High-Precision AD/DA Expansion Module ADS125 DAC855 for Raspberry Pi Jetson Nano

Description

Raspberry Pi AD/DA Expansion
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
Photos
High-Precision AD/DA Board back view
Connecting with RPi A+
Connecting with RPi2 B
Connecting with sensors
Note : the Raspberry Pi and sensors in the photo are NOT included.
Dimension
Development Resources
Wiki :
https://www.waveshare.com/wiki/High-Precision_AD/DA_Board
Package contains
High-Precision AD/DA Board x 1
RPi screws pack (2pcs) x 1
1
2