High-Precision AD/DA Expansion Board for Raspberry Pi

There's no Analog-to-Digital/Digital-to-Analog (AD/DA) function on the Raspberry Pi GPIO interface, which can restrict the use of certain components in your project. This High-Precision AD/DA Board allows you to add high-precision AD/DA functions to your Raspberry Pi!

Note: Sensors pictured but not included!

Features

• Standard Raspberry Pi 40-pin GPIO extension header
• Onboard ADS1256, 8-channel 24-bit high-precision ADC (4ch differential input), 30ksps sampling rate
• Onboard DAC8552, 2-ch 16-bit high-precision DAC
• Onboard input interface via pin headers, for connecting analogue signal
  • the pinout is compatible with Waveshare sensor interface standard, easy to connect various analogue sensor modules
• Onboard input/output interface via screw terminals, for connecting analogue/digital signal
• Features AD/DA detect circuit, easy for signal demonstration

Resources

• Product Wiki and guide

What's onboard?

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 analogue 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

Interface