Category: Hardware
Product Number: AD7771
Hi,
For AD7771, datasheet recommends two different modes of power supply. One being single ended (3.3V and GND) and the other being dual supply rails (+1.65V and -1.65V). My application requires the dual voltage supply as the the input pins can withstand voltage upto -1.65V. In that case, which power supply should I intend for connecting the rails? Should I go for Negative charge pump based circuit ICs, as the current requirement is less than 100mA or should I follow the transformer based circuit, similar to what has been implemented in the AD7770/AD7771/AD7779 Evaluation board. I have +3.3V and +5V input supply rails available. Can you give me your recommendation on this matter?
Thanks
