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ADL5315 for high-side current measurement

Question asked by asavanth on Sep 23, 2015
Latest reply on Nov 5, 2015 by jdobler

Hi, I have a setup to drive VSET of ADL5315 using a dac. I was hoping I would be able to measure the current of a load on INPT using a resistor on IOUT terminal. The bandwidth is not high (<1kHz). Firstly, can the ADL5315 be used for this application (aside of APDs)? I see that no matter what, I cannot get any output voltage on INPT. I can change VSET to any voltage between 0 to 2.2V, but there is no response on INPT and IOUT. I can see supply-1.1v on SREF as suggested in the datasheet. Any suggestions would help. Thanks.