我在使用ADC141S626,手册上对输出是这样定义的:
As shown in Figure 8 for a fully differential input signal, a pos-
itive full scale output code (01 1111 1111 1111b or 1FFFh or
8191d) will be obtained when (+IN) − (−IN) is greater than or
equal to (VREF − 1 LSB). A negative full scale code (10 0000
0000 0000b or 2000h or -8192d) will be obtained when (+IN)
− (−IN) is less than or equal to (−VREF + 1 LSB).
我却得到了A/D值是3FC3H等等, 超出了手册的规定, 这是什么问题? 什么原因造成的呢 ?
请教各位老师了,表示感谢。
Van Yang:
你好,请详述你的测试条件和现象,最好有电路图和波形截图以便分析