Waveshare High-Precision AD DA Expansion Board ADS1256 DAC8552 for Raspberry Pi

Item number: WS9302B

Manufacturer Part Number: High-Precision AD/DA Board


Category: Schields

32,95 €

including 19% VAT.,

Available now!

Shipping time: 1 - 2 workdays



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.

Supported Pi

  • Raspberry Pi 1 Model A+
  • Raspberry Pi 1 Model B+
  • Raspberry Pi 2 Model B


  • Onboard ADS1256, 8ch 24bit high-precision ADC (4ch differential input), 30ksps sampling rate
  • Onboard DAC8532, 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. DAC8532 : 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 DAC8532 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


High-Precision AD/DA Board dimension

Development Resources

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

Packing list

Weight: 0.032 kg

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

Product weight: 0,03 Kg

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