2.5V to 6V
2.5V to 6V
-40C to 85C
8-bit
4
8-bit
1
I2C
Up to 200 kHz
1.5 mA (typical)
Pinout
| The PCF8591 ADC-DAC Converter Module has the following pinout |
Supply voltage (2.5V to 6V)
Ground
I2C clock signal
I2C data signal
| AIN0-AIN3 | Analog input channels 0-3 |
Analog output signal
Conclusion
The PCF8591 ADC-DAC Converter Module is a versatile and reliable component for various applications in IoT, robotics, and automation. Its compact design, low power consumption, and high accuracy make it an ideal choice for projects requiring analog-to-digital and digital-to-analog conversion.
PCF8591 ADC-DAC Converter Module DocumentationOverviewThe PCF8591 ADC-DAC Converter Module is a compact, low-power module that integrates an 8-bit analog-to-digital converter (ADC) and an 8-bit digital-to-analog converter (DAC) on a single chip. This module is ideal for applications requiring analog-to-digital and digital-to-analog conversions, such as in IoT projects, robotics, and industrial automation.Features8-bit ADC with 256 levels of resolution
8-bit DAC with 256 levels of resolution
Four analog input channels for ADC
One analog output channel for DAC
I2C interface for communication with microcontrollers
Operating voltage: 2.5V to 6V
Low power consumptionTechnical SpecificationsADC Conversion Time: 100 s
DAC Settling Time: 20 s
I2C Clock Frequency: 100 kHz to 400 kHzCode Examples### Example 1: Reading Analog Values using ADC (Arduino)In this example, we will use the PCF8591 module to read analog values from a potentiometer connected to one of the ADC channels.```c++
#include <Wire.h>#define PCF8591_ADDRESS 0x48 // Default I2C address of PCF8591void setup() {
Wire.begin(); // Initialize I2C interface
Serial.begin(9600); // Initialize serial communication
}void loop() {
int adcValue = readADC(0); // Read analog value from channel 0
Serial.print("Analog Value: ");
Serial.println(adcValue);
delay(100);
}int readADC(int channel) {
Wire.beginTransmission(PCF8591_ADDRESS);
Wire.write(0x04 | (channel << 2)); // Select ADC channel
Wire.endTransmission();
Wire.requestFrom(PCF8591_ADDRESS, 1);
int adcValue = Wire.read();
return adcValue;
}
```### Example 2: Generating Analog Signal using DAC (Raspberry Pi with Python)In this example, we will use the PCF8591 module to generate an analog signal using the DAC output channel.```python
import smbus
import timebus = smbus.SMBus(1) # Initialize I2C bus on Raspberry Pipcf8591_address = 0x48 # Default I2C address of PCF8591def writeDAC(value):
bus.write_byte(pcf8591_address, 0x40 | (value & 0x0F)) # Set DAC output valuewhile True:
for i in range(0, 256): # Generate analog signal from 0 to 5V
writeDAC(i)
time.sleep(0.01)
```### Example 3: Analog-to-Digital and Digital-to-Analog Conversion (ESP32 with MicroPython)In this example, we will use the PCF8591 module to perform analog-to-digital and digital-to-analog conversions.```python
import i2cpcf8591_address = 0x48 # Default I2C address of PCF8591i2c.init(I2CNum.I2C_NUM_0, freq=400000) # Initialize I2C interface on ESP32def readADC(channel):
i2c.start()
i2c.writeto(pcf8591_address, bytearray([0x04 | (channel << 2)]))
i2c.stop()
i2c.start()
i2c.writeto(pcf8591_address, bytearray([0x00]))
adc_value = i2c.readfrom(pcf8591_address, 1)[0]
i2c.stop()
return adc_valuedef writeDAC(value):
i2c.start()
i2c.writeto(pcf8591_address, bytearray([0x40 | (value & 0x0F)]))
i2c.stop()while True:
adc_value = readADC(0) # Read analog value from channel 0
print("Analog Value:", adc_value)
writeDAC(adc_value) # Output analog signal using DAC
time.sleep(0.1)
```These code examples demonstrate how to use the PCF8591 ADC-DAC Converter Module in various contexts, including reading analog values, generating analog signals, and performing analog-to-digital and digital-to-analog conversions.