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Reference of AD5542A in bipolar mode

Dear AD engineers,

Could I ask if +5V/-5V is supported for AD5542A in bipolar mode? It is specified in datasheet everywhere that a 2.5V reference should be used, such as in page 8: Pin REF Connect this pin to an external 2.5 V reference.

Thanks a lot.

Regards,

Richie

5542A.pdf
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  • Hi Richie,

    For the lower rail, you could reach the negative rail, in your case, of -5V. for the upper rail, the output canonly reach 1LSB lower than the maximum output. In your case of 5V, it could theoretically reach 4.999923707V (or 5Volts - 1LSB).

    There is a BIPOLAR OUTPUT OPERATION section in page 16 of the data sheet for your reference on how the bipolar operation works. In choosing the opamp, there is an OUTPUT AMPLIFIER SELECTION section in page 17 for your guide on choosing a suitable amplifier.

    Regards,

    Mark

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  • Hi Richie,

    For the lower rail, you could reach the negative rail, in your case, of -5V. for the upper rail, the output canonly reach 1LSB lower than the maximum output. In your case of 5V, it could theoretically reach 4.999923707V (or 5Volts - 1LSB).

    There is a BIPOLAR OUTPUT OPERATION section in page 16 of the data sheet for your reference on how the bipolar operation works. In choosing the opamp, there is an OUTPUT AMPLIFIER SELECTION section in page 17 for your guide on choosing a suitable amplifier.

    Regards,

    Mark

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