2017-01-16 12:55 AM
What is the lowest value of series resistor that I can use to maintain stability of this amplifier.
I would like to use a series resistor of 200R to 1K to a load that will have some variable capacitance. I need to use a low power op-amp, if you chose to suggest another..#op-amp-stabilitySolved! Go to Solution.
2017-01-19 09:17 AM
Hello Andrew,
As you probably have seen, the TSV711 is tested with acceptable stability performance with pure capacitive load up to 200pF (this is illustrated in Figure 13, p13/29 of the datasheet).
For higher capacitive loads, a series resistor can be used, as you suggested.
The chart here below shows recommended values of series resistor to ensure stability for a given capacitor value.
Hope it can answer to your question.
Best regards,
Anthony
2017-01-19 09:17 AM
Hello Andrew,
As you probably have seen, the TSV711 is tested with acceptable stability performance with pure capacitive load up to 200pF (this is illustrated in Figure 13, p13/29 of the datasheet).
For higher capacitive loads, a series resistor can be used, as you suggested.
The chart here below shows recommended values of series resistor to ensure stability for a given capacitor value.
Hope it can answer to your question.
Best regards,
Anthony
2017-01-19 11:12 AM
Thanks Anthony,
The op-amp is usable in my circuit with either 4K or 1K + 100nF. Your answer is approximately what I expected.