AnsweredAssumed Answered

low value current measurement

Question asked by HARIAnalog on Jul 10, 2018
Latest reply on Jul 18, 2018 by nenger

Hi

I need to measure the current consumed by our DSP in different operating modes.Please find the attached image

Please see the attached image.It shows DSP logic is powered from an LDO.Logic can accept voltages in the range .8V to 1.2V.My idea is to put shunt resistor in that path such that it won't disturb the .8V to 1.8V range.The voltage developed across shunt will be amplified and is given to an adc and adc will be connected to a uC.

 

The voltage across the shunt will be very small.Could you please suggest how to design the shunt

and also IC's which can amplify this small scale voltage.

 

Regards

Hari

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