Other Parts Discussed in Thread: LM393B, LM339
Hi Teams
Customer selected LM293A in their new project for overcurrent protection but they found the respond time is slow than datasheet spec.
The schematic have shown below. We measure the output in PIN1 with 5V VCC and we already removed all cap cap and resistor connected to PIN1 (Just like output circuit). And the waveform I capture shown in diagram2, the respond time from output high to 0V is about 6us. (The green one is comparator output, the Blue one is reference voltage and the yellow one is current sensor output)
My questions:
- Datasheet listed the typical respond time is about 1.3us, I wondering to know are this spec work for both positive transient and negative transient(Output from Hight to Low)
- The typical respond time for negative transient is measure from high voltage to 0V or other specific points?
- Are LM393B could achieve better respond time than LM293A?