โมดูลแปลงสัญญาณ D/A และ A/D PCF8591 module AD/DA conversion module analog-to-digital/digital-to-analog conversion to ...

A PCF8591 AD / DA chip introduced PCF8591 is a monolithic , single supply, low power ,8-bit CMOS data acquisition device . PCF8591 has four analog inputs, one analog output and a serial I2C bus interface . PCF8591 the three address pins A0, A1 and A2 can be used for programming the hardware address , allowing access to the same I2C- bus PCF8591 8 devices without the need for additional hardware. PCF8591 device on the input and output address, control and data signals are bi-directional two-wire I2C-bus for transmission in a serial manner . PCF8591 key performance indicators: - single power supply - PCF8591 operating voltage range of 2.5V-6V - Low Standby Current - via I2C -bus serial input / output - PCF8591 through 3 hardware address pins addressing - PCF8591 I2C bus speed sampling rate decision - 4 analog inputs programmable as single-ended or differential inputs - auto increment channel selection - PCF8591 analog voltage range from VSS to VDD - PCF8591 built-in track and hold circuit - 8-bit successive approximation A / D converter - Through an analog output of the DAC gain Two baby description - A module chip PCF8951 - 2 module supports an external 4-channel voltage input capture ( voltage input range 0-5v) - 3 module integration photoresistor , you can capture the ambient light intensity through the AD precise values - 4 module integrated thermistor temperature by exact numerical AD acquisition - 5 module integrates a channel 0-5V voltage input capture ( via the blue potentiometer adjustment input voltage ) - 6 module with power indicator ( the module after power indicator lights ) - 7 module with DA output indicator , when the module DA output interface voltage reaches a certain value , the board will be lit DA output indicator, the higher the voltage , the light intensity is more obvious ; - 8 Module PCB size : 3.6cm * 2.3cm - 9 standard double panel , thickness 1.6mm, nice layout , surrounded by a through hole , aperture : 3mm, convenient fixed Three module interface description This module expansion outside the left and right , respectively, 2-way pin header , respectively, as follows: DA output interface chip left AOUT AINO chip analog inputs 0 AIN1 chip analog inputs 1 AIN2 chip analog inputs 2 AIN3 chip analog input interface 3 Right SCL IIC clock interface connected microcontroller IO port SDA IIC digital interface connected microcontroller IO port GND Module to external ground VCC Power Interface External 3.3v-5v Four modules use red short cap There are three red module shorted cap, respectively function as follows : - Connect the shorting cap P4 P4 , select thermistor access circuit - Connect the shorting cap P5 P5 , select photoresistor access circuit - Connect the shorting cap P6 P6 , select 0-5V Adjustable voltage access circuit