HMC894LP5E

Overview

The HMC894LP5E is a monolithic microwave integrated circuit (MMIC) tunable bandpass filter designed for surface-mount technology. It operates within a frequency range of 5.9 to 11.2 GHz, with the center frequency adjusted via an analog control voltage between 0 and 14 V. The device features a typical 3 dB bandwidth of approximately 6% and a 20 dB bandwidth of roughly 16.5%. Key electrical specifications include a maximum insertion loss of 9 dB, a return loss of 7.5 dB at the 2 dB bandwidth, and a re-entry frequency exceeding 25 GHz. It supports fast tuning responses of 200 ns and maintains linear operation up to +10 dBm input power.

Feature Summary

• Provides a dynamically adjustable solution for advanced communications applications through user-selectable passband frequencies.
• Offers excellent wideband rejection characteristics exceeding 30 dB across the operational spectrum.
• Delivers fast tuning response times suitable for rapid frequency switching requirements.
• Serves as a single-chip replacement for mechanically tuned designs, reducing physical footprint.

Applications

• Test & Measurement Equipment
• Military RADAR & EW/ECM Systems
• SATCOM & Space Communications

Procurement Notes

Verify component status before integration, as documentation indicates this part may be obsolete or discontinued. Confirm availability through authorized Analog Devices distributors or legacy stock channels. Ensure that any procurement includes proper handling precautions due to electrostatic sensitivity. Validate that the specific lot number meets current quality standards if sourcing from secondary markets.

Selection Notes

Select this component when a compact, electronically tunable bandpass filter is required in the 6 to 11 GHz range. Consider the 9 dB insertion loss and 7.5 dB return loss limits against system link budget requirements. Evaluate the need for external low-noise driver circuits to optimize residual phase noise performance. Ensure the application can accommodate the 0 to 14 V control voltage range for both center frequency and bandwidth adjustment.

Part Context

The HMC894LP5E belongs to the Hittite Microwave Corporation MMIC filter family, now managed by Analog Devices. It is part of a series of tunable bandpass filters designed to replace bulky switched filter banks. This specific model targets mid-band microwave applications requiring electronic agility without mechanical components.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet. As the component is marked obsolete, engineers should consult Analog Devices for current equivalent products or evaluate alternative MMIC tunable filters from other manufacturers that meet the 5.9-11.2 GHz specification.

FAQ

How is the center frequency of the HMC894LP5E controlled?

The center frequency is varied between 5.9 and 11.2 GHz by applying an analog tune voltage (Vfctl) between 0 and 14 V to pin 12.

What is the maximum input power for linear operation?

The maximum input power for linear operation is specified as +10 dBm.

Does the HMC894LP5E require external DC coupling capacitors?

No, the RFIN (pin 6) and RFOUT (pin 19) pins are DC coupled and matched to 50 Ohms; external voltages must not be applied to these pins.