Waveshare Raspberry Pi High-Precision AD/DA Expansion Board

There’s no AD/DA function on the Raspberry Pi GPIO interface, this may trouble you in the Pi development. However, it won’t be a problem anymore. The High-Precision AD/DA Board allows you to add high-precision AD/DA functions to the Raspberry Pi.

What’s on Board

1. Raspberry Pi GPIO interface: for connecting with the Pi
2. AD/DA input/output : screw terminals
3. AD input: pin headers, the pinout is compatible with Waveshare sensor interface standard, easy to connect various analog sensor modules
4. 7.68M crystal
5. LM285-2.5: provides the reference voltage for the ADC chip
6. Photoresistor
7. LED output indicator
8. 10K potentiometer
9. DAC8552 : 16bit high-precision DAC, 2ch
10. Power indicator
11. ADS1256 : 24bit high-precision ADC, 8ch (4ch differential input)
12. ADC testing jumper
13. DAC testing jumper
14. Power selection jumper
15. ADC reference ground configuration: when AD single inputted, the AINCOM is reference terminal, can be connected to GND or external reference voltage

Useful links:

Interfacing of Waveshare Raspberry Pi High-Precision AD/DA Expansion Board

Features:

1. Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano.
2. ADS1256, 8ch 24bit high-precision ADC (4ch differential input), 30ksps sampling rate.
3. DAC8552, 2ch 16bit high-precision DAC.
4. Input interface via pin headers, for connecting analog signal.
5. The pinout is compatible with the Waveshare sensor interface standard, easy to connect various analog sensor modules.
6. Onboard input/output interface via screw terminals, for connecting analog/digital signal.
7. Features AD/DA detect circuit, easy for signal demonstration.

Package Includes:

1 x High-Precision AD/DA Board

1 x RPi screws pack (2pcs)