Other Parts Discussed in Thread: OPA2333-HT, , ADS1278, OPA2333
I have a very low frequency application (0-8Hz) but my understanding is that for delta-sigma converters any input signal is over sampled at a rate related to the clock input. Thus even for low frequency applications the actual sample speed can be quite high.
The issue i have is for DC performance and PCB space reasons i'd like to use a OPA2333-HT to drive the ADC, great DC specs but its bandwidth is only 350kHz.
But if my clock is 1Mhz and i set the clkdiv to "1" ie divide by 40 my assumption is the switched capacitors are on the inputs are switching at 1Mhz/40 = 25Khz thus the OPA2333-HT would be a suitable op amp to drive the ADS1278-HT? Could somebody at TI confirm?
also what are the pros and cons of the /40 and /8 clkdiv settings for low speed mode?
Note: i'm running in frame sync mode with two ADCs daisy-chained together (16 channels) in TDM mode, the frame sync period is 400Hz, its a high temp application (160 degrees Celsius) so i'm limited in op amp choice
kind regards
Martin