资 源 简 介
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. The provision of a VSS pin (Pin 19)allows the part to operate from ±5 V supplies and to digiTIzebipolar input signals. AlternaTIvely, for unipolar inputs, the VSS pincan be grounded and the AD7821 will operate from a single +5 Vsupply, like the AD7820.
