Description

• Description:
  

  PCF8591 is a single-supply, low-power 8 COMS-type A / D, D / A converter chip, it has a 4-channel analog input channels, all the way to the analog output channels and an I2C bus interface. The device I2C slave address lower three chips A0, A1 and A2, three address pins decision so without adding any hardware with an I2C bus can connect up to eight devices of the same type. The device has a multi-channel analog input, on-chip track-and-hold, 8 A / D conversion and eight D / A conversion functions. A / D and D / A conversion rate determined by a maximum transfer rate of the I2C bus.
  
  Characteristics:
  Single power supply;
  The normal operating supply voltage range of 2.5V ~ 6V;
  Completed through the I2C bus data input / output;
  Device address is determined by three address pins;
  The sampling frequency is decided by the I2C bus transfer rate;
  The 4 Road analog inputs programmable as single-ended or differential inputs;
  Can be configured to convert the channel number is automatically increased functionality;
  The analog voltage range of VSS ~ VDD;
  On-chip track-and-hold function;
  8-bit successive approximation A / D conversion;
  Multiplication with one analog output D / A converter.
  
  Module Description:
  Module chip with PCF8591T, SMD package
  Support 4 channel analog voltage the acquisition signal input (voltage input range of 0 - 5V)
  Module with power indicator 1 (D1)
  A module with DA output indicator (D2), when the DA output voltage reaches a certain value, the indicator light, the higher the voltage value, the brighter lights
  The module integrates a Road 0 - 5V voltage input acquisition (through the blue and white potentiometer to adjust the input voltage)
  The module Integrated Road the photoresistor (Model: 5537), ambient light intensity by AD collection
  Module integrated way thermistor (Model: MF58) ambient temperature by AD collection
  PCB size: 48mm * 25mm * 1.6mm
  Quality panel corners arc design will not scratch your hand. With a positioning hole aperture 3.1mm, easy to use 3mm Tongzhu fixed
  
  Wiring instructions:
  Left 4 pin:
  SDA IIC data interface connected microcontroller IO ports (P2.0)
  SCL IIC clock interface connected microcontroller IO port (P2.1)
  The cathode interface external VCC power 3.3/5V positive power supply
  GND Negative interface external 3.3/5V negative supply
  
  Right 8 pin
  AOUT module DA output port
  AIN3 analog input signal interface
  AIN2 analog input signal interface
  AIN1 analog input signal interface
  AIN0 analog input signal interface 0
  The INPUT3 analog input signal interface 3
  INPUT2 thermistor signal input port is connected to
  The INPUT1 has photoresistor signal input port connected to the
  INPUT0 is connected to the signal input port of the potentiometer
  
  Jumper cap Description:
  Select potentiometer 0 - 5V the adjustable voltage access circuit connecting the jumper cap AIN0 with INPUT0
  AIN1 and the the INPUT1 connection jumpers cap, select the the photoresistor access circuit
  AIN2 INPUT2 connect the jumper cap, thermistor access circuit
  External analog signal input is needed, disconnect the jumper cap, the analog signal access AIN0 ---- AIN3