NSI1311-Q1SWVR

Overview

The NSI1311-Q1SWVR is a high-performance isolated amplifier manufactured by Novosense, designed for automotive applications. It features a single-ended input signal range of 0.02V to 2V with a fixed gain of 1. The device provides differential output and operates within a temperature range of -40°C to +125°C. Key electrical specifications include an input offset voltage (Vos) of 400μV, input bias current of 3.5nA, and a -3dB bandwidth of 400kHz. It offers a common-mode transient immunity (CMTI) of 150kV/μs and supports an isolation voltage of 5kV. The component is housed in an SOP-8 package.

Feature Summary

• Utilizes capacitive isolation technology to provide electrical separation between input and output circuits.
• Delivers high common-mode transient immunity to effectively suppress interference in noisy environments.
• Ensures precise signal conditioning through low gain error and minimal nonlinear distortion characteristics.

Applications

• Voltage detection in automotive electric drive systems
• Bus voltage sampling in motor drivers
• Data acquisition systems requiring galvanic isolation

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status before procurement. Confirm the 'S' indicates the standard SOP-8 package variant. Ensure compatibility with system requirements for 400kHz bandwidth and 5kV isolation rating. Validate that the manufacturer's datasheet aligns with the intended application's thermal and electrical constraints.

Selection Notes

Select this component when designing automotive powertrain systems requiring precise voltage monitoring under high electromagnetic interference. The fixed unity gain simplifies circuit design for bus voltage sensing. Consider the 400kHz bandwidth sufficient for typical motor control frequencies. The wide operating temperature range ensures reliability in harsh engine bay environments.

Part Context

This part belongs to the NSI1311 series of isolated amplifiers from Novosense. It is specifically engineered for automotive-grade applications, distinguishing it from industrial variants like the NSI1311-DSWVR by its compliance with automotive reliability standards. The series leverages proprietary capacitive isolation technology to replace traditional magnetic isolation solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult Novosense directly or authorized distributors for qualified alternatives that meet identical AEC-Q100 and performance specifications.