I am working on the firmare for a system that uses the LTC2991 for temperature measurement. I am adding support for detecting remote diode faults (open, short, reverse fitting).
The sense diodes are connected to V1 and V7, so I should be able to read the diode voltages from V2 an V8. However I am struggling to interpret the reading. The data sheet (revision F, 10/15) says:
Voltages are only available for the remote diodes,
not the internal sensor. This code repeats at a diode volt-
age of approximately 0.3125V (see Tables 13 and 14).
The absolute temperature of the diode can be used to
detect whether the diode is operating (≤0.3125V or
The referenced table (table 16) gives:
Val : Voltage
Would I be correct to interpret a diode voltage of 0 as a faulty sensor diode?