The AD7726KN is a complete isolated analog-to-digital converter (ADC) manufactured by Analog Devices (ADI). This ADC integrates an isolation barrier, making it ideal for applications where galvanic isolation is required to protect sensitive circuitry or personnel from high voltages or ground loops.

Applications

• Industrial Automation: Used in industrial automation systems for isolated data acquisition from sensors and transducers.
• Motor Control: Employed in motor control applications for isolated current and voltage sensing.
• Power Monitoring: Integrated into power monitoring systems for isolated measurement of voltage and current.
• Medical Equipment: Used in medical equipment where patient safety requires galvanic isolation.
• High-Voltage Measurement: Suitable for high-voltage measurement applications requiring isolation.

Features

• Isolated ADC: Provides galvanic isolation between the analog input and the digital output.
• Sigma-Delta Architecture: Uses a sigma-delta architecture for high resolution and accuracy.
• On-Chip Oscillator: Includes an on-chip oscillator, eliminating the need for an external clock source.
• SPI Interface: Communicates using a Serial Peripheral Interface (SPI).
• Single Supply Operation: Operates from a single supply voltage.

Benefits

• Safety and Protection: Galvanic isolation protects sensitive circuitry and personnel from high voltages and ground loops.
• High Accuracy: Sigma-delta architecture provides high resolution and accuracy.
• Simplified Design: On-chip oscillator simplifies the design by eliminating the need for an external clock.
• Easy Interface: SPI interface simplifies communication with microcontrollers and other digital systems.
• Versatile Applications: Suitable for a wide range of applications requiring isolation.

Additional Details

The AD7726KN includes an integrated isolation barrier that provides a high level of voltage isolation. The sigma-delta architecture offers excellent linearity and noise performance. The device requires a stable reference voltage for accurate operation. The SPI interface allows for easy configuration and data retrieval. The AD7726KN is designed to operate over a specified temperature range, and proper thermal management may be required for optimal performance. The device is often used in applications where safety and reliability are critical, such as industrial control systems and medical equipment. It is important to consult the datasheet for detailed specifications, including isolation voltage, input voltage ranges, output data formats, and timing characteristics. The integrated oscillator is trimmed for accurate operation over temperature and voltage variations. The device is available in a surface-mount package, simplifying assembly and integration into circuit boards.