Mikroelektronika d.o.o.
Carte à clic ADC 19
Carte à clic ADC 19
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Key Features:
- Faible consommation d'énergie, spécifiée sur une plage de fréquences d'échantillonnage, deux canaux d'entrée, interface série haute vitesse, hautes performances, etc.
- Basé sur l'ADC122S101 - convertisseur analogique-numérique CMOS 12 bits à deux canaux de Texas Instruments
- Peut être utilisé pour les applications les plus exigeantes, des applications d'acquisition de données à distance à usage général aux appareils électroniques grand public portables et plus encore
- mikroBUS : interface SPI
La carte Click Board™ ADC 19 est une carte complémentaire compacte qui contient un convertisseur de données hautes performances. Cette carte comprend l'ADC122S101, un convertisseur analogique-numérique CMOS 12 bits à deux canaux à faible consommation de Texas Instruments. Ce convertisseur analogique-numérique (CAN) configurable SPI est entièrement spécifié sur une plage de fréquence d'échantillonnage de 500 ksps à 1 Msps, offrant une fiabilité et des performances élevées. Le convertisseur est basé sur une architecture de registre à approximations successives avec un circuit de suivi et de maintien interne configurable pour accepter un ou deux signaux d'entrée sur ses canaux d'entrée. Cette carte Click™ offre une solution de haute précision pour les applications les plus exigeantes, des applications d'acquisition de données à distance à usage général aux appareils électroniques grand public portables et plus encore.
La carte Click Board™ ADC 19 est prise en charge par une bibliothèque compatible mikroSDK, qui comprend des fonctions qui simplifient le développement logiciel. Cette carte Click Board™ est un produit entièrement testé, prêt à être utilisé sur un système équipé du socket mikroBUS™.
How Does The ADC 19 Click Board™ Work?
The ADC 19 Click Board™ as its foundation uses the ADC122S101, a high-performance two-channel CMOS analog-to-digital converter (ADC) from Texas Instruments. The ADC122S101 comes with an integrated 12-bit SAR-ADC, input multiplexer, and control logic block, allowing ADC to communicate with MCU through a high-speed serial interface. Unlike the conventional practice of specifying performance at a single sample rate only, this ADC is fully specified over a sample rate range of 500ksps to 1Msps. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit configurable to accept one or two input signals at its input channels.
The ADC 19 Click Board™ communicates with MCU through a standard SPI interface and operates at clock rates up to 16MHz, providing data in digital format of 12-bits. The output serial data is straight binary and is compatible with several standards, such as SPI, QSPI, MICROWIRE, and many standard DSP serial interfaces.
The ADC 19 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 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 | The ADC 19 Click Board™ can be used for the most demanding applications, from general-purpose remote data acquisition applications to portable consumer electronics and more |
| On-board modules | ADC122S101 - two-channel CMOS 12-bit analog-to-digital converter from Texas Instruments |
| Key Features | Low power consumption, specified over a range of sample rates, two input channels, high-speed serial interface, high performance, and more |
| Interface | SPI |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the ADC 19 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 | NC | ||
| NC | 2 | RST | INT | 15 | NC | ||
| 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 |
ADC 19 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Analog Input Voltage | 0 | - | 5 | V |
| Resolution | - | 12 | - | bits |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Software Support
We provide a library for the ADC 19 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 The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the ADC 19 Click Board™ driver.
Key functions
-
adc19_set_vrefThis function sets the voltage reference value that will be used for voltage calculation. -
adc19_set_input_channelThis function sets the selected input channel active by modifying the control register. -
adc19_get_voltageThis function reads the voltage from the previously selected channel by using SPI serial interface.
Example Description
This example demonstrates the use of the ADC 19 Click Board™ by reading the voltage from the two analog input channels.
void application_task ( void )
{
float voltage;
if ( ADC19_OK == adc19_set_input_channel ( &adc19, ADC19_INPUT_CHANNEL_1 ) )
{
if ( ADC19_OK == adc19_get_voltage ( &adc19, &voltage ) )
{
log_printf ( &logger, " IN1 : %.3f V rn", voltage );
}
}
if ( ADC19_OK == adc19_set_input_channel ( &adc19, ADC19_INPUT_CHANNEL_2 ) )
{
if ( ADC19_OK == adc19_get_voltage ( &adc19, &voltage ) )
{
log_printf ( &logger, " IN2 : %.3f V rnn", voltage );
}
}
Delay_ms ( 500 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The 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.ADC19
Additional Notes and Information
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
The ADC 19 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 19
Frequently Asked Questions
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