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Old 07-19-2011, 09:56 AM   #67
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Quote:
Originally Posted by dcramer View Post
I'd have to see the circuit.
I guess there is the potential for the chip itself to be dead, but assuming the circuit is fine I'm only concerned with the inputs and outputs. I picture the LM1815 circuit as a black box. I input VR+ and VR- and I get an output.

The application guide shows the output going to a relay. I'm guessing that's to trigger the relay to power the chip. If that's the case would a pull up resistor be required? The application doesn't specifically state this.
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