# Raspberry Pi High-Precision AD/DA Board (Seeed Studio)

**Type:** Product page · **SKU:** SS114990831 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/raspberry-pi-high-precision-ad-da-board-seeed-studio.html ([markdown](https://core-electronics.com.au/raspberry-pi-high-precision-ad-da-board-seeed-studio.html.md))

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...

## Pricing

- **Price:** $104.95 (inc GST) — $95.41 AUD, exc GST
- **Quantity discounts:** 5+ $91.59 (exc GST) · 10+ $88.73 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## Description

![??.jpg](https://core-electronics.com.au/attachments/localcontent/1479975037128121_20999ae3fb5.jpg)

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.

![??2.jpg](https://core-electronics.com.au/attachments/localcontent/1479975047754541_1173193406b.jpg)

Raspberry Pi 1 Model A+

Raspberry Pi 1 Model B+

Raspberry Pi 2 Model B

Raspberry Pi 3 Model B

![??3.jpg](https://core-electronics.com.au/attachments/localcontent/1479975067266453_9144480973.jpg)

- 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

![??4.jpg](https://core-electronics.com.au/attachments/localcontent/1479975151121642_10702e37492.jpg)

![High-Precision-AD-DA-Board-intro.jpg](https://core-electronics.com.au/attachments/localcontent/1479975193839819_4465736965f.jpg)

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

**![??12.jpg](https://core-electronics.com.au/attachments/localcontent/1479975748931456_11497b1c37d.jpg)**

| Symbol | Pin | Description |
|---|---|---|
| 3.3V | 1, 17 | Power supply (3.3V) |
| 5V | 2, 4 | Power supply (5V) |
| NC | 3, 5, 7, 8, 10, 18, 22, 24, 26, 27, 28, 29, 32, 36, 38, 40 | NC |
| GND | 6, 9, 14, 20, 25, 30, 34, 39 | Ground |
| DRDY | 11 | ADS1256 data ready output, low active |
| RESET | 12 | ADS1256 reset input |
| PDWN | 13 | ADS1256 sync/power off input, low active |
| CS0 | 15 | ADS1256 chip select, low active |
| CS1 | 16 | DAC8532 chip select, low active |
| DIN | 19 | SPI data input |
| DOUT | 21 | SPI data output |
| SCK | 23 | SPI clock |
| GPIO | 31, 33, 35, 37 | extend to sensor interface |

![dimensions.jpg](https://core-electronics.com.au/attachments/localcontent/1479978905300082_8811c2be63.jpg)

![High-Precision-AD-DA-Board-size.jpg](https://core-electronics.com.au/attachments/localcontent/1479978924633535_2751216c6b8.jpg)

![partlist.jpg](https://core-electronics.com.au/attachments/localcontent/1479978937933397_77243e13d8.jpg)

Raspberry Pi High-Precision AD/DA Board\*1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/b/z/bz3qwd0oisc3l1wadwuj9ywm.jpg)