Just throwing this out there to see if it is a possibility, and yes, I do know you can get a single ADC with multiple channels to do simultaneous ADC readings. But, if I have a daisy chainable ADC, you think it would be possible to daisy chain them have have them all do simultaneous readings? I would imagine that it would require a Start read pin as well? Or if the chip architecture was clever enough, there would be some way to control the reading and acquisition through the cs pin?

 

hi,
What is the part number or type of your daisy chain ADC?
E

 

One way to do simultaneous readings is to use a sample & hold circuit at each channel.
You sample all at the same time, and then convert them sequentially by the A/D before the next sample.

 

One way to do simultaneous readings is to use a sample & hold circuit at each channel.
You sample all at the same time, and then convert them sequentially by the A/D before the next sample.

never designed a sample and hold, but it looks like a peak detector, but with a fet instead of diodes?

 

hi,
What is the part number or type of your daisy chain ADC?
E

I have not chosen one, but I looked around and stumbled upon the ADS8864, which has an example on the datasheet. On the pricier side though.....

 

never designed a sample and hold,

Building discrete sample-and-hold circuit for accurate, fast operation is somewhat difficult.
Better to buy an IC that does that, such as this.

 

Building discrete sample-and-hold circuit for accurate, fast operation is somewhat difficult.
Better to buy an IC that does that, such as this.

Nice...I appreciate the name of the IC. No secrets to what it does....