DDC114: Default value in test mode

SY Yoon

Genius 3380 points

Part Number: DDC114

Hi,

When Test Mode is used, what is the default output value?

My customer is testing the DDC114 on custom board.

In test mode, the output value of all input ranges is 0xFFFFF.

Please let me know how to debug and what could be causing this phenomenon.

+1 ChienChun Yang over 1 year ago

Hi,

May I ask which customer is this? If not allow to disclose in public, I can reach out to you via email.

Is this thread a duplicated thread as this -

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How was the TEST signal controlled?

According to datasheet page 12,

If TEST is held high during the entire integration period, the integrators measure a zero value.

To apply packets of charge during Test Mode, simply strobe TEST low then high before the next CONV transition.

Each rising edge of TEST causes approximately 11pC of charge to be transferred to the integrators.

Thanks

0 SY Yoon over 1 year ago in reply to ChienChun Yang

Genius 3380 points

Hi,

A duplicate thread was posted by a colleague for the same customer. So I close this thread.

Thank you for your support.

Thanks

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