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INA333: capacitive load capability - dealing with capacitances around 1nF

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Part Number:INA333

INA333 has relatively CL capacitance - datasheet states CL=500pF.

I've found that using 1n - even with serial resistor of 1k doesn't always lead to stable output. Some parts show oscillations and some not - it's hard to tell.

I've tested several serial resistor values but when some parts were stable with this 1n/1k setup - other were oscillating even with 1n/4k7.

I'd rather not to use such high resistances in my application so the question arises - what distribution of stability I should expect.
The output is at 1,2V at it's max (that's the reference value for AD7706 converter in my application).

For the parts that tend to oscillate at 1n/1k setup, I've tested limiting the CL and I've found that I'd had to go even below 300pF.
That is a bit too much reduction for me (looking at the AD converter requirements).

So my question is - what solution I could use to be sure that my circuit will not oscillate at some combination of input signal/temperature ?

I understand that my 1nF is twice as CL max of 500pF however 1k separation value is quite large resistance I think.

In the INA333 datasheet there is an application with CL exceeding 1nF - together with 10k serial resistor but as I said I'd rather not use such large values (again - ADC specification).


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