Part Number: MUX508
Hi Team,
Does MUX508 also support beyond-the -rail input function like MAX14572? As I didn't find any information description in the datasheet. You could refer to the screen shot below to apply this function in the below. Could you please also stress other difference between MUX508 and MAX14572 in application or internal structure? Thanks.
Hi Tess,
The MAX device does not pass voltages beyond rails - it has overvoltage protection. The MUX508 requires external protection devices such as TVS diodes to help with overvoltage protection.
The internal structure is going to be similar to the MAX device that you have shown. As you can see in the above table we have absolute maximums / minimums of analog signal input range with the addition of the internal ESD protection diodes forward voltage drops.
The MUX508 is a precision mid-voltage part - it doesn't offer extra protection benefits because its main benefit it has a minimal impact on the signal through the device. Protection devices would have to be added externally to offer extra protection.
The max device is a protection device + mux. The real benefit is that the Max part is about 3x more expensive than the MUX508 - the solution could still be potentially cheaper if external protection devices are added.
Please let me know if this is a possible solution.
Best,
Parker Dodson
