1. Low standby current.through the I2C bus serial input / output. 2. PCF8591 by 3 hardware address pins addressing. Sampling rate PCF8591 I2C bus rate decided. 3. 4 analog inputs programmable as single-ended or differential inputs.Automatic incremental channel selection 4. PCF8591 analog voltage range from VSS to VDD.PCF8591 built-in track and hold circuit. 5. 8-bit successive approximation A / D converter. through an analog output DAC gain. module chip using PCF8951 . 6. Working Voltage : 2.5-6V
