Analog Front End Design. Description this reference design is part of an analog front end for 50ω input oscilloscope application. By rob reeder and ramya ramachandran download pdf background.
The ia is the ad620 a low cost high accuracy instrumentation amplifier with excellent dc performance. Analog input configuration for rtd measurement using ad7124. For example with an analog front end design used in the analog devices circuit note cn 0381 as seen in figure 6 the cutoff frequency for differential signals is around 800 hz and the cutoff frequency for common mode signals is 16 khz.
An analog front end afe or analog front end controller afec is a set of analog signal conditioning circuitry that uses sensitive analog amplifiers often operational amplifiers filters and sometimes application specific integrated circuits for sensors radio receivers and other circuits to provide a configurable and flexible electronics functional block needed to interface a variety of sensors to an antenna analog to digital converter or in some cases to a microcontroller.
Cmr 100 db to nearly 1 khz 50 µv max offset voltage low input bias current 1 na max and low input voltage noise 0 28 µv from 0 1 hz to 10 hz. The three principal areas to consider are the front end which interfaces the analog input signal to the adc the voltage reference and the digital interface. Cmr 100 db to nearly 1 khz 50 µv max offset voltage low input bias current 1 na max and low input voltage noise 0 28 µv from 0 1 hz to 10 hz. Resistor and capacitor considerations.
