PCF8591 8 bit ADC/ DAC

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 Features

    Single power supply
    Operating supply voltage 2.5 V to 6 V
    Low standby current
    Serial input/output via I2C-bus
    Address by 3 hardware address pins
    Sampling rate 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
    8-bit successive approximation A/D conversion
    Multiplying DAC with one analog output.

Supply Voltage    2.5V-6V
Resolution    8 Bits
Vdd (max.)    16
PCF8591 Other Features
Function    Converter
Type    ADC, DAC
Data Interface    Serial

Datasheet