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100A AC/DC Hall-Effect Bi-directional Current Sensor
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The CS-100A is a Hall effect current sensor board capable of measuring Bi-directional DC current flow. This sensor can be used in AC and DC systems requiring isolation from the measured circuit and has low insertion loss and more connection options compared to conventional resistive current shunts.
The Hall-effect chip senses the magnetic field generated by the current flowing through the sensors legs, which in turn outputs an analog voltage proportional to the current it senses. The sensitivity of the device is factory laser trimmed for precision and accuracy with a wide temperature range.
The Analog output of the sensor may be connected directly to an Analog Digital Converter or ADC port of most micro controllers and read easily by a few lines of code, it can also be configured so that an Op-Amp/Comparator monitors the voltage output for current limiting or overload indication.
NOTE: Measuring AC currents would require RMS-DC conversion for it to be read correctly by a micro-controller's ADC and will be uni-directional only.
Measures Bi-directional DC and uni-directional AC currents
Low noise, Low loss Monolithic Hall IC
Fast and accurate analog output
High isolation from measured circuit
May be used as High-side or Low-Side sensing
3V to 5V single supply operation
Measured circuit up to 300V AC/DC
High capacity stitched copper pads
Analog output proportional to measured current
Flexible connection and mounting options
Easy to deploy with most uController systems
Battery Chargers and Power supplies
High current RC and Robotic battery systems
Motor Control and Load detection
Solar / Wind powered systems
Automotive audio equipment
Telecom Power supplies
2-way radio equipment
Power management systems
RV and other recreational vehicle battery systems
CS-100A Spec Sheet(pdf)
Vout at zero current:
Normal operating Temperature:
-20 to 85 degC
Current range @ 5v Vcc:
Current range @ 3.3v Vcc:
up to 300V
The sensitivity of these devices vary proportionally with supply voltage(Vcc). If Vcc is other than stated above, Sensitivity can be determined by feeding a known current load to the device and calculate it's corresponding sensitivity(see data sheet). Calibrating these devices on the host microcontroller against a known current load will increase accuracy in most applications.
200A AC/DC Hall-Effect Bi-directional Current Sensor
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