AD7403BRIZ: Isolated Sigma-Delta Modulator from Analog Devices Inc.

The AD7403BRIZ is a high-performance, second-order sigma-delta modulator that converts an analog input signal into a high-speed, single-bit data stream, with on-chip isolation provided by Analog Devices Inc.'s iCoupler technology. This product is designed for precision, high-voltage signal acquisition and offers a robust solution for a wide range of industrial and instrumentation applications, including motor control, power quality monitoring, and medical equipment.

Key Features

• Isolation: The integrated iCoupler technology ensures that the analog input and the digital output are isolated from each other, providing safety and protection against high common-mode voltages up to 5 kV RMS.
• High Precision: With its sigma-delta architecture, the AD7403BRIZ delivers precise measurement of the input signal with a dynamic range of -3 dB, ensuring accurate data conversion even in noisy environments.
• Wide Bandwidth: The modulator supports a wide signal bandwidth up to 250 kHz, allowing it to be used in applications requiring high-speed data acquisition.
• Serial Interface: The single-bit data stream output can be easily interfaced with digital signal processors (DSPs) or microcontrollers, simplifying the design of digital isolation systems.
• Robust Design: The device operates over a wide temperature range from -40°C to +125°C, making it suitable for harsh industrial environments.
• Compact Package: Housed in a compact, 16-lead SOIC package, the AD7403BRIZ minimizes board space and is ideal for space-constrained applications.

Applications

The AD7403BRIZ is versatile and can be used in various applications that require accurate and isolated analog-to-digital conversion. Some typical applications include:

• Isolated voltage and current sensing in motor drives
• Power supply control and monitoring
• Renewable energy systems
• Industrial process controls
• Medical instrumentation requiring electrical isolation

With its combination of isolation, precision, and high-speed operation, the AD7403BRIZ from Analog Devices Inc. is an excellent choice for designers looking to integrate isolated analog input capabilities into their systems with minimal design complexity and maximum reliability.