PCF8591T/2

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