sinara-hw / FMC_Shuttler

16-channel 125MS/s 16bit DAC in FMC form factor.
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TEMP_ALARM does not turn off N3V0A PS #41

Closed tprzywoz closed 8 months ago

tprzywoz commented 1 year ago

IC4 has stable power input and pull-up PS during TEMP_ALARM. PG_DAC is not low because IC3 and IC1 have no input voltage (both IC44 and IC46 have run/en pins low)

Suggested solution: add diode between PG_DAC and TEMP_ALARM or PG_3V7_5V5 to keep power sequence and allow TEMP_ALARM to drive low state PG_DAC signal.