ADC 17 Click

How does it work?

ADC 17 Click as its foundation uses the MAX11645, a high-performance two-channel analog-to-digital converter (ADC) from Analog Devices. The MAX11645 uses successive-approximation conversion technique and fully differential input track/hold (T/H) circuitry to capture and convert an analog signal to a serial 12-bit digital output. It can measure either two single-ended or one differential input(s).

The MAX11645 is capable of sample rates up to 94ksps. By taking advantage of the ADC’s high sample rate, multiple channels can be converted in a short period. This capability allows the device to spend more time in shutdown mode, reducing total power consumption. It also includes a 2.048V internal reference which determines its full-scale analog input range. The fully differential analog inputs are software configurable for unipolar or bipolar applications; input signals from 0 to VREF (unipolar) or ±VREF/2 (bipolar) range can be resolved with accurate 12-bit accuracy.

ADC 17 Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing 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 ADC 17 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
	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	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

ADC 17 Click electrical specifications

Software Support

We provide a library for the ADC 17 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for ADC 17 Click driver.

Key functions

• adc17_set_channel This function sets the selected channel active by modifying the config byte.

• adc17_get_voltage This function reads the voltage from the previously selected channel by using I2C serial interface.

• adc17_write_setup_byte This function writes a setup byte to the ADC chip by using I2C serial interface.

Example Description

This example demonstrates the use of ADC 17 Click board™ by reading the voltage from the two analog input channels.

void application_task ( void ) 
 { 
     float voltage; 
     if ( ADC17_OK == adc17_set_channel ( &adc17, ADC17_CHANNEL_0 ) ) 
     { 
         if ( ADC17_OK == adc17_get_voltage ( &adc17, &voltage ) ) 
         { 
             log_printf ( &logger, " AIN0 voltage: %.3f V rnn", voltage ); 
         } 
     } 
     if ( ADC17_OK == adc17_set_channel ( &adc17, ADC17_CHANNEL_1 ) ) 
     { 
         if ( ADC17_OK == adc17_get_voltage ( &adc17, &voltage ) ) 
         { 
             log_printf ( &logger, " AIN1 voltage: %.3f V rnn", voltage ); 
         } 
     } 
     Delay_ms ( 500 ); 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.ADC17

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.