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DAC7811: DAC7811 Daisy Chain "freezing" issue

Prodigy 40 points

Replies: 2

Views: 65

Part Number: DAC7811

We are using DAC7811 in a new design in daisy chain mode. 32 bits in one sequence.

There are certain data pattern that lead to "freezing" the DAC7811. After sending these pattern the DAC will not accept any further data. The output will remain at the value set by the "freezing" pattern until the power supply is cycled.

Some pattern that repeatedly freeze the DAC are: 0x11D3, 0x1129, 0x172B,... there are many. The first two bytes (that go to the daisy chain) are set to 0. If the daisy chain bytes are set to other values, the DAC also freezes with DAC data that normally does not cause freezing.

The DAC behaves normal when just 16 bit data is sent.

Any ideas?

BR

Wulf

  • Just solved it: it was a feedthrough in the test setup to SYNC.

  • In reply to Wulf Mueller:

    Wulf,

    Thank you for the update, glad the problem was relatively easily resolved.

    Kevin Duke, MGTS
    ADC Product Marketing Engineer

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