ZHCSH46A December 2017 – June 2018 AMC1311
In a typical frequency inverter application, the high-side power supply (VDD1) for the AMC1311 is generated from the low-side supply (VDD2) of the device by an isolated dc/dc converter circuit. A low-cost solution is based on the push-pull driver SN6501 and a transformer that supports the desired isolation voltage ratings. TI recommends using a low-ESR decoupling capacitor of 0.1 µF and an additional capacitor of minimum 1 µF for both supplies of the AMC1311. Place these decoupling capacitors as close as possible to the AMC1311 power-supply pins to minimize supply current loops and electromagnetic emissions.
The AMC1311 does not require any specific power up sequencing. Consider the analog settling time tAS as specified in the Switching Characteristics table after ramp up of the VDD1 high-side supply.