ZHCSGU6A september 2017 – july 2023 ADS8588H
PRODUCTION DATA
The ADS8588H can operate with either an internal voltage reference or an external voltage reference using an internal gain amplifier. The internal or external reference selection is determined by an external REFSEL pin, as explained in the REFSEL (Input) section. The REFIN/REFOUT pin outputs the internal band-gap voltage (in internal reference mode) or functions as an input to the external reference voltage (in external reference mode). In both cases, the on-chip amplifier is always enabled. Use this internal amplifier to gain the reference voltage and drive the actual reference input of the internal ADC core for maximizing performance. The REFCAPA (pin 45) and REFCAPB (pin 44) pins must be shorted together externally and a ceramic capacitor of 10 µF (minimum) must be connected between this node and REFGND (pin 43) to ensure that the internal reference buffer is operating as closed loop.