Gain

BW (MHz)

Feature

INA3221 0 to 26 2.7 to 5.5 80 1 0.007 Bidirectional
INA223 0 to 26 2.7 to 5.5 100 program 0.025 Bidirectional
INA282 -14 to 80 2.7 to 18 20 50x 0.01 Bidirectional
LMP8480 4.5 to 76 4.5 to 76 275 20 to 100x 0.27 Unidirectional
INA193 -16 to 80 2.7 to 18 500 50x 0.5 Unidirectional
LMP8640 -2 to 76 2.7 to 12 900 20 to 100x 0.45 Unidirectional
LMP8645 -2 to 76 2.7 to 12 1000 program 0.26 Unidirectional
INA270 / 1 -16 to 80 2.7 to 18 500 20 to 40x 0.13 Unidirectional
LMP8601 / 2 / 3 -22 to 60 3 to 5.5 1000 20 to 100x 0.06 Bidirectional
INA210 / 1 / 2 / 3 / 4 -0.3 to 26 2.7 to 26 0.15 50 to 1000x 0.014 Bidirectional
INA199 -0.3 to 26 2.7 to 26 5 50 to 200x 0.014 Bidirectional
INA216 1.8 to 5.5 1.8 to 5.5 30 25 to 200x 0.01 Unidirectional