Other Parts Discussed in Thread: TLV274, , LMC6772, TLV1702, TLV3402, LMC6484, TLV2374
I am trying to design a thermostat and I originally used the op amp TLV274 as a comparator with some success, but I wasn't happy with the response time so I decided to try your comparator,TLC393, in it's place. I installed it as shown in the schematic, powered it on, and it almost immediately burned up.
Am I using the device incorrectly?
Can you explain what is meant by: "Input current, . . ±5 mA" as it appears in the data sheet? From what I understand, the input impedance should be much higher than this.
Perhaps the transitions at the input is too slow? It is based on changing temperature, which can be pretty slow.
The single supply is 12V and the input to the TLC393 max is about 1V to 11.5V.
Should I be concerned with gate to source capacitance of Q1?
Thank you,
Dave