Isolated 16-Channel ADC HAT++ for Raspberry Pi
16-channel analog input HAT for Raspberry Pi with 16-bit resolution. Two ADC cores simultaneously sample one channel from each of the two eight-channel input banks.
The ADS8686S from Texas Instruments provides software-selectable bipolar input ranges. An isolated SPI interface and onboard isolated supply separate the analog inputs from the Raspberry Pi. HAT++ selects the chip-select and BUSY connections.
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Quick Facts
BE-IIS-HPP-ADC
B
Rev. B
BE-IIS-HPP-ADC-I
Key Features
- 16-bit ADS8686S dual ADC
- 16 inputs in two banks of eight
- Simultaneous A/B sampling
- Software-selectable input ranges
- 10 V, 5 V and 2.5 V
- Isolated SPI and power supply
- 20-pin analog connector
- HAT++ CS/BUSY selection
- GPIO23 conversion start
- 3.3 V and 5 V host supply
Product Description
The ADC HAT acquires single-ended voltage signals in ranges of 10 V, 5 V or 2.5 V. All inputs share the isolated analog ground, GND_ISO.
The host controls acquisition over SPI. Rev. A requires exclusive use of the MISO line; details are given in the HAT++ section.
Applications
- Technology evaluation
- Analog sensor acquisition
- Prototyping
- Education and laboratory use
- Voltage measurement
Raspberry Pi Compatibility
| Model | 32-bit | 64-bit |
|---|---|---|
| Raspberry Pi 2 | ✓ | |
| Raspberry Pi 3 | ✓ | ✓ |
| Raspberry Pi 4 | ✓ | ✓ |
| Raspberry Pi 5 | ✓ | ✓ |
| Raspberry Pi Zero | ✓ | |
| Raspberry Pi Zero 2 W | ✓ | ✓ |
-- indicates a host and operating system combination awaiting validation.
HAT Compatibility
| Standard | Supported |
|---|---|
| HAT | ✓ |
| HAT+ | ✓ |
| HAT++ | ✓ |