Hi, is the MAX11410BOB simultaneous sampling?
I understand the MAX11131 features a sample-and-hold for each analogue input that captures a simultaneous sample when CNVST is pulled low.
so the conversion happens after sampling - meaning all channels are simultaneous?

The chip does mention a Analogue Multiplexer, but this is done post-sample and hold(?)
https://www.analog.com/media/en/technical-documentation/data-sheets/max11129-max11132.pdf

 

No. A quick look at the datasheet shows sequence switching of channels to one SH. A 16 channel scan NT limit is about 95 KHz. How much timing variation can you tolerate between channel conversions at the measurement signal frequency?

 

The MAX11131 does not support true simultaneous sampling across all channels like a SAR ADC with multiple ADC cores would.
Instead, it uses sample-and-hold (S/H) circuits on each channel.

 

No. A quick look at the datasheet shows sequence switching of channels to one SH. A 16 channel scan NT limit is about 95 KHz. How much timing variation can you tolerate between channel conversions at the measurement signal frequency?

Many thanks for replying, I'm looking to sample at 20KHz across 9 channels

 

The MAX11131 does not support true simultaneous sampling across all channels like a SAR ADC with multiple ADC cores would.
Instead, it uses sample-and-hold (S/H) circuits on each channel.

Thanks for the reply, yes I thought a sample and hold on each channel would be ok for that.
I've ordered the MAX11410BOB eval kit for can use this; signal input (9 microphones) -> s/h -> ADC MAX11410BOB board -> SPI

 

Thanks for the reply, yes I thought a sample and hold on each channel would be ok for that.
I've ordered the MAX11410BOB eval kit for can use this; signal input (9 microphones) -> s/h -> ADC MAX11410BOB board -> SPI

It all depends on the device driver doing a fast auto scan and the SPI host being able to buffer and process the data. DMA with deep buffers should handle it easily for the capture and a good hardware DSP will be needed for processing the needed transformations back to frequency domain signals.