TLP7820(B-LF4,E

Overview

The TLP7820(B-LF4,E) is an optically coupled isolation amplifier utilizing sigma-delta analog-to-digital converter technology. It features a gain rank B with ±0.5% accuracy, providing high-precision signal transmission across isolation barriers. The device operates on a single 5V supply and delivers an analog output. Key electrical specifications include a bandwidth of 230 kHz, a common-mode rejection ratio of 80 dB, and an input offset voltage of 900 µV. It supports a wide operating temperature range from -40°C to +105°C and offers a minimum isolation voltage of 5000 Vrms.

Feature Summary

• High gain accuracy of ±0.5% for precise measurement applications
• Sigma-delta A/D conversion technology ensures stable isolation performance
• Low power consumption design suitable for battery-operated systems
• Robust common-mode transient immunity for noisy environments

Applications

• Motor phase current sensing in electronic motor drives
• Power inverter current and voltage sensing
• Industrial automation control systems requiring isolated feedback

Procurement Notes

Verify the specific suffix (B-LF4,E) against official Toshiba documentation to confirm package type and compliance status. Ensure the ordering code matches the required gain rank and safety certifications. Cross-reference with authorized distributors to validate part authenticity and traceability before procurement.

Selection Notes

Select this component when high precision and low drift are critical for isolated signal conditioning. The sigma-delta architecture provides superior linearity compared to linear optocouplers. Consider the SO8L package dimensions for PCB layout constraints and verify thermal management requirements for the intended operating environment.

Part Context

This part belongs to the TLP7820 series of optically coupled isolation amplifiers designed for industrial and automotive applications. It integrates an infrared LED and a photodetector circuit with signal processing electronics on a single chip. The series is engineered to replace traditional transformer-based isolators in modern compact designs.

Replacement Considerations

Direct replacements within the same family include TLP7820(D4ALF4,E) or TLP7820(TP4,E). Verify that substitute parts match the required gain rank and package dimensions. Check for any differences in safety approvals or pinout configurations before implementation.