LIN Hall 2 Click

How does it work?

LIN Hall 2 Click is based on the TMAG5253, a low-power linear Hall-effect sensor from Texas Instruments. This device uses a ratiometric architecture to eliminate errors from VCC tolerance, as the external analog-to-digital converter (ADC) uses the same VCC for its reference. Additionally, the device features magnet temperature compensation for NdFeB and Ferrite to counteract the magnetic sensitivity drifts across a wide temperature range. It fully integrates the signal conditioning, temperature compensation circuits, mechanical stress cancellation, and output driver. The TMAG5253 is sensitive to the magnetic field component perpendicular to the sensor’s top side. It also has a bipolar sensitivity where the north and south magnetic poles produce unique output voltages.

LIN Hall 2 Click uses an analog-to-digital converter (ADC) of the host MCU to read the analog values of the TMAG5253. The enable EN pin allows you to put the device in an ultra-low power (nA) mode when needed.

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. Also, it 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 LIN Hall 2 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Analog Output	AN	1	AN	PWM	16	NC
Chip Enable	EN	2	RST	INT	15	NC
ID COMM	CS	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

LIN Hall 2 Click electrical specifications

Software Support

We provide a library for the LIN Hall 2 Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE development boards.

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

Library Description

This library contains API for LIN Hall 2 Click driver.

Key functions

• linhall2_read_an_pin_voltage LIN Hall 2 read AN pin voltage level function.

• linhal2_set_en_pin LIN Hall 2 set EN pin state function.

• linhal2_get_flux_density LIN Hall 2 read flux density function.

Example Description

This is an example which demonstrates the use of LIN Hall 2 Click board by measuring magnetic field density and showing it in mT as well as detecting the orientation of the magnet.

 void application_task ( void )  
 { 
     float mag_flux = 0; 
     if ( LINHALL2_OK == linhal2_get_flux_density ( &linhall2, &mag_flux ) )  
     { 
         log_printf( &logger, " Magnetic flux density: %.3f[mT]rn", mag_flux ); 
         if ( 0 < mag_flux ) 
         { 
             log_printf( &logger, " Magnetic field oriented South rnn" ); 
         } 
         else 
         { 
             log_printf( &logger, " Magnetic field oriented North rnn" ); 
         } 
         Delay_ms( 1000 ); 
     } 
 }

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

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.LINHall2

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 MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE 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.