JAJSEC1C November 2019 – July 2020 ADS8686S
PRODUCTION DATA
The REFSEL pin is a digital input pin that enables selection between the internal or external reference mode of operation for the device. If the REFSEL pin is set to logic high, then the internal reference is enabled and selected. If this pin is set to logic low, then the internal band-gap reference circuit is disabled and powered down. In this mode, an external reference voltage must be provided to the REFIO pin. Under both conditions, the internal reference buffer is always enabled.
The REFSEL pin status is latched when the RESET pin transitions from low to high. After the reference is configured the changes to the logic level of REFSEL signal are ignored.