PCF8591 AD / DA Converter Module Analog to digital conversion module

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PCF8591 AD / DA Converter Module Analog to digital conversion module

https://bogza.ro/index.php/PCF8591_AD_/_DA_Converter_Module_Analog_to_digital_conversion_module

Features

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:

  1. Single power supply;
  2. The normal operating supply voltage range of 2.5V ~ 6V;
  3. Completed through the I2C bus data input / output;
  4. Device address is determined by three address pins;
  5. The sampling frequency is decided by the I2C bus transfer rate;
  6. The 4 Road analog inputs programmable as single-ended or differential inputs;
  7. Can be configured to convert the channel number is automatically increased functionality;
  8. The analog voltage range of VSS ~ VDD;
  9. On-chip track-and-hold function;
  10. 8-bit successive approximation A / D conversion;
  11. 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 theINPUT0 is connected to the signal input port of the potentiometer
PCF8591 AD - DA Converter Module Analog to digital conversion module


The PCF8591 module consists of a master control chip PCF8591, some resistors and capacitors .It can data acquisition device and has four analog inputs, one analog output and a serial I2C-bus interface. Three address pins A0, A1 and A2 are used for programming the hardware address, allowing the use of up to eight devices connected to the I2C-bus without additional hardware. Address, control and data to and from the device are transferred serially via the two-line bidirectional I2C-bus. The schematic diagram of the module is as follows: PCF8591 AD module schematic.png

Note:
From the schematic diagram, a potentiometer is connected to AIN0. You can connect the P3 by the jumper cap, which is to wire the two pins next to the pot, so the pot can be used as the input of AIN0.

PCF8591

The PCF8591 is a single-chip, single-supply low power 8-bit CMOS data acquisition device with four analog inputs, one analog output and a serial I2C-bus interface. Three address pins A0, A1 and A2 are used for programming the hardware address, allowing the use of up to eight devices connected to the I2C-bus without additional hardware. Address, control and data to and from the device are transferred serially via the two-line bidirectional I2C-bus. The functions of the device include analog input multiplexing, on-chip track and hold function, 8-bit analog-to-digital conversion and an 8-bit digital-to-analog conversion. The maximum conversion rate is given by the maximum speed of the I2C-bus.

Block Diagram

PCF8591 AD block diagram.png

Pin Function

PCF8591 AD pin function package.png PCF8591 AD pin function.png

Features

  • Support acquisition of external 4-line voltage inputs (ranging 0-5v), with a single power supply
  • Standard double-sided printed circuit board, 1.16mm thick, with an elegant layout, 3-mm holes at each corner for easy fixing
  • Use an 8-bit successive approximation A/D converter
  • Input/output by an I2C bus
  • Working voltage: 2.5-6V DC; PCB size: 2.4 x 2.8 cm
  • Single supply, low standby current
  • Address by 3 hardware address pins

Resource

Data sheet

Test Experiment for Arduino

Test Experiment for Raspberry Pi