# Raspberry Pi High-Precision AD/DA Expansion Board

**Type:** Product page · **SKU:** WS-11010 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/raspberry-pi-high-precision-ad-da-expansion-board.html ([markdown](https://core-electronics.com.au/raspberry-pi-high-precision-ad-da-expansion-board.html.md))

Raspberry Pi AD/DA Expansion...

## Pricing

- **Price:** $57.05 (inc GST) — $51.86 AUD, exc GST
- **Quantity discounts:** 6+ $49.79 (exc GST) · 12+ $48.24 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 300 more in 12–19 days.

## Description

The Raspberry Pi lacks AD/DA functionality on its GPIO interface, which can be a challenge during development. The High-Precision AD/DA Board solves this issue, adding high-precision AD/DA functions to the Raspberry Pi.

### Features

- Standard Raspberry Pi 40PIN GPIO extension header, compatible with Raspberry Pi series boards and Jetson Nano.
- Onboard ADS1256, 8-channel 24-bit high-precision ADC (4 differential inputs) with a 30ksps sampling rate.
- Onboard DAC8552, 2-channel 16-bit high-precision DAC.
- Pinheaders for analog signal input, compatible with Waveshare sensor interface standard for easy sensor module integration.
- Screw terminals for analog/digital signal input/output.
- Features AD/DA detection circuits for signal demonstration.

### What's on Board

![High-Precision AD/DA Board layout](https://core-electronics.com.au/attachments/localcontent/High-Precision-AD-DA-Board-intro_452739306d1.jpg)

1. **Raspberry Pi GPIO interface:** For connecting with the Raspberry Pi.
2. **AD/DA input/output:** Screw terminals.
3. **AD input:** Pinheaders compatible with Waveshare sensor interface standard for connecting analog sensor modules.
4. **7.68M crystal:** Provides a stable clock source.
5. **LM285-2.5:** Reference voltage provider for the ADC chip.
6. **Photoresistor:** Integrated for demonstrations.
7. **LED output indicator:** For signal activity visualization.
8. **10K potentiometer:** Allows for variable resistance adjustments.
9. **DAC8552:** 16-bit high-precision DAC with 2 channels.
10. **Power indicator:** Displays power status.
11. **ADS1256:** 24-bit high-precision ADC with 8 channels (4 differential inputs).
12. **ADC testing jumper:** For diagnostic purposes.
13. **DAC testing jumper:** For diagnostic purposes.
14. **Power selection jumper:** Configures power input source.
15. **ADC reference ground configuration:** When AD is single-ended, AINCOM acts as a reference terminal and can connect to GND or an external reference voltage.

### Interface Definition

| Pin | Symbol | Description |
|---|---|---|
| 1, 17 | 3.3V | Power supply (3.3V) |
| 2, 4 | 5V | Power supply (5V) |
| 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 | Extended to sensor interface |

### Photos

- ![High-Precision AD/DA Board back view](https://core-electronics.com.au/attachments/localcontent/High-Precision-AD-DA-Board-2_2429705f14a.jpg) Back view
- ![High-Precision AD/DA Board connecting with Raspberry Pi A+](https://core-electronics.com.au/attachments/localcontent/High-Precision-AD-DA-Board-3_35107d10d3b.jpg) Connecting with Raspberry Pi A+
- ![High-Precision AD/DA Board connecting with Raspberry Pi 2 B](https://core-electronics.com.au/attachments/localcontent/High-Precision-AD-DA-Board-4_36930298d66.jpg) Connecting with Raspberry Pi 2 B
- ![High-Precision AD/DA Board connecting with sensors](https://core-electronics.com.au/attachments/localcontent/High-Precision-AD-DA-Board-5_381445457db.jpg) Connecting with sensors

**Note:** The Raspberry Pi and sensors shown in the images are not included.

### Dimension

![High-Precision AD/DA Board dimensions](https://core-electronics.com.au/attachments/localcontent/High-Precision-AD-DA-Board-size_2751216c6b8.jpg)

### Resources

- [Wiki for High-Precision AD/DA Board](https://www.waveshare.com/wiki/High-Precision-AD-DA-Board)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/W/S/WS-11010-1.jpg)