The PCF8591 Module(ADC-DAC) is a 8-bit CMOS data acquisition devices. It has the four analog inputs.The three address pins in PCF8591 can be used in hardware address programmed 8 PCF8591 device allows access to the same I2C bus, without the need for additional hardware.The two-wire bidirectional I2C bus is used to transmitted the input and output of the address, control and data signals and many more. IT has on chip track and hold circuit in-built.
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