Tri state Mosfet switch

[andrea_mori]

The following pictures show the FDS8958A plots at 45 and 443 kHz drived by 74AC family. I believe that driving it by 74AHC family the ground bounce will be better.
Keep in mind that the max switching frequency I need is 192kHz. The rise of the waveform is still good at 443kHz.


Following your suggestion I have took a look at the analog switches design. If I understand correctly you suggest to implement a level shifter for each switch, that's a great issue because I have to control 98 switches.
So I should shift the level of the registers that drive the switches instead of each single switch driver. I should get the shift registers (74AHC595) to swing between +/-5V instead of 0V/+5V or 0V/-5V.
Is there a way to do so?

 

[FvM]

I should get the shift registers (74AHC595) to swing between +/-5V instead of 0V/+5V or 0V/-5V.
Is there a way to do so?

74AHC and other fast CMOS series have maximum Vcc recommendation of 5.5V, with the exception of a few devices like 74HC4053 analog switches, that can be used as +/-5V level converter.

 

[andrea_mori]

Well, 4053 can be used to control M1/M2, but since it adds delay, to get balanced delay on each part of the switch, I also have to use it to add the same delay to M3/M4 parts.
So I need one 4053 for each switch, for a total of 98 parts.

Any other idea to decrease the number of parts?