Description
This is a breakout board/Prototype Board for PCF8591 IC. 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.
PCF8591 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.
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 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 black jumper-cap instruction:-
P4 – connected to P4 shorting cap, select thermistor access circuit
P5 – connect P5 shorting cap, select photo resistor access circuit
P6 – connected to P6 shorting cap, select 0-5V adjustable voltage access circuit
