AD4134
Recommended for New Designs
The AD4134 is a quad channel, low noise, simultaneous sampling, precision analog-to-digital converter (ADC) that delivers on functionality, performance...
Datasheet
AD4134 on Analog.com
Hello, we are planning on using AD4134 ADC in our application and were looking for ways to wire it up to the MCU properly. A little bit about the specifications of the project:
- We have 4 physically detached modules that contain a single AD4134 ADC each
- Each module is connected to an MCU (STM32H7) board with an FPC cable
- Each ADC samples 4 channels simultaniously at a speed of 8 ksps, however only one ADC at a time. For example, we would start sampling ADC0 and read the data for 5 seconds, then stop sampling ADC0, start sampling ADC1, read for 5 seconds, stop sampling etc. until all 4 ADCs are read, then repeat.
We read through your datasheet but still have issues understanding some things. If we understand correctly, we can use a single DOUT0 for reading out all of the data, given the rather slow 8 ksps sampling speed. Even better, from the datasheet we can also see that there is a minimum I/O mode, where the configuration and data readout is done over a single SPI bus, which seems to be something that would work best for us. However, it specifies wiring pin FORMAT0/CS to GND, meaning the ADC is ALWAYS active on that SPI line. Thus the question, using this Minimum I/O mode, can we potentially control the FORMAT0/CS line by the MCU and thus control and read the data from 4 separate ADCs at the same time on the same SPI line? And again what I mean by "at the same time", is that the readouts are multiplex instead of being done simultaniously.
