Schematic review closed
16-channel isolated ±10 V ADC HAT
16-bit, 16-channel Raspberry Pi ADC HAT based on the TI ADS8686S, with an isolated ±10 V field side.
Open schematic PDF
This HAT is intended as an open Raspberry Pi measurement platform rather than a closed data logger. It combines the TI ADS8686S ADC with multiple industrial-voltage inputs, local storage, networking, triggering and custom software on the Raspberry Pi.
What is being reviewed
This review covers the first hardware revision of the ADC HAT, in particular:
- ADC input protection, filtering and ±10 V signal handling
- reference, regulator and supply decoupling
- isolation boundary and grounding concept
- Raspberry Pi SPI, CONVST and BUSY interface
- connector pinout and practical use in industrial measurement setups
Software, drivers and enclosure design are not part of this review.
Review scope
The review covered functional issues, data-sheet requirements and suggested improvements. Design files remain available for reference.
This review campaign and its free-HAT offer have ended.
Review topics
The review considered these questions:
- Is the input protection appropriate for real-world ±10 V signals?
- Are there any ADS8686S data-sheet requirements I have missed?
- Is the isolated-ground and reference-ground routing sound?
- Would you need a different trigger, synchronization or connector arrangement?
Design views
