GENERAL DESCRIPTION

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.

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.

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.