Feature 1Onboard ADS1256, 8ch 24bit high-precision ADC (4ch differential input), 30ksps sampling rate 2Onboard DAC8532, 2ch 16bit high-precision DAC 3Onboard input interface via pinheaders, for connecting analog signal 4Onboard input/output interface via screw terminals, for connecting analog/digital signal 5Features AD/DA detect circuit, easy for signal demonstrationDescription: There's no AD/DA function on the for 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 for Raspberry Pi. Features: 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 Onboard input/output interface via screw terminals, for connecting analog/digital signal Features AD/DA detect circuit, easy for signal demonstration Extension Interfaces: For Raspberry Pi GPIO interface: for connecting with the Pi AD/DA input/output : screw terminals AD input : pinheaders, the pin out is compatible for 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 Specifications: Size: 65.07 * 59.21mm / 2.56 * 2.33in Package weight: 40g Compatibility: For Raspberry Pi A+/B+/2 B Package List: 1 x High-Precision AD/DA Board 1 x Screws pack (2 sets) Note: If you want more tutorials and instructions about this product, please contact us, we will send related information to you.