SLOS224J July 1999 – February 2024 THS4031 , THS4032
PRODUCTION DATA
The driving operational amplifier (OPA3 in Figure 7-4) in this application must have good slew rate, bandwidth, low noise, and distortion. The input of the operational amplifier can result in a maximum step of 4-V because of MUX switching. As a result, even if the signal bandwidth is low, the driving amplifier must settle from a 4-V step within one ADC sampling frame to avoid signal distortion. In this example, the settling requirement due to the ADC selection is 500 ns. The THS4031 is a good choice in this application due to the high slew rate and low distortion of this operational amplifier.