AD5542A gives +-Vref as output range in bipolar mode. the external output amp used for obtaining bipolar output is ADA4622-4, which is having input offset voltage +-0.8 mV at 25 degree and open loop gain of 118 dB. the equation used for calculating bipolar output voltage is below which is given in data sheet of AD5542A.

Hi SN@,

To compute for the bipolar output voltage, you have to convert the open loop gain to absolute value first before using it on the equation above.

A=20logGOL

where GOL is the absolute open loop gain

A=open loop gain in dB

For the offset voltage, use either the + offset voltage or - offset voltage on the equation.

Also note that there is a typographical error on the denominator of the equation. it should be 1 + [(2+RD)/A].

Best regards,

Rainier