ISO122 / 124 and PGA102, isolated channel has a programmable gain circuit diagram


Posted on Mar 28, 2007

As shown in FIG grounds ISO122 / 124 and PGA102, ISO150 constituted with a gain programmable channel isolation circuit.


ISO122 / 124 and PGA102, isolated channel has a programmable gain circuit diagram
Click here to download the full size of the above Circuit.

After the input signal VIN is amplified by instrumentation amplifier PGA102 to ISO122P, after ISO102P isolation amplifier output VOUT. Two gain selection signals A0, A1 by the isolation after ISO150 added PGA102, PGA102 gain is set to (1, 10 or 100). Because the signal, power, ground and the output of the input signal, power, ground and gain control select pin completely isolated, so a good anti-interference performance of the circuit.




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