Mikroelektronika d.o.o.
Carte à clic ADC 20
Carte à clic ADC 20
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Key Features:
- Huit canaux configurables par l'utilisateur, sorties numériques push-pull à drain ouvert, larges plages de fonctionnement, interface série SPI, haute vitesse, hautes performances, haute résolution, filtres de moyenne programmables, et plus encore
- Basé sur le TLA2518 - convertisseur analogique-numérique (ADC) de Texas Instruments
- Peut être utilisé pour l'acquisition de données à distance à usage général ou pour des applications industrielles
- mikroBUS : interface SPI
La carte ADC 20 Click Board™ : la conversion de données hautes performances simplifiée
Présentation de l'ADC 20 Click Board™, la carte complémentaire compacte dotée de capacités de conversion de données exceptionnelles. Avec ses fonctionnalités hautes performances et sa conception fiable, cette carte est parfaite pour diverses applications.
Caractéristiques principales :
- TLA2518 : Le cœur de l'ADC 20 Click Board™ est le TLA2518, un convertisseur analogique-numérique à registre d'approximation successive (SAR ADC) à huit canaux et 12 bits configurable par SPI de Texas Instruments. Ses fonctionnalités avancées garantissent une conversion de données précise et exacte.
- Oscillateur interne : le TLA2518 comprend un oscillateur interne, simplifiant le processus de conversion ADC et réduisant le besoin de composants supplémentaires.
- Moyenne et réduction du bruit : grâce à des filtres de moyenne programmables, l'ADC 20 Click Board™ permet de minimiser le bruit des entrées analogiques, offrant ainsi des données de haute qualité. Il vous permet également de faire la moyenne de plusieurs échantillons de données avec un seul démarrage de conversion, optimisant ainsi l'efficacité.
- Configuration flexible des canaux : les huit canaux de l'ADC 20 Click Board™ peuvent être utilisés comme entrées analogiques. De plus, quatre canaux peuvent également servir d'entrées ou de sorties numériques, offrant ainsi une polyvalence accrue.
Applications :
L'ADC 20 Click Board™ offre une précision exceptionnelle, ce qui la rend idéale pour diverses applications :
- Acquisition de données à distance à usage général : capturez et convertissez avec précision les données provenant de sources distantes, garantissant des résultats fiables.
- Applications industrielles : De la surveillance industrielle au contrôle des processus, l'ADC 20 Click Board™ est conçu pour répondre aux exigences des environnements industriels difficiles.
Bibliothèque compatible mikroSDK et intégration transparente :
Pour rationaliser votre processus de développement logiciel, l'ADC 20 Click Board™ est pris en charge par une bibliothèque compatible mikroSDK. Cette bibliothèque fournit des fonctions faciles à utiliser qui simplifient l'intégration avec votre microcontrôleur hôte, réduisant ainsi le temps et les efforts de développement.
Découvrez la puissance de l'ADC 20 Click Board™ - une solution entièrement testée et prête à l'emploi conçue pour une intégration transparente avec tout système équipé de la prise mikroBUS™.
How Does The ADC 20 Click Board™ Work?
The ADC 20 Click Board™ is based on the TLA2518, a small, eight-channel, multiplexed, 12-bit, 1-MSPS, analogue-to-digital converter (ADC) from Texas Instruments. The TLA2518 has an internal oscillator for the ADC conversion process and supports averaging multiple data samples with a single conversion start. Also, the built-in programmable averaging filters, which output a 16-bit result for enhanced resolution, help reduce noise from the analogue inputs and the number of data samples required to be read by the host MCU. The analogue input channel selection can be auto-sequenced to simplify the digital interface with the host MCU.
This Click board™ communicates with MCU through a standard SPI interface, supporting all four SPI-compatible protocols (SPI Mode 0, 1, 2, and 3) to access the device, and operates at clock rates up to 60MHz for all configurations and information management and acquiring conversion results. As mentioned, the TLA2518 powers up in Manual mode and can be configured into either of three operational modes by writing the configuration registers for the desired mode.
The Manual mode allows the host MCU to directly select the analogue input channel, while in the second, the On-the-Fly mode of operation, the analogue input channel is set using the first five bits on the SDI signal without waiting for the CS rising edge. This way, the ADC samples the newly selected channel on the CS edge, and there is no latency between the channel selection and the ADC output data. In the third Auto-Sequence mode, the internal channel sequencer switches the multiplexer to the next analogue input channel after every conversion.
In addition to the fact that all eight channels, also including channels on the side headers, can be used as analogue input pins, this board allows for some channels, in this case, channels CH0, CH1, CH6, and CH7 of the TLA2518 to be configured as digital inputs, open-drain digital outputs, and push-pull digital outputs.
This ADC 20 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 | It can be used for general-purpose remote data acquisition to industrial applications |
| On-board modules | TLA2518 - analogue-to-digital converter (ADC) from Texas Instruments |
| Key Features | Eight user-configurable channels, open-drain, push-pull digital outputs, wide operating ranges, SPI serial interface, high speed, high performance, high resolution, programmable averaging filters, 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 f the ADC 20 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 |
ADC 20 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Resolution | - | 12 | 16 | bits |
| Sampling Rate | - | - | 1000 | kSPS |
Software Support
We provide a library for the ADC 20 Click Board™ and a demo application (example), developed using MikroE compilers. The demo can run on all the main MikroE development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager(recommended), downloaded from our LibStock™ or found on the MikroE Github account.
Library Description
This library contains API for the ADC 20 Click Board™ driver.
Key functions
-
adc20_read_dataThis function reads two bytes of data by using SPI serial interface. -
adc20_set_gpo_valueThis function sets the gpo value for the selected channels. -
adc20_read_gpio_valueThis function reads the gpio pins value.
Example Description
This example demonstrates the use of the ADC 20 Click Board™ by displaying the state of 8 channels configured as analogue inputs (CH2-CH5), digital inputs (CH0-CH1) and digital outputs (CH6-CH7).
void application_task ( void )
{
adc20_start_auto_sequence ( &adc20 );
for ( uint8_t ch_id = ADC20_CHANNEL_ID_2; ch_id <= ADC20_CHANNEL_ID_5; ch_id++ )
{
uint16_t adc_data = 0;
if ( ADC20_OK == adc20_read_data ( &adc20, &adc_data ) )
{
float voltage = ( float ) ( adc_data >> ADC20_ADC_OFFSET ) / ADC20_RES_12BIT * ADC20_VREF_3V3;
log_printf ( &logger, " AIN%u: %.2f Vrn", ( adc_data & ADC20_CHANNEL_ID_MASK ), voltage );
}
}
adc20_stop_auto_sequence ( &adc20 );
static uint8_t out_logic_state = ADC20_GPIO_VALUE_LOW;
if ( ADC20_OK == adc20_set_gpo_value ( &adc20, ( ADC20_CHANNEL_6 | ADC20_CHANNEL_7 ), out_logic_state ) )
{
uint8_t gpio_value = 0;
if ( ADC20_OK == adc20_read_gpio_value ( &adc20, &gpio_value ) )
{
log_printf ( &logger, " GPIO state: 0x%.2Xrn", gpio_value );
}
}
out_logic_state = !out_logic_state;
log_printf ( &logger, "rn" );
Delay_ms ( 1000 );
}
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.ADC20
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, 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
The ADC 20 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.
Carte à clic ADC 20
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