ADC14155: Power Down State

Grace Milroy

Prodigy 10 points

Part Number: ADC14155

What is the state of the ADC14155 output pins when power down is asserted?

9 months ago

0 Rob Reeder 9 months ago

TI__Mastermind 26790 points

Hi Grace,

Sorry for the delay, we plan to look at this in the lab tomorrow.

Regards,

Rob

0 Drew Harrell 9 months ago in reply to Rob Reeder

TI__Intellectual 2280 points

Hi Grace,

Per the datasheet regarding Power Down (p. 20), "The output data pins are undefined and the data in the pipeline is corrupted while in the power-down mode." This may be assumed to mean that the output data pins are either high or low depending on the last value seen before the power down.

I confirmed this with a scope. In normal operation the output data lines were toggling. When the device gets put into power down mode, the pin was sometimes left low, and sometimes left high, depending on the last state before power down.

Best regards,

Drew

0 Grace Milroy 9 months ago in reply to Drew Harrell

Prodigy 10 points

Okay, thanks Drew. Are there any constraints on the relationship between 1.8V and 3.3V, during power up and power down?

0 Drew Harrell 9 months ago in reply to Grace Milroy

TI__Intellectual 2280 points

Grace,

No. The only constraints are the abs max values on page 5 of the datasheet.

Best regards,

Drew

Data converters

Data converters forum

ADC14155: Power Down State