art Number: ADS1262EVM-PDK
Dear Technical Support Team,
If AD conversion settings are following conditions, an error "PGA positive rail fault" appeared.
AVDD = 5V
On Board CLK
PGA bypass
Level Shift ON (2.5V)
FIR Filter, 20SPS,
Chop mode OFF
Calibration OFF
AINP / AINN = AIN0
Reference = AVDD (5V)
Setting "PGA to x1" instead of "PGA bypass" doesn't occur the error.
According to the datasheet 37 page, I think that the detection method is same both 1x and bypass.
So I don't understand why the error occurs when PGA bypass
■Files
I attached data capture and register map and output log when an error occurs.
Name Addr R/W Init Value ID 0x00 R - 0x03 POWER 0x01 R/W 0x11 0x02 INTERFACE 0x02 R/W 0x05 0x05 MODE0 0x03 R/W 0x00* 0x00 MODE1 0x04 R/W 0x80* 0x80 MODE2 0x05 R/W 0x04* 0x84 INPMUX 0x06 R/W 0x01 0x00 OFCAL0 0x07 R/W 0x00 0x00 OFCAL1 0x08 R/W 0x00 0x00 OFCAL2 0x09 R/W 0x00 0x00 FSCAL0 0x0A R/W 0x00 0x00 FSCAL1 0x0B R/W 0x00 0x00 FSCAL2 0x0C R/W 0x40 0x40 IDACMUX 0x0D R/W 0xBB 0xBB IDACMAG 0x0E R/W 0x00 0x00 REFMUX 0x0F R/W 0x00 0x24 TDACP 0x10 R/W 0x00 0x00 TDACN 0x11 R/W 0x00 0x00 GPIOCON 0x12 R/W 0x00 0x00 GPIODIR 0x13 R/W 0x00 0x00 GPIODAT 0x14 ** 0x00 0x00
[Device Information] EVM Device Name ADS1262 Date and Time 08520 15:04 (���� (�W����)) Notes AVDD=5V, On Board CLK, PGA bypass , Level Shift ON(2.5V), FIR Filter, 20SPS, Chop mode OFF, Calibration OFF, AINP/AINN = AIN0, Reference = AVDD(5V) Number of Channels 1 [Channel Information] Channel Name ADC1 Sampling Frequency 20.000 Input Frequency 7372800.000 Max Code 2147483647.000 Max Voltage 5.000 Min Code -2147483648.000 Min Voltage -5.000 Data Format Decimal [Channel Data] 261030 260955 260652 260676 260775 261073 260848 260923 260888 260539 260993 260880 260520 260157 260748 260899 260887 260999 260595 260722 260865 260922 260544 260950 260860 260745 260542 260657 260613 260750 260774 260536 260434 260732 260750 260585 260659 260852 260660 260840 260691 260929 260621 260690 260692 260592 260944 260666 261226 261112 260958 260956 260819 260472 260826 260596 260880 260872 260809 260929 260440 260770 260602 260551 260874 260725 260498 260884 261048 260622 260373 260582 260797 260973 260863 260588 260998 261050 260694 260796 260707 260641 260369 260723 260954 260623 261065 260964 260531 260863 260979 260880 260753 260765 260590 260629 261151 260565 260749 261004 260771 260899 260313 260885 260619 260754 260570 260442 260731 260977 260590 260822 260642 260755 260711 261189 260763 261007 260446 260520 260540 260802 260271 261195 260302 260597 260862 260917 260686 260755 261164 260689 260848 260864 260515 260873 260738 260556 261058 260993 260680 260713 260406 260648 260441 260356 260742 260454 260584 260651 260931 260502 260590 260535 260789 261015 260763 260874 260484 260683 260260 260724 260545 260626 261334 260559 260809 260957 260786 260888 260735 260241 260846 260538 260615 260577 260677 261134 261158 260900 260730 260476 260959 260348 261266 260868 260608 260796 260809 260868 260425 260815 260652 260674 260961 260534 260411 260520 260822 260402 260371 260778 260498 260428 260381 260557 261060 260921 260787 260573 260699 260667 260945 260555 260752 260464 261166 260946 260559 260639 260453 260756 260549 260658 260687 260475 260656 260769 260951 260942 260916 260791 260657 260808 260741 260632 260475 260745 260582 261013 261104 261236 260772 261144 260849 260881 260998 260447 260686 261102 260524 260933 261011 260668 260602 260482 260756 260720 261127 261100 261139 260727 261101 260976 260664 260988 260907 260744 261178 260801 260947 261012 260694 260566 260794 260705 260928 260824 260957 260697 260834 261020 260964 260990 260579 260475 261036 260923 261183 260718 260751 260821 260729 260835 260305 261092 260614 260983 260672 260963 260882 260632 260073 260391 260802 260655 261009 260859 260513 260756 260661 260969 260987 261203 260850 261263 260807 260902 260905 261034 260818 260624 260557 260439 260521 260877 260775 260696 260584 260732 260566 260706 261112 260682 260865 261117 260657 261123 260503 260717 260779 260905 261227 260557 260632 260961 260483 260516 260678 260854 260658 260854 260678 260933 261080 261236 260605 260662 260848 260946 261161 260467 260950 261070 260731 260694 261166 260592 260563 260713 260738 260772 260608 260386 260965 260838 260953 260583 260782 260859 260736 260585 260496 260500 260279 260569 260600 261035 260772 260797 260528 260662 260694 260994 260530 260905 260522 260714 261176 260755 260684 260627 260559 261081 260934 261296 261176 260314 260666 260819 260830 261127 260417 260618 260853 260605 260311 260457 260689 260752 260691 260505 260996 260659 260717 260817 260849 260452 260479 260756 260632 260734 261104 260170 260697 260301 260729 260722 260598 260999 260543 261166 260912 260945 260571 260991 260915 261042 260458 260561 260525 261193 260608 260387 260842 260390 260799 260694 261243 260648 260922 260431 260838 260963 260836 260837 260346 260822 260631 261183 260435 260569 260663 260892 261073 260866 260989 260715 261099 260421 260423 260754 260369 260377 260929 260720 260539 260873 260663 260700 260382 260744 261207 260462 260661 260579 261210 261157 260542 260823 260960 260416 260515 261191 260549 260940 260282 260447 260635 260966 260731 260656 261005 260459 260695 260570 260374 260610 260488 260854 260726 260636 260347 260551 260475 260638 260945 260674 260725 260435 261097 260970 261012 260912 261147 260697 260809 260856 260902 260837 260725 260700 261014 260911 260860 260717 260795 260529 260819 260941 260949 260437 260644 260613 260450 260451 260652 260868 260968 260584 260581 260876 260251 260824 260550 260614 260638 261170 260715 260336 260756 261051 260770 260692 260604 260732 260403 260233 260668 260281 260403 260973 260863 260428 260667 260979 260627 260954 260650 260993 260602 260417 260677 260521 260494 260694 260714 260845 261147 260554 260746 260631 260888 260882 260921 260228 260695 260978 260739 260560 260548 260839 260666 260496 260724 260612 260890 260766 260843 260610 260539 260596 260617 260718 260325 260626 260815 260762 260872 260668 260673 260933 260781 260522 261030 260237 260290 260323 260691 261112 260447 260767 260449 260733 260575 260849 260401 260576 260553 260315 260621 260779 260826 260614 260985 260835 260744 261066 261047 260814 261055 260540 260403 260888 260841 260833 260772 260977 260174 260538 260526 260471
Best Regards,
ttd
