Thank you for your reply.
I’ve attached my simply project, with AD637 library
The value of GMIN was imposed as suggested in a comment on ad637.cir
Use .OPTIONS GMIN=5E-17 for best output accuracy
I’m not an pspsice expert
I will get the RMS value of the signal as below with AD637.
But I doubt that the long time duration of the small voltage level would be increase the error of the RMS value.
So, I want to know it's a correct choice for AD637 in my design.
In the AD637 data sheet Rev.L p18 fig.20 the circuit to set the reference dB = 0 point uses the AD637 integrated buffer and two external op-amps, one of which is obsolete. In any case this seems to be over-complex just to level shift a dc voltage.
Anyone have an idea of the max output current on the AD637. The datasheet shows a min output current but nothing for the max. Thanks
Hello friends.I need an IC RMS TO DC CONVERTER with some features that I can not see clearly in the datasheets (AD637, AD536, AD637 for example).. Input signal:- Not more than 1 vrms- Various waveforms- Up to 1MHZ is more than enough- Best possible accuracy…
I just enclosed my schematics.
Pls refer to my attahced.
"+" pole of 100uF capacitor is put on RMSOUT-pin. So no prolem.
We put 2 AD637s that are different value CAV capacitors 100uF and 0.1uF.
Is this no problem?
Thanks for detailed reply! I have some more questions:
1. Could you please clarify, what does the "additional error" , shown in figure 15 of the AD637 datasheet, mean? Is that total error which is combination of dc offset and double-frequency ripple…