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ADS8674: how should the chip reset itself if customer dont send reset command or trigger the RST/PD pin?

Part Number: ADS8674

dear specialist;

my customer use ads8674 to design medical product, now they appear below phenomena, as below.

1.the chip can run normally  firstly;

2. after running a period (about several days,may be three to five days,or more);the chip will be abnormal,customer cant read the right data in register;

3.customer find the reason is that the chip reset and result the configured data restore to default value, so customer cant read the correct converted data in register;

4.but in fact,customer don't send and RST command or active low  RST/PD pin,;

so customer want to know what event can trigger RST mode except below two methods;

thanks.

best regards

Cickey Xu

  • Hello Cickey,

    Welcome to E2E forum.

    Can you please let me know which parameters/data have been changed and saved by the customer? It sounds like a undesired interference signal appeared on RST/PD, is this pin connected to high supply directly or controlled by a microcontroller? is there any pull-down resistor on this pin? Can you please ask the customer to monitor this RST/PD with an oscilloscope with a trigger?

    Thanks.

    Best regards

    Dale

  • Hello Cickey,

    Is it safe to assume that you have resolved this issue? Please feel free to post back should you need additional help.