Hello everyone, I want to choose a switch to achieve the following functions:
1. S1 is connected, and S2, S3, and S4 are grounded.
S2 is connected, S1, S3, S4 are grounded.
S3 is connected, and S1, S2, and S4 are grounded.
S4 is connected, S1, S2, S3 are grounded (switch switching frequency is greater than 10KHz)
Attention : when switch is connected,it can't be grounded ! The switch is either connected or grounded!
2. The signal source is a square wave with amplitude of ±5~±8V and frequency of 10-20KHz.
3. Select STM32Fx series control switch on and off, so the address code terminal high level is less than or equal to 3.3V.
4. There is no requirement for the supply voltage and package form of the switch. There is no special requirement for the temperature range, and there is no special requirement for noise resistance.
There are two ways to connect to ensure that when one switch is closed, the remaining switches remain grounded, as shown in Figure 1 and Figure 2.
Figure 1 shows the single-pole double-throw switch at switch S. (Single-pole double-throw switch is grounded on one side and connected to the signal source on the other side)
Figure 2 shows the use of two types of analog switches, one of which is: one switch closed in n-Channel Analog Multiplexer, and the n-1 switch closed in n-Channel Analog Multiplexer at the same time.
So ,I have some questions as described following:
1. Whether the TMUX6119 can meet the above requirements for the single-pole double-throw switch connection method.
2. Is there any other types of single-pole double-throw switches can be selected?
3. For the connection method of Figure 2, the n-select 1 switch can use 74HCT4051 (of course, its high level is 5V).
But how to choose the analog switch whose n-Channel switch selects the n-1 Channel closed at the same time?
thank you very much!
Figure1 Single-pole double-throw switch
Figure2 Two types of analog switches
