IC, Interface



PCF8591

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.

Features

• Single power supply
• Operating supply voltage 2.5 V to 6.0 V
• Low standby current
• Serial input/output via I2C-bus
• I2C address selection by 3 hardware address pins
• Max sampling rate given by I2C-bus speed
• 4 analog inputs configurable 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 analog-to-digital conversion
• Multiplying DAC with one analog output.
• Supply monitoring
• Reference setting
• Analog control loops

Pin


#10, IC.01.3.B

PCF8591 Block diagram
DataSheet