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Altera_Forum's avatar
Altera_Forum
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16 years ago

Terasic THDB_ADA question

Hi~~I have some questions about THDB_ADA

1) what's the ADC output data format?

i found the AD9248's datasheet. there were two data output format,

offset binary and two's complement. what kind of data format is the

THDB_ADA 's output format??

2) i used logic analyzers to analysis THDB_ADA output 14 bits status, why the

bit 9 of ADC always stuck at '1'.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    1. It's a hardware pin-strap option, as you can see in the datasheet. If I understand right, it's set to offset binary.

    2. Incorrect connected LA probe or a hardware fault.