Raspberry Pi High-Precision AD/DA Expansion Board

SKU: 11010
Part Number: High-Precision AD/DA Board


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Raspberry Pi AD/DA Expansion


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.


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

What's on Board

RPi expansion board on board resource
  1. Raspberry Pi GPIO interface : for connecting with the Pi
  2. AD/DA input/output : screw terminals
  3. AD input : pinheaders, 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 reference voltage for the ADC chip
  6. Photo resistor
  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 Definition

Pin Symbol Description
1, 17 3.3V Power supply (3.3V)
2, 4 5V Power supply (5V)
3, 5, 7, 8, 10, 18, 22, 24, 26, 27, 28, 29, 32, 36, 38, 40 NC NC
6, 9, 14, 20, 25, 30, 34, 39 GND Ground
11 DRDY ADS1256 data ready output, low active
12 RESET ADS1256 reset input
13 PDWN ADS1256 sync/power off input, low active
15 CS0 ADS1256 chip select, low active
16 CS1 DAC8552 chip select, low active
19 DIN SPI data input
21 DOUT SPI data output
23 SCK SPI clock
31, 33, 35, 37 GPIO extend to sensor interface


RPi expansion board
High-Precision AD/DA Board back view
RPi expansion board
Connecting with RPi A+
RPi expansion board
Connecting with RPi2 B
RPi expansion board
Connecting with sensors

Note : the Raspberry Pi and sensors in the photo are NOT included.


High-Precision AD/DA Board dimension

Development Resources

Wiki : www.waveshare.com/wiki/High-Precision_AD/DA_Board

Weight: 0.033 kg

Quick Overview

  1. High-Precision AD/DA Board x 1
  2. RPi screws pack (2pcs) x 1