AMC1203: AMC1210 can connect with four AMC1203?

Hi Went,

Yes, you can connect 4 AMC1203 devices to an AMC1210 filter chip. Using OSR of 256 would get you ~40kSPS data rate and with a 25MHz SPI interface, you can read all data from the filter modules in a little under 3mS.

Hi Tom

Thanks. And,when get 40kSPS,the resolutions can be up to 16bits?

Hi Went,

Yes - 16-bit resolution, about 14 bit ENOB, see Figure 28 in the AMC1203 datasheet.

Wow...very good
And the AMC1204 is the same to AMC1203? AMC1201 can connect with 4 AMC1204 devices?and 4 AMC1204 can work together,the AMC1210 still work normal? How fast can be up?

Hi Went,

Yes - AMC1204 as well. The biggest difference between the two parts is that AMC1204 has CLKIN (uses and external modulator clock) while AMC1203 has CLKOUT (uses an internal modulator clock). To truly synchronize everything in a multi-phase system, the AMC1204 would be the better choice., source the MCLK from a single 20MHz oscillator that feeds the AMC1210.

Hi Tom
But the one page of the AMC1204 datasheet said:When used with an appropriate external digital filter, an effective number of bits (ENOB) of 14 is achieved at a data rate of 78 kSPS.
So 4 AMC1204 devices connect with AMC1201,AMC1204 can only be up to 78kSPS?

Hi Went,

Data rate and ENOB are based on OSR, which is related to the MCLK frequency. All the specifications in the AMC1204 datasheet are based on an OSR of 256 with MCLK of 20MHz (20MHz/256OSR = 78kSPS data rate). A lower OSR will give you a higher data rate, but with lower ENOB.

Hi Tom
4 AMC1204 devices connect with AMC1210,the speed of each AMC1204 is up to 78kSPS, how long can I read all data from the filter modules in paralle or spi? It means that make sure I can read all data,just delay? Where do the AMC1210 datasheet say?

Hi Went,

The serial and parallel timing of the AMC1210 is described on pages 6 and 7 of the datasheet. As I said before, you can run the SPI clock at 25MHz and assuming you were using 16-bit data mode, you would need 2.88mS to read the status and filter data.