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AD5755-1 Analog Supply Current

Question asked by teap on May 17, 2017
Latest reply on May 17, 2017 by rrosario

Hello,

about the +15V, -15V power supply design for the AD5755-1 AVDD and AVSS supply pins, especially the required power supply current capability.

Could someone please check/confirm my understanding:

The AVDD supply current (AIDD) is not really affected by the D/A channel output load (for all output modes).

The AVSS supply current (AISS) is not really affected by the D/A channel output load for positive output voltages or current mode. However, for negative output voltages the load current adds to the AD5755-1 AISS supply current.

Is this basically correct? The AD5755-1 DC/DC circuitry is used as the VBOOST supply.

Thanks.

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