ADC Click

ADC click carries the MCP3204 12-bit Analog-to-Digital converter. The click is designed to run on 3.3V by default. Place PWR SEL SMD jumper to 5V position if used with 5V systems. It communicates with the target microcontroller over SPI interface.

MCP3204 features

MCP3204 Analog-to-Digital converter features 25k samples/second, 4 input channels and low power consumption (500nA typical standby, 2µA max).

Reading Analog inputs

There are four analog input screw terminals for each of the supported A/D channels. We added two more terminals for GND reference. Each analog input voltage is converted to an appropriate 12-bit digital value, which can be read using industry standard SPI communication interface.

Specifications

Pinout diagram

This table shows how the pinout on ADC click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
	NC	2	RST	INT	15	NC
SPI Chip select	CS	3	CS	TX	14	NC
SPI clock	SCK	4	SCK	RX	13	NC
Serial data output	SDO	5	MISO	SCL	12	NC
Serial data input	SDI	6	MOSI	SDA	11	NC
Power supply	+3.3V	7	3.3V	5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

Jumpers and settings

There are two zero-ohm resistors (SMD jumpers): PWR SEL is used to determine whether 5V or 3.3V power supply is used, and REFERENCE to select either VCC or 4.096V as the voltage reference.