share awesome hardware High-Precision AD-DA User Manual High-Precision AD/DA Board User Manual Overview There s no AD/DA function on the Raspberry Pi GPIO interface, this may troubled 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. Supported Pi Raspberry Pi 1 Model A+ Raspberry Pi 1 Model B+ Raspberry Pi 2 Model B 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 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 Revision: 1.2. Date: October 30 2015. Author: Zhou Jie. Editor: Felix share awesome hardware High-Precision AD-DA User Manual What s on Board 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 2 Revision: 1.2. Date: October 30 2015. Author: Zhou Jie. Editor: Felix