AD0809程序，ADC0809 是8 位逐次逼近型A/D转换器。它由一个8路模拟开关、一个地址锁存译码

　　器、一个A/D 转换器和一个三态输出锁存器组成（见图1）。多路开关可选通8个模拟通道，

　　允许8 路模拟量分时输入，共用A/D 转换器进行转换。三态输出锁器用于锁存A/D 转换完

　　的数字量，当OE 端为高电平时，才可以从三态输出锁存器取走转换完的数据。-AD0809 procedures, ADC0809 is an 8-bit successive approximation type A/D converter. It consists of an 8-channel analog switch, a latch address decoder, an A/D converter and a three-state output latch components (see Figure 1). Optional multi-pass switches 8 analog channels, allowing the volume of time 8-channel analog input, sharing of A/D converter to convert. Three-state output latch lock is used A/D conversion of the digital end, when OE is high-end only when the output from the tri-state latch data taken after the conversion.