PCF8591 Application Note

●The PCF8591T/2,518 is a single-chip, single supply low power 8-bit CMOS data acquisition device with four analogue inputs, one analogue 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 analogue input multiplexing, on-chip track and hold function, 8-bit analogue-to-digital conversion and an 8-bit digital-to-analogue conversion. The maximum conversion rate is given by the maximum speed of the I²C-bus.

● Single power supply

● Low standby current

● Serial input/output via I²C-bus

● I²C address selection by 3 hardware address pins

● Maximum sampling rate given by I²C-bus speed

● 4 Analogue inputs configurable as single ended or differential inputs

● Auto-incremented channel selection

● Analogue voltage range from VSS to VDD

● On-chip track and hold circuit

● Multiplying DAC with one analogue output

●ESD sensitive device, take proper precaution while handling the device.