AMC1305L25: What is the max switching frequency can be used with AMC1305?

Hi, Aaron,

1. What about the CMOS family(AMC1305M), does that slow down the bandwidth?

2. our board is using F280049 micro, how to interface with AMC1305?

Thanks!

Hi, Aaron,

We are using micro F280049 which doesn't have delta sigma filter module, can you recommend how to interface with F280049?

Thanks! 

Hi, Aaron,

How is the bandwidth of the delta-sigma modulator defined? If 20M clock is used, how many clock cycle to get a sample?

Thanks!

Hi Shengnan,

Apologies for the delay. 

Unfortunately, I am not familiar with the F280049 and it is unlikely that we have any examples of our AMC's interfacing with an F280049 but I will look. Regarding the bandwidth, the OSR helps define this. In the table of the app note, you can see that with a lower OSR, the higher the bandwidth is but there is a tradeoff with accuracy. The number of clock cycles to get a sample is technically going to be your OSR. The OSR essentially determines how many samples are used to obtain a single sample. 

Regards,

Aaron