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Overview
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.
Features
- Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
- Onboard ADS1256, 8ch 24bit high-precision ADC (4ch differential input), 30ksps sampling rate
- Onboard DAC8552, 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
- Raspberry Pi GPIO interface : for connecting with the Pi
- AD/DA input/output : screw terminals
- AD input : pinheaders, the pinout is compatible with Waveshare sensor interface standard, easy to connect various analog sensor modules
- 7.68M crystal
- LM285-2.5 : provides reference voltage for the ADC chip
- Photo resistor
- LED output indicator
- 10K potentiometer
- DAC8552 : 16bit high-precision DAC, 2ch
- Power indicator
- ADS1256 : 24bit high-precision ADC, 8ch (4ch differential input)
- ADC testing jumper
- DAC testing jumper
- Power selection jumper
- 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
DAC8552 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
Note : the Raspberry Pi and sensors in the photo are NOT included.
Dimension
Development Resources