1，初始化：

如果AD7705复位引脚直连VCC，最好在初始化程序中加入初始化序列，不然ready信号不会输出。

2，输入范围

如果AD7705采集单端信号，则输入必须在0到VDD之间，而不可以超出或为负，如果一个输入为负，则另一个输入会有灌入电流的现象，芯片无法正常运行。-AD7705 is a complete 16-bit A ö D converter. Within

Structure in Figure 1. If the external crystal oscillator, precision voltage reference and less

Amount of decoupling capacitance, A ö D to continuous conversion. It uses a

But lower-cost access to high-resolution 2- $ conversion technology

Operation, error-free access to 16-bit data output. This is a very

Consistent with the higher resolution but less demanding digital conversion

Applications such as digital audio products and intelligent instrumentation products.

Following a few important part of the device for a brief descr iption and characteristics.

AD7705 programmable gain amplifier includes two full-differential

Sub-channel analog input.-Chip programmable gain amplifier PGA

Eight selectable gain 1,2,4,8,16,32,64,128

One can swing the scope of different types of input signal amplification to close

A ö D converter full scale voltage converter A ö D again, this favorable

On improving the q