AnsweredAssumed Answered

AD717x continous conversion mode

Question asked by razavimday on Jun 6, 2017
Latest reply on Jun 9, 2017 by razavimday

AD7172-BRUZ

We use continuous conversion mode. we get the data ,and then DOUT/RDY push high

our OS monitor this DOUT/RDY PIN into the low level to trigger the interrupt, but when we finish conversion, the DOUT/RDY PIN has a short delay (t7???) in low level and then push high. Is this right?

 

ERROR WAVEFORM:(error triggered into interrupt, convert again, 744ns, our ODR=2.5KHz)

CH1 DIN YELLOW 0X44

CH4 SCKL GREEN NOW 8MHz

CH2 DOUT/RDY BLUE

CH3 CS PURPLE

if we add 10us delay(this value must be over 5us) when we finish interrupt, the waveforms and data are ok!

 

main SCH share to you,

 

REG share to you,

attention for read format

address:0x28

data:0X0509

 

 

We found the issue may called DOUT_REST t7,but we think the t7 in datasheet may use max value(the worse case) .

Could you help us to check this issue? 10us delay we can not endure. the total resource of system is not enough for this delay. Thanks!

 

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