How to reduce effect of temperature to relaxation oscillator (using AD8542)?

Thank Harryh for your reply.

I used NP0 type capacitor and resistor with 25ppm/*C.

Can you suggest partnumber of suitable opamp to replace AD8542?

Thank Harry,

I will try and show the results later.

Hi Harry,

I've tried with AD8535 and AD8552 but the problem is not fixed.

The output is still effected by temperature. And I found new problem.

With the same circuit (just change opamp), there are the different frequency output

- With AD8542: Fout ~ 5050Hz, drift about 4-5Hz/*C

- With AD8552: Fout ~ 4800Hz, drift about 5-6Hz/*C

- With AD8538: Fout ~ 5170Hz, drift about 4-5Hz/*C