AD7924BRU

Product Overview

Category

AD7924BRU belongs to the category of analog-to-digital converters (ADCs).

Use

The AD7924BRU is used to convert analog signals into digital data for various applications.

Characteristics

• High resolution: The AD7924BRU offers a resolution of 12 bits, ensuring accurate conversion of analog signals.
• Fast conversion rate: With a maximum conversion rate of 1 MSPS (Mega Samples Per Second), it provides real-time data acquisition.
• Low power consumption: The device operates at low power, making it suitable for battery-powered applications.
• Wide input voltage range: It can handle input voltages ranging from 0V to VREF, providing flexibility in signal acquisition.
• SPI interface: The ADC communicates with the microcontroller or other devices using the Serial Peripheral Interface (SPI) protocol.

Package and Quantity

The AD7924BRU comes in a small outline integrated circuit (SOIC) package. It is available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Resolution: 12 bits
• Conversion Rate: Up to 1 MSPS
• Input Voltage Range: 0V to VREF
• Power Supply: 2.7V to 5.25V
• Interface: SPI
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD7924BRU has a total of 16 pins. Here is the detailed pin configuration:

1. VDD: Power supply voltage
2. VREF: Reference voltage for ADC conversion
3. AGND: Analog ground
4. REFOUT: Buffered reference output
5. VIN: Analog input voltage
6. SCLK: Serial clock input for SPI communication
7. SDI: Serial data input for SPI communication
8. SDO: Serial data output for SPI communication
9. CS: Chip select input for SPI communication
10. DGND: Digital ground
11. DOUT/RDY: Data output or conversion ready indicator
12. CONVST: Conversion start control input
13. SDI/SDO: Serial data input/output for SPI communication
14. SCLK: Serial clock input for SPI communication
15. CS: Chip select input for SPI communication
16. VDD: Power supply voltage

Functional Features

• High-resolution ADC: The AD7924BRU provides accurate conversion of analog signals into 12-bit digital data.
• Fast conversion rate: With a maximum conversion rate of 1 MSPS, it enables real-time data acquisition.
• Low power consumption: The device operates at low power, making it suitable for battery-powered applications.
• Flexible input voltage range: It can handle input voltages from 0V to VREF, allowing for versatile signal acquisition.
• Easy integration: The ADC communicates with microcontrollers or other devices using the widely supported SPI interface.

Advantages and Disadvantages

Advantages

• High resolution ensures precise analog-to-digital conversion.
• Fast conversion rate allows for real-time data acquisition.
• Low power consumption extends battery life in portable applications.
• Wide input voltage range provides flexibility in signal acquisition.
• SPI interface enables easy integration with various microcontrollers and devices.

Disadvantages

• Limited to 12-bit resolution, which may not be sufficient for certain high-precision applications.
• Requires an external reference voltage (VREF) for accurate conversion.

Working Principles

The AD7924BRU works based on the successive approximation register (SAR) architecture. It samples the analog input voltage and converts it into a digital representation using a binary search algorithm. The internal SAR circuitry compares the input voltage with a reference voltage and iteratively determines the most significant bits (MSBs) of the digital output. The conversion process is controlled by the microcontroller through the SPI interface.

Detailed Application Field Plans

The AD7924BRU finds applications in various fields, including:

1. Industrial automation: It can be used for data acquisition in industrial control systems, monitoring sensors, and process control.
2. Medical devices: The ADC is suitable for medical instruments that require accurate measurement of physiological signals.
3. Test and measurement equipment: It can be integrated into oscilloscopes, multimeters, and other test equipment for signal analysis and measurement.
4. Communication systems: The ADC enables analog-to-digital conversion in wireless communication systems, base stations, and network analyzers.
5. Automotive electronics: It can be utilized in automotive applications such as engine control units, battery management systems, and sensor interfaces.

Detailed and Complete Alternative Models

• AD7920: 10-bit resolution ADC with similar features to the AD7924BRU.
• AD7928: 14-bit resolution ADC with higher precision than the AD7924BRU.
• AD791