I would like to use AD7770 (in future AD7771) for reading Data of 4-channels (ch0-Ch3 with ODR to 32kSps) only via slave SPI (MCU will be Master , SCLK from 25-30 MHz)
1. Can I read A/D-Data only for Ch0 till Ch3 without error of AD7770-functionality?
2. I will need for read data from one channel 32-SCL-pulses.. (one frame).
3. DRDZ- low going... I will read the first frame =/it means ... it will be automaticly ch0, next frame should be Chann1, next chann2... etc.
4. I will need for 4 channels 128 pulses of SCLK.. correct?
5. Is it enought for this funktionality after power-up (or reset) to have pins Format0 + Format1 on 3V3 ?
6. I necessary a delay after switch source for Data on SPI by setting GENERAL_USER_
CONFIG_3, Bit 4 (see page 45) ?