6.3.4.2 Output Behavior in Case of a Missing High-Side Supply

If the high-side supply (AVDD) is missing, the device provides a constant bitstream of logic 0's at the output, and

DOUT is permanently low. Figure 6-6 shows a timing diagram of this process. A one is not generated every 128

clock pulses, which differentiates this condition from a valid negative fullscale input. This feature helps identify

high-side power-supply problems on the board. See the Diagnosing Delta-Sigma Modulator Bitstream Using

C2000™ Configurable Logic Block (CLB) application note for code examples of diagnosing the digital bitstream.

CLKIN

DOUT

AVDD

Data valid

Data valid

0

valid

missing

valid

Figure 6-6. Output of the AMC0136 in Case of a Missing High-Side Supply

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SBASAZ0A – AUGUST 2024 – REVISED DECEMBER 2024

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