Other Parts Discussed in Thread: REF5050A-Q1
Hi,
According to the datasheet, the ADC reference voltage should be between VSSAD and VCCAD. I want to use a high accuracy 5V reference (REF5050A-Q1) on one hand, and want to use the TPS65381A companion chip to supply the VCCAD by 5V. The TPS65381A has obviously higher tolerance than the reference and potentially can be as low as 4.9V whilst the reference is still 5V.
The VCCAD would be 100mV lower than the reference voltage in this case.
What are the implications of such a setup? Can the TMS570 ADC work with 0.1V higher Vref than VCCAD correctly? (A charge redistribution type SAR ADC potentially can...)
Thanks,
Tamas
