AD7401YRWZ Isolated Sigma-Delta Modulator

The AD7401YRWZ from Analog Devices Inc. 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 digital isolation based on Analog Devices' iCoupler® technology. This product is designed for precision signal acquisition and control systems, offering a significant advantage in terms of noise performance, robustness against harsh environments, and isolation capabilities.

With its 16-lead SOIC wide-body package, the AD7401YRWZ ensures ample creepage and clearance distances to maintain electrical isolation between the input and output sides. This feature makes it an ideal choice for applications requiring stringent safety standards, such as industrial process controls, motor drives, and medical equipment monitoring.

The modulator operates from a 5 V power supply and accepts a differential input voltage range of ±250 mV (G = 1). It boasts an impressive signal-to-noise ratio (SNR) and provides a serial interface that outputs the single-bit data stream at a rate of up to 20 MHz. This high data rate allows for oversampling, which can be used to improve the SNR and to simplify the digital filtering and decimation stages.

Key features of the AD7401YRWZ include:

• Integrated isolation barrier for safety and noise immunity
• High common-mode transient immunity: >25 kV/µs
• Wide operating temperature range: -40°C to +125°C
• Up to 5.7 kV RMS isolation rating
• Low power consumption
• Robust against high-frequency interference
• Enhanced system performance through better signal acquisition

Developers can take advantage of the AD7401YRWZ's isolated nature to protect sensitive circuits from high common-mode voltages and to break ground loops, thereby improving measurement accuracy and system safety. The product's reliability and performance are further underlined by Analog Devices' reputation for delivering high-quality components that meet the demanding needs of industrial and medical applications.

Whether implementing inverter control feedback mechanisms or capturing sensitive biomedical signals, the AD7401YRWZ provides a compact, efficient, and reliable solution for your data acquisition needs.