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PCF8591 Series Datasheet

PCF8591

Analog-to-digital Converter

PCF8591 is a monolithic integrated, separate power supply, low power consumption, 8-bit CMOS data acquisition device. PCF8591 has 4 analog inputs, 1 analog output and 1 serial I²C bus interface. The 3 address pins A0, A1 and A2 of PCF8591 can be used for hardware address programming, allowing 8 PCF8591 devices to be connected to the same I2C bus without additional hardware.

PCF8591 Data sheet.pdf

PCF8591 Pin Configuration and Function

PCF8591Pin Configuration and Function

Pin Number	Pin Name	Description
1	AIN0	analog inputs (A/D converter)
2	AIN1	analog inputs (A/D converter)
3	AIN2	analog inputs (A/D converter)
4	AIN3	analog inputs (A/D converter)
5	A0	hardware slave address
6	A1	hardware slave address
7	A2	hardware slave address
8	VSS	ground supply voltage
9	SDA	I2C-bus serial data input and output
10	SCL	I2C-bus serial clock input
11	OSC	oscillator input/output
12	EXT	external/internal switch for oscillator input
13	AGND	analog ground supply
14	VREF	voltage reference input
15	AOUT	analog output (D/A converter)
16	VDD	supply voltage