114990831

Raspberry Pi High-Precision AD/DA Board SKU 114990831 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. Description 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. Raspberry Pi 1 Model A+ Raspberry Pi 1 Model B+ Raspberry Pi 2 Model B Raspberry Pi 3 Model B      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.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 Symbol Pin Description 3.3V 1, 17 Power supply (3.3V) 5V 2, 4 Power supply (5V) NC 3, 5, 7, 8, 10, 18, 22, 24, 26, 27, 28, 29, 32, 36, 38, 40 NC GND 6, 9, 14, 20, 25, 30, 34, 39 Ground DRDY 11 ADS1256 data ready output, low active RESET 12 ADS1256 reset input PDWN 13 ADS1256 sync/power off input, low active CS0 15 ADS1256 chip select, low active CS1 16 DAC8532 chip select, low active DIN 19 SPI data input DOUT 21 SPI data output SCK 23 SPI clock GPIO 31, 33, 35, 37 extend to sensor interface Raspberry Pi High-Precision AD/DA Board＊1 Copyright © 2008-2016 Seeed Development Limited All rights reserved