This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi Alex,
I searched the design archive and found channel separation information for the OPA2209, the dual version of the OPA209. There wasn't anything specific for the OPA4209, but the results should be nearly identical because the quad op amp is the dual with a symmetrical flip. The architecture and layout that the OPA4209 uses results in very high channel separation at 1 kHz and 10 kHz as seen in the graphs.
Regards, Thomas
Precision Amplifiers Applications Engineering
Hi Alex,
The driven section of the op amp is set up for a gain of +100 V/V (40 dB), with an input level of 50 mVRMS (141.4 mVp-p) applied to the non-inverting input. Thus, its output is swinging about 14.14 Vp-p. The other amplifier(s) for which the cross-talk is being measured are connected as a unity-gain buffer. A dual supply is used and its non-inverting input is connected to GND (0 V).
I hope this helps.
Regards, Thomas
Precision Amplifiers Applications Engineering