Voltage and current sense board with analog output

by Johnny

 

FEATURES

Description: This is a small voltage and current sense PCB. DC current is determined by measuring a voltage drop across a pair of parallel 1 mOhm shunt resistors, then converted to a final analog voltage output by the TI INA-169. Voltage sense is accomplished by scaling to 3.3V ADC range by a precision resistor divider.
The PCB is supplied without leads or connectors. The pad sizes are large enough to accommodate 12 gauge heavy duty leads but care must be exercised in soldering. Smaller gauge leads are considerably easier to solder without creating shorts.

Features:

50V Max
180A Max
Very low zero current offset
Analog output scaled for 3.3V ADC
Self Powered

 

SCHEMATIC

 

LAYOUT

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