应用功能:LC2MOS High Speed, P Compatible 8-Bit ADC with Track/Hold Function The AD7821 is a high speed, 8-bit, sampling, analog-to-digitalconverter that offers improved performance over the popularAD7820. It offers a conversion time of 660 ns (versus 1.36 μsfor the AD7820) and 100 kHz signal bandwidth (versus 6.4kHz). The sampling instant is better defined and occurs on thefalling edge of WR or RD.