AD585 12bit A/D conversion system circuit

As shown in the figure, it is the 12-bit A/D conversion system circuit of AD585. AD585 has a fast sampling time, so it can be used in multi-channel data acquisition systems to complete high-frequency signals and high-throughput high-speed A/D conversion. AD585 completes the sampling and holding of the signal, and AD574A completes the analog-to-digital conversion of the signal. The 0-10V analog signal is input from pin 2 of AD585, and after sampling and holding, it is output from pin 8 to pin 13 of AD574A. After AD574A converts the analog signal into a 12-bit digital signal output. The sampling and holding state is completed by the output of the control signal from the STATUS terminal (pin 28) of AD574A to the HOLD terminal (pin 12) of AD585. When HOLD=0, the circuit is in the sampling state; when HOLD=1, the circuit is in the holding state. The signal passing rate is 26.3kHz, and the maximum signal input frequency is 13.1kHz.