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
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