Hi, I have a few questions on AD7760 operating in Filtered Output mode:
1. What operations can be performed while AD7760 is in Low Power mode? Obviously I can write to control register but can I read from Status Register or any other registers? Can I read last conversion value while AD7760 is in Low Power mode?
2. Datasheet states that in order to read status and other registers "user must first write to the control register of the device, setting a bit that corresponds to the register to be read. The next read operation outputs the contents of the selected register instead of a conversion result." Does it mean that I should use timing diagram from Fig.2? But than we read two times 16 bits. Is the MSW part carrying status register data or the LSW+STATUS? Or should I perform only single read? Do you have timing diagram for status register read operation?
3. Datasheet indicates minimum timing requirements for parallel interface. Is there any limit on minimum speed of the interface? I know the read must be completed before next /DRDY signal arrives but when AD7760 is in Low Power mode the conversion process is halted. Assuming we can read data from AD7760 in Low Power mode, are there any restrictions on maximum timings?
