Raspberry Pi High-Precision AD/DA Expansion Board
Available with a lead time
Expect dispatch between Feb 03 and Feb 05
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
- Raspberry Pi GPIO interface: For connecting with the Raspberry Pi.
- AD/DA input/output: Screw terminals.
- AD input: Pinheaders compatible with Waveshare sensor interface standard for connecting analog sensor modules.
- 7.68M crystal: Provides a stable clock source.
- LM285-2.5: Reference voltage provider for the ADC chip.
- Photoresistor: Integrated for demonstrations.
- LED output indicator: For signal activity visualization.
- 10K potentiometer: Allows for variable resistance adjustments.
- DAC8552: 16-bit high-precision DAC with 2 channels.
- Power indicator: Displays power status.
- ADS1256: 24-bit high-precision ADC with 8 channels (4 differential inputs).
- ADC testing jumper: For diagnostic purposes.
- DAC testing jumper: For diagnostic purposes.
- Power selection jumper: Configures power input source.
- 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
Back view- Connecting with Raspberry Pi A+
- Connecting with Raspberry Pi 2 B
- Connecting with sensors
Back view
Connecting with Raspberry Pi A+
Connecting with Raspberry Pi 2 B
Connecting with sensorsNote: The Raspberry Pi and sensors shown in the images are not included.
Dimension
Resources
Exact shipping can be calculated on the view cart page (no login required).
Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).
We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):
- $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
- $7+ for Standard Post (typically 6+ business days, tracked)
- $11+ for Express Post (typically 2+ business days, tracked)
- Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.
Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.
International Orders - the following rates are for New Zealand and will vary for other countries:
- $12+ for Pack and Track (3+ days, tracked)
- $16+ for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
Have a product question? We're here to help!
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