ADAC Click

How does it work?

ADAC Click is based on the AD5593R, an 8-channel configurable ADC/DAC with an on-chip reference from Analog Device. You can enable internal reference voltage (2.5V internal) or apply your own reference voltage over the VREF pin of the terminal in a range from 1 to 5V (VCC SEL placed on 5V position). An integrated temperature indicator indicates the die temperature and can be read as part of the ADC read sequence. Depending on the configuration, the IO pin can be set as analog output and connected to a 12-bit DAC with an output range from 0V up to VREF or 0V up to 2x VREF. It can also be set as analog input and connected to a 12-bit ADC via an analog multiplexer with the same input range as DAC output. When using pins as general-purpose IO, you can read the states of the pins and write logic states over the I2C interface.

ADAC Click uses a standard 2-Wire I2C interface to communicate with the host MCU, supporting standard and fast modes of up to 400KHz. The I2C address can be selected over the ADD SEL jumper, with 0 selected by default. The AD5593R features a reset function that resets all to its default conditions by software or over the RST pin, which triggers the same function as the software. Resetting the device takes as much as 250μs.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the LOG SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. You can set the operating voltage over the VCC SEL jumper independently. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

Specifications

Pinout diagram

This table shows how the pinout on ADAC 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
Reset	RST	2	RST	INT	15	NC
	NC	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

ADAC Click electrical specifications

Software Support

ADAC Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

Example Description

This example showcases how to initialize, configure and use the ADAC Click module. The Click has an ADC and a DAC. An external power supply sets the maximum voltage of the input analog signal, which is bound to 2.5 V by default. For the input any external analog signal will suffice and a multimeter is needed to read the output on one of the channels.

Key Functions

• adac_cfg_setup Config Object Initialization function.
• adac_init Initialization function.
• adac_default_cfg Click Default Configuration function.
• adac_write_dac This function writes DAC using the I2C serial interface.
• adac_read_adc This function reads ADC data using the I2C serial interface.
• adac_set_configuration This function sets the configuration for the Click module.

Application Init

This function initializes and configures the Click and logger modules. It does a hardware reset first and after that configures the Click module using default settings.

Application Task

This function first writes digital values ranging from 0 to 256 to output channel 3 with a 10 millisecond delay between iterations and after that reads analog values from channel 4 10 times and displays results in the UART console.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.