Other Parts Discussed in Thread: TINA-TI, TLV3011
Hi all,
I have a customer facing an issue with the TLV3011-EP at low temperatures at <-10°C. The REF output voltage of the comparator takes time to stabilize up to its nominal value after power-up and the duration even increases as the temperature decrease (~8s@-15°C, ~30s@-30°C).
It should not be a batch issue. The behavior is also visible when simulated in TINA-TI and only in this certain configuration.
It was observed that:
- The issue occurs if the +15V (monitored voltage, IN -) is powered-up before the +5VA (V+ of the comparator).
- The issue does not occur if we reduce the V+ from 5V to 3.3V. REF output stabilizes then directly with V+ without delay.
- The issue does not occurs with the TLV3011 connected as voltage comparator IC54 (i.e. when voltage is applied first on IN+ and not IN- as with faulty circuit).
The customer tries to understand the observed behavior, and particularly why it does not appear if the V+ voltage is reduced or why it does not appear in the case where the voltage is first applied on IN+ instead of IN-.
Can you see the cause for this issue? Might any capacitance be affected by the low temperature?
Many thanks for your help.
Best,
Miriam