Floating Signal Source Programmable Gain Amplifier Circuit Composed Of PGA203

Published:2011/7/29 9:10:00 Author:Robert | Keyword: Floating, Signal, Source, Programmable, Gain, Amplifier | From:SeekIC

The picture shows the floating signal source programmable gain amplifier circuit. This circuit uses digital-control instrumentation amplifier PGA203 integrated chip. Its programmable gain have: 1, 2, 4, 8 (binary). It has low bias current (maximum value is 50pA) and fast setup time (2us can be 0.01%) and low nonlinear distortion (maximum nonlinear distortion is 0.012%) and high CMRR (minimum value is 80dB). The relations between the control ports A0, A1's voltage level and the gain Av is listed in picture 2.



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