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TLC7135: How to use TLC7135 Input Full scale 200mv

PADAKATHU RANGASAMY
Prodigy 10 points
Part Number: TLC7135

Hello,

I am using TLC7135 to measure 0-2.0000v and 0-2.0000amps interface BCD with Micro controller, planning to use 0.1ohm shunt resister to measure current, the voltage across shunt will be 0-200mv for 0-2.0000amps. Now my question is How can i change TLC7135 input Full scale range to 200mv instead of 2.0000v, as per data sheet they mentioned Full scale range 200mv or 2.0000v. 

Please could any one explain which parts value need to change to use 200mv full scale (20000 counts for 200mv). 

  • 0
    TI__Guru**** 173636 points

    Hi Padakathu,

    welcome to our e2e forum!  Can you please tell me where you see that the input voltage range to the TLC7135 can be 200mV?  Everything I see implies that the Vin must be 2 X Vref for the full scale input to the device, and the reference is nominally set for 1V.