Mikroelektronika d.o.o.
Carte à clic ADC 13
Carte à clic ADC 13
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Key Features:
- Faible consommation d'énergie, faible bruit et dérive, PGA intégré, moniteurs de défauts internes, 11 entrées analogiques multifonctions, haute précision, et plus encore
- Basé sur l'ADS1262 - ADC à faible bruit, faible dérive, 38,4 kSPS, delta-sigma (ΔΣ) avec un PGA intégré, une référence et des moniteurs de défauts internes de Texas Instruments
- Peut être utilisé pour les applications de capteurs les plus exigeantes, notamment les balances, les capteurs à jauge de contrainte, les thermocouples et les dispositifs de température à résistance (RTD)
- mikroBUS : interface SPI
Le ADC 13 Click Board ™ est une carte complémentaire compacte qui contient un convertisseur de données hautes performances. Cette carte comprend l'ADS1262, un convertisseur analogique-numérique 32 bits, haute précision, 38 kSPS, avec amplificateur de gain programmable et référence de tension de Texas Instruments. Ce convertisseur analogique-numérique se compose d'un PGA CMOS à faible bruit (gains de 1 à 32), d'un modulateur ΔΣ, suivi d'un filtre numérique programmable. Le frontal analogique flexible (AFE) intègre deux sources de courant d'excitation de capteur adaptées à la mesure directe de RTD. Un filtre numérique à stabilisation à cycle unique maximise le débit de conversion d'entrées multiples tout en offrant un rejet de 130 dB des interférences de cycle de ligne de 50 Hz et 60 Hz.
L' ADC 13 Click Board™ offre des solutions complètes et de haute précision pour les applications de capteurs les plus exigeantes, notamment les balances, les capteurs à jauge de contrainte, les thermocouples et les dispositifs de température à résistance (RTD).
How Does The ADC 13 Click Board™ Work?
The ADC 13 Click Board™ as its foundation uses the ADS1262, a low noise, low-drift, 38.4kSPS, delta-sigma (ΔΣ) ADC with an integrated PGA, reference, and internal fault monitors from Texas Instruments. This 32-bit ADC provides output data rates from 2.5 to 38400SPS for flexibility in resolution and data rates over various applications. The ADC's low noise and low drift architecture make these devices suitable for the precise digitization of low-level transducers, such as load cell bridges and temperature sensors.
Following the input multiplexer, ADS1262 features a high-impedance CMOS, a programmable gain amplifier, which provides a low voltage and current noise, enabling direct connection to low-level transducers. The PGA gain is programmable from 1 to 32V/V in binary steps, can be bypassed to allow the input range to extend below ground, and has voltage over-range monitors to improve the integrity of the conversion result.
The ADS1262 communicates with MCU using the standard SPI serial interface with a maximum frequency of 8MHz to read the conversion data, configure and control the ADC. ADC conversions, which can be programmed to a free-run mode or perform one-shot conversions, are started by a control STR pin, routed to the PWM pin of the mikroBUS™ socket, or by commands. An additional ready signal, routed on the INT pin of the mikroBUS™ socket labeled as DTR, is added, indicating that new data is ready for the host. Alongside this pin, this Click board™ has a Reset feature routed to the RST pin on the mikroBUS™ socket, which with a low logic level puts the module into a Reset state, and with a high level operates module normally.
In addition to the ADS1262 present on the ADC 13, this Click board™ also has two 2x3 male headers. Eleven analog inputs located on these headers are configurable as either ten single-ended inputs, five differential inputs, or any combination. Many of the analog inputs are multifunction as programmed by the user.
The ADC 13 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the SPI communication lines properly. 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
| Type | ADC |
| Applications | Can be used for the most demanding sensor applications, including weighing scales, strain-gauge sensors, thermocouples, and resistance temperature devices (RTD) |
| On-board modules | ADS1262 - low noise, low-drift, 38.4kSPS, delta-sigma (ΔΣ) ADC with an integrated PGA, reference, and internal fault monitors from Texas Instruments |
| Key Features | Low power consumption, low noise and drift, integrated PGA, internal fault monitors, 11 multifunction analog inputs, high accuracy, and more |
| Interface | SPI |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
Pinout Diagram
This table shows how the pinout on ADC 13 Click Board™ 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 | STR | Start Conversion | |
| Reset | RST | 2 | RST | INT | 15 | DTR | Data Ready Indicator |
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | NC | |
| SPI Data IN | 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 |
Onboard settings and indicators
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| J1-J2 | - | Populated | Analog Input Channels Header |
ADC 13 Click electrical specifications
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Analog Input Supply Voltage | 4.75 | 5 | 5.25 | V |
| Resolution | 32 | - | - | bits |
| Data Rate | 2.5 | - | 38400 | SPS |
| Operating Temperature Range | -40 | +25 | +125 | °C |
Software Support
We provide a library for the ADC 13 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The 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 13 Click driver.
Key Functions
adc13_cfg_setup- Config Object Initialization function.adc13_init- Initialization function.adc13_default_cfg- Click Default Configuration function.
Example Description
This example demonstrates the use of ADC 13 Click board.
The demo application is composed of two sections :
void application_task ( void )
{
float voltage = 0;
float temperature = 0;
adc13_measure_voltage ( &adc13, ADC13_VREF_INTERNAL, &voltage );
log_printf( &logger, " Voltage: %.3f Vrn", voltage );
adc13_measure_temperature ( &adc13, &temperature );
log_printf( &logger, " Temperature: %.2f Crn", temperature );
log_printf( &logger, " ---------------------------rn" );
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.ADC13
Additional Notes and Information
Depending on the development board you are using, you may need a 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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.
mikroSDK
The ADC 13 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.
Carte à clic ADC 13
Frequently Asked Questions
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