If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
您好，VDD=3.3V，VEE电压是多少？ 我认为您这里的电压设置有问题，所以导致无法切换4M 频率的信号，增大VDD，比如5V，或者给VEE负压，使得VDD-VEE>13V 再试试。
Control of analog signals up to 20 VP-P can be achieved by digital signal amplitudes of 4.5 V to 20 V (if VDD – VSS = 3 V, a VDD – VEE of up to 13 V can be
controlled; for VDD – VEE level differences above 13 V, a VDD – VSS of at least 4.5 V is required). For example, if VDD = +4.5 V, VSS = 0 V, and VEE = –13.5 V, analog signals from –13.5 V to +4.5 V can be controlled by digital inputs of 0 V to 5 V.
