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
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
Applications:
Closed loop control systems
Low power converter for remote data acquisition
Battery operated equipment
Acquisition of analog values in automotive, audio and TV applications