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AD5520:trouble with MEASOUT voltage range

Question asked by yuanyang on Oct 20, 2015
Latest reply on Nov 16, 2015 by thomas.abiog


HI this is my sch of ad5520. the pin 64(CLL) vee_3v3 is -3.3V and pin 63(CLH) vcc_3v3 is +3.3v.

I change the pin 26(FIN) voltage , the pin 58 (MEASOUT) should from -3.3V to + 3.3V . but the pin 58 (MEASOUT)  is -0.256V to 3.3V.

the R74 is 100K. and in force current mode

why the pin 58 (MEASOUT)  is -0.256V to 3.3V.