官方授權台灣代理分銷
樹莓派高精度AD / DA板
資料來源：https://www.seeedstudio.com/Raspberry-Pi-High-Precision-AD%2FDA-Board-p-2765.html
Description
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.
Raspberry Pi 1 Model A+
Raspberry Pi 1 Model B+
Raspberry Pi 2 Model B
Raspberry Pi 3 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
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
| 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 |
Raspberry Pi High-Precision AD/DA Board＊1
Technical Details
| Dimensions | 110mm x 80mm x 30mm |
| Weight | G.W 37g |
| Battery | Exclude |
描述
還有的樹莓派GPIO接口上沒有AD / DA功能，這個可就麻煩了，你在郫縣發展。然而，這將不會是一個問題了。高精度AD / DA板，您可以高精度AD / DA功能添加到樹莓派。
樹莓派1型A +
樹莓派1型B +
樹莓派2 B型
樹莓派3 B型
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板載ADS1256，8CH 24位高精度ADC（4通道差分輸入），30ksps採樣率
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板載DAC8532，2CH 16位高精度DAC
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板載通過pinheaders輸入接口，用於連接模擬信號， 其引腳與bottom我傳感器接口標準兼容，方便連接各種模擬傳感器模塊
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板載通過螺釘端子輸入/輸出接口，用於連接模擬/數字信號
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特點AD / DA檢測電路，便於信號演示
1. 樹莓派GPIO接口：用於與皮連接
2，AD / DA輸入/輸出：螺絲端子
AD 3. 輸入：pinheaders，其引腳與bottom我傳感器接口標準兼容，方便連接各種模擬傳感器模塊
4. 7.68M CRYSTA 升
5. LM285-2.5：提供參考電壓的ADC芯片
6. 光敏電阻
7. LED輸出指示燈
8. 10K電位
9. DAC8532：16位高精度DAC，2聲道
10. 電源指示燈
11. ADS1256：24位高精度ADC，8通道（4通道差分輸入）
12. ADC測試跳線
13. DAC測試跳線
14. 電源選擇跳線
15. ADC參考地配置：當AD輸入單一的AINCOM為基準終端，可以連接到GND或外部參考電壓
| 符號 | 銷 | 描述 |
| 3.3V | 1，17 | 電源（3.3V） |
| 5V | 2,4 | 電源（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 | 地面 |
| DRDY | 11 | ADS1256數據就緒輸出，低電平有效 |
| 重啟 | 12 | ADS1256復位輸入 |
| PDWN | 13 | ADS1256同步/關閉電源輸入端，低電平有效 |
| CS0 | 15 |
ADS1256芯片選擇，低電平有效 |
| CS1 | 16 |
DAC8532的片選，低電平有效 |
| DIN | 19 | SPI數據輸入 |
| DOUT | 21 | SPI數據輸出 |
| SCK | 23 | SPI時鐘 |
| GPIO | 31，33，35，37 | 延伸到傳感器接口 |
樹莓派高精度AD / DA板* 1
