HCPL-7851#300

Instrumentation, Op Amps, Buffer Amps Overview

The HCPL-7851#300 is a Class H hermetically sealed analog isolation amplifier manufactured by Broadcom Limited. It integrates a Sigma-Delta modulator and an optical link to provide high-speed signal isolation with a bandwidth of 100 kHz. The device features a gain of 8 V/V, an input dynamic range of ±200 mV, and an output voltage swing of 0 to 5 V. Key electrical specifications include an insulation voltage of 1500 Vdc, a common-mode rejection ratio of 69 dB, and an input offset voltage of 600 µV. It operates on a single 5 V supply (4.5 V to 5.5 V) within a temperature range of -55°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• High reliability construction utilizing a hermetically sealed ceramic DIP package compliant with MIL-PRF-38534 Class H standards.
• Superior noise immunity achieved through Sigma-Delta modulation and optical coupling, providing 8 kV/µs common-mode transient rejection.
• Precision signal processing capabilities ensuring low nonlinearity and stable gain across the full military-grade operating temperature range.

Instrumentation, Op Amps, Buffer Amps Applications

• Current monitoring in motor controllers and variable frequency drives
• Signal isolation for IGBT gate drive circuits
• High-reliability systems in military, aerospace, and medical equipment

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify that the specific suffix #300 corresponds to the required pin configuration and packaging variant. Confirm compliance with MIL-PRF-38534 Class H requirements if applicable. Ensure the supplier provides valid traceability documentation for this high-reliability component class.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high common-mode transient immunity and precise analog isolation are required in noisy environments. The 100 kHz bandwidth supports fast-switching applications like IGBT control. Verify that the ±200 mV input range matches the shunt resistor or sensor output voltage.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the HCPL-785x series of high-performance hermetic analog isolation amplifiers. These devices are designed for demanding industrial and defense applications where standard plastic-packaged isolators may fail due to environmental stress or high dv/dt noise.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

HCPL-7850: Functionally similar Class H isolation amplifier; verify specific suffix compatibility and exact parameter tolerances before substitution.