ADG731 vs. ADG732

Question

What is the difference between the ADG731 and ADG732? Is it just the difference in control mechanism (ADG731 uses SPI and ADG732 uses 5 separate input pins)? 
 I'm a beginner in need a 96:1 mux so thinking of using 3 of these and trying to understand the difference between them. 
 Thanks!

Christian · Accepted Answer

Hi garytmui ,

The difference between the two is the digital interface. The ADG731 is a 3-wire SPI-compatible device while the ADG732 is a parallel device with 5 digital inputs (A0-A4) plus the enable (EN) pin.

To create a 96:1 mux, you can use any of the following combinations such as 3 x 32:1 Mux, 6 x 16:1, or 12 x 8:1 Mux. It is easier to use three ADG731 plus another mux (4:1 configuration with one unused I/O pin) as this requires only 3 control lines compared to three ADG732 that require at least 15 control lines.

Let me know if you have any questions.

Best regards,
Christian

Christian · Answer

Hi garytmui ,

Upon checking, we only have 8:1 and dual 4:1 mux that are SPI-compatible in our portfolio. Those are ADGS1408, ADGS1409, ADGS1208, and ADGS1209. You can also try to use SPI-compatible 4-channel SPST switches by tying the output together. These are ADGS1612, ADGS1212, and ADGS1412.

Aside from the mentioned requirements, do you have other design considerations? This will help us identify the best part to your application.

Best regards,
Christian

Christian · Answer

Hi garytmui , All of the parts suggested above can be used in creating the 96:1 configuration. Best regards, Christian

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ADG731 vs. ADG732

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