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Price $10.99


The PCF8591 is a single-chip, single-supply and 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 maximum of 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.


  • INPUT & OUTPUT - four channels for input, one channel for output.
  • COMMUNICATION - communicate via Serial I2C bus for input and output.
  • ANALOG VOLTAGE RANGE – from VSS to VDD, fit for your very needs.
  • 8-BIT A/D CONVERTER - Use an 8-bit successive approximation A/D converter.
  • SPECIFICATION - Working voltage: DC 2.5-6V; PCB size: 2.4 x 2.8 cm. 
  • For more information, please refer to http://wiki.sunfounder.cc/index.php?title=PCF8591_8-bit_A/D_and_D/A_converter_Module


  • Single supply, low standby current
  • Address by 3 hardware address pins
  • Sampling rate is given by I2C-bus speed
  • 4 analog inputs programmable as single-ended or differential inputs
  • Auto-incremented channel selection
  • Analog voltage range from VSS to VDD
  • On-chip track and hold circuit
  • Multiplying DAC with one analog output

Package List

  • AD/DA Converter PCF8591 module x 1
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    Good converter
    I've purchased a few of these in the past and can easily tell if the converter is good or not. The quality on this one is quite good, especially for the price. It's simple to use and is exactly what I expected.

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