VIA0250DD

Overview

The VIA0250DD is a high-performance differential output isolated amplifier based on proprietary capacitive isolation technology. It features a linear differential input voltage range of ±250 mV and a fixed gain of 8.2 V/V. The device provides an isolation test voltage of 5000 VRMS and operates within a temperature range of -40 °C to +125 °C. Key electrical characteristics include a typical common-mode transient immunity (CMTI) of 150 kV/μs, a bandwidth of 250 kHz, and a signal-to-noise ratio of 72 dB at a 100 kHz bandwidth.

Feature Summary

• Proprietary capacitive isolation technology with a 5000 VRMS isolation test voltage
• High common-mode transient immunity for accurate measurements in noisy environments
• Low offset drift and gain drift ensuring accuracy across the entire operating temperature range
• Integrated common-mode overvoltage detection and fail-safe output diagnostics

Applications

• Isolated current measurement in motor control applications
• Current sensing in power supplies and charging stations
• EV powertrain monitoring
• Battery management systems
• 48 V board net applications

Procurement Notes

Verify the specific package type SOP-8 (300 mil) and ensure compliance with required agency approvals such as UL, cUL, and DIN EN 60747-5-5. Confirm that the linear input range matches the application's shunt-based current sensing requirements. Validate thermal performance against the junction-to-ambient thermal resistance specifications during system integration.

Selection Notes

Select this component when high precision and robust isolation are required for shunt-based current sensing. The fixed gain of 8.2 V/V simplifies interface design with downstream analog-to-digital converters. Ensure the application environment stays within the specified operating temperature limits and that the input signals remain within the recommended linear full-scale range to maintain optimal linearity and noise performance.

Part Context

The VIA0250DD belongs to Vishay's VIA series of isolation amplifiers, which utilize capacitive isolation technology. This series is designed to deliver exceptional thermal stability and precise measurement capabilities for industrial, automotive, and medical applications. The device complements Vishay's WSBE low TCR, high power shunts to ensure superior performance across a wide temperature range.

Replacement Considerations

For direct replacements within the same family, consider the VIA0050DD or VIA2000SD. Verify that the alternative part number meets the specific linear input range and gain requirements of the existing circuit design before implementation.

FAQ

What is the function of the fail-safe output?

The fail-safe output provides a negative differential output voltage activated when the VDD1 undervoltage is detected or during common-mode overvoltage conditions, simplifying system-level fault detection.

How does the device handle common-mode transients?

The VIA0250DD offers a typical common-mode transient immunity (CMTI) of 150 kV/μs, allowing it to maintain accurate measurements even in electrically noisy environments.