Is TS5A3159A able to work with 10Mhz SPI signals? How about device's slew rate?
Regards
Brian W
Hi Brian,
Yes the typical bandwidth is 100MHz so the 10MHz SPI signals shouldn't be an issue.
As for slew rate we don't spec it per se because it is highly dependent on system setup. However, a multiplexer is essentially just an RC charging circuit when the switch path is closed. A simplified sketch of the basic circuit is below:
The slew rate is dependent on how fast the capacitors charge on the output, so it is going to be related to the RC time constant of the circuit. The best way to check what the approximate slew rate is, is to simulate the circuit using the passive model.
See below for an example. I used the 5V specifications for TS5A3159A, a load capacitance of 50pF, and a load resistance of 100k Ohms. The source is a 10MHz square wave with 1ns rise/fall times that swings between 0V and 5V. This will change depending on your exact system, but the logic is the same.
From this example we get a 5.02V rise in 1.38ns which is a slew rate of 3.638 kV / us for this particular example.
If there is anything else I can help you with please let me know!
Best,
Parker Dodson
