PCF8591 Module Analog to Digital / Digital-Analog Converter Module with F-F Jumper Wire

This is a breakout board/Prototype Board for PCF8591 IC. The PCF8591 Module Analog to Digital / Digital-Analog Converter Module with F-F Jumper Wire 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.

---

PCF8591 IC Features

• Single power supply
• A PCF8591 operating voltage range of 2.5V-6V
• Low standby current
• Via I2C bus serial input/output
• PCF8591 by 3 hardware address pins addressing
• PCF8591 I2C bus speed sampling rate decided
• 4 analog inputs programmable single-ended or differential input
• Automatic incremental channel selection
• PCF8591 analog voltage range from VSS to VDD
• PCF8591 built-in track-and-hold circuit
• 8-bit successive approximation A / D converter
• 1 analog output DAC gain

---

Module Features

• The module supports external voltage input of the 4-way acquisition (voltage input range of 0-5v)
• The module integrated photoresistor by AD collection precise value of the ambient light intensity
• Module integrated thermistor by the precise value of the ambient temperature of the AD acquisition
• Module integrated 1 channel 0-5V voltage input acquisition (the blue potentiometer to adjust the input voltage)
• Modules with power indicator (for the module power supply indicator lights)
• Modules with DA output indicator, when the module DA output interface voltage reaches a certain value, will be lit panel the DA output indicator, the higher the voltage, the more obvious indicator brightness
• Module PCB size: 3.6cm x 2.3cm
• A standard double panel, thickness 1.6mm, nice layout, surrounded by a through-hole, aperture: 3mm, convenient fixed.

---

Module interface specification

The Left

• AOUT chip DA output interface
• AINO chip analog input interface 0
• AIN1 chip analog input interface 1
• AIN2 chip analog input interface 2
• AIN3 chip analog input interface 3

The Right

• SCL – IIC clock interface connected to microcontroller IO port
• SDA – IIC digital interface connected to microcontroller IO port
• GND – connected to ground
• VCC – connected to 3.3v-5v

Four red jumper-cap instruction

• P4 – connected to P4 shorting cap, select thermistor access circuit
• P5 – connect P5 shorting cap, select photoresistor access circuit
• P6 – connected to P6 shorting cap, select 0-5V adjustable voltage access circuit

---