Other Parts Discussed in Thread: TMUX1208, TMUX1104
Tool/software:
Hi
we are developing a Mux system which was intended to switch a 100KHz square wave from ESP32 to 8 Channels based on the Select line.
the Mux we used for this is TMUX1108 (it is a bidirectional Mux so works on either directions)
The issue we are facing in our prototype testing is that strange Noise is getting induced on every channel even though they are not selected as per Select Lines Truth Table.
i attached the setup and the schematic of the setup we made for testing below
details of the Test Setup
1. ESP32-S3 Development Board for Controlling the select lines and Generating the 100Khz signal
2. TMUX1108 soldered onto a TSSOP-16 Breakout Board
3. connections made on Bread Board with Jumper wires
4. Logic analyser is a cheap 24Mhz 8-CH Logic analyser from Saleae
i also attached the Logic analyser output of the Channels below
To go into the deeper insights of the noise we observed
1. the noise is not the same all the time, sometimes the channels were very clean
2. we very often observed 52Hz noise even though the system is running off the Grid with an Unplugged Laptop.
3. Noise also seems to be inducing from the actual 100Khz signal we supplied to all Channels
4. if we ignore the noise, we are receiving the 100Khz signal as expected
5. the noise is persisting even if we added 10Kohm pull up resistors to the Channel lines just after the Mux
6. we observed the same issue with TMUX1208, TMUX1104
please help us with this, if the issue is with the setup or any other thing
