1.Single power supply.

2.PCF8591 operating voltage range of 2.5V-6V.

3.Low standby current.

4.Via I2C bus serial input / output.

5.PCF8591 by 3 hardware address pins addressing.

6.PCF8591 I2C bus speed sampling rate decision.

7.4 analog inputs programmable as single-ended or differential input.

8.Automatic incremental channel selection.

9.PCF8591 analog voltage range from VSS to VDD.

10.PCF8591 built-track and hold circuit.

11.8-bit successive approximation A / D converter.

12.DAC gain realized by an analog output.