Can a servo loop implementation help to determine the input offset voltage of an open collector comparator?
Please help to understand and use a correct circuit to measure the Vos of an open collector comparator.
Thank you,
Bala Suren R
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Can a servo loop implementation help to determine the input offset voltage of an open collector comparator?
Please help to understand and use a correct circuit to measure the Vos of an open collector comparator.
Thank you,
Bala Suren R
Hello Bala,
See the TLC3702 datasheet Parameter Measurement section, pages 10 and 11.
The circuit uses a triangle wave input with an integrator loop. This is close to how they are actually measured in production.
You will need a pull-up resistor for the open collector output. But it is important to not run the clock too fast sine the rising and falling edges of the open collector output are not symmetrical and can lead to error.
Thank you Thomas, I have raised the query in mentioned forum.
Sure, will contact you if I didn't get the solution.