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Maximum sample rate question

fxdif
Associate II
Posted on March 23, 2004 at 11:26

Maximum sample rate question

2 REPLIES 2
fxdif
Associate II
Posted on March 22, 2004 at 10:00

I'm using an ST7FLITE09 and was wondering what is the maximum frequency I can sample.

From the datasheet I see

tCONV = tSAMPLE + tHOLD

where tHOLD is 8 cycles. But how many cycles is tSAMPLE and how is the number of cycles related to processor clock speed? Is it 1/Fosc.

I am clocking at 8Mhz so what is the maximum frequency I can sample (assuming 2 x Fsampling rate = Fsample)

TIA
anshul
Associate II
Posted on March 23, 2004 at 11:26

tSAMPLE is 4 1/fADC cycles and tHOLD is 8 cycles 1/fADC. For these details you can refer page 103 of Lite0 datasheet rev.2.5 which you can download from the net.