Analog Devices Inc. 106137-HMC445LP4

Overview

106137-HMC445LP4 from Analog Devices (formerly Hittite Microwave) is a GaAs HBT MMIC active x16 frequency multiplier in a 4×4 mm leadless SMT package, delivering +7 dBm output power at 9.9–11.0 GHz with >25 dBc sub-harmonic suppression and −130 dBc/Hz SSB phase noise at 100 kHz offset, designed for LO multiplier chains in X-band radar and point-to-point radio systems.

For engineers reviewing the 106137-HMC445LP4 datasheet, 106137-HMC445LP4 pinout, 106137-HMC445LP4 application, or 106137-HMC445LP4 equivalent, key selection criteria include input frequency range (618.75–687.50 MHz), single 5V supply operation, RF input/output return loss performance, thermal resistance (87.2 °C/W), and MSL1 reflow compatibility.

Technical Context

This device implements an InGaP GaAs HBT-based active multiplication architecture with fixed x16 ratio, operating across 618.75–687.50 MHz input to produce 9.9–11.0 GHz output. It requires no external biasing circuitry beyond a 5V ±0.5V supply and features DC-blocked RF input and AC-coupled RF output.

Its design emphasizes stability over temperature (−40 to +85 °C) and supply voltage (4.5–5.5 V), with minimal output power variation (<1 dB) and robust RF port matching-input return loss ≥28 dB and output return loss ≥7 dB typical at +25 °C.

Key Specifications

Pinout & Package

24-lead 4×4 mm leadless surface-mount package (16 mm² footprint) with exposed ground paddle; RoHS-compliant Sn/Pb finish (MSL1, peak reflow 235 °C); all ground leads and paddle must be soldered to PCB RF/DC ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar active frequency multiplier applications.

Compared with HMC445LP4E and HMC1099LP4E, the 106137-HMC445LP4 offers optimal balance of output power (+7 dBm), phase noise (−130 dBc/Hz), and proven reliability in military radar deployments-making it preferred where maximum signal fidelity and thermal stability are critical.

Availability

106137-HMC445LP4 is available at Aetrix Electronics and suitable for X-band radar transceivers, point-to-point microwave radios, fiber optic RF-over-fiber links, satellite communication uplinks, and military electronic warfare systems requiring stable component supply and long-term obsolescence management.

Supply support for 106137-HMC445LP4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices acquired Hittite Microwave in 2014 and integrates its high-frequency RF/Microwave portfolio into precision signal processing solutions for defense, communications, and instrumentation markets.

The HMC445LP4 belongs to Hittite's SMT GaAs HBT MMIC active multiplier product line, engineered specifically for compact, high-performance LO generation in X-band radar and wireless infrastructure where phase noise, power stability, and thermal robustness are paramount.

FAQ

What is the input frequency range supported by the 106137-HMC445LP4?

The 106137-HMC445LP4 supports an input frequency range of 618.75–687.50 MHz, optimized for direct drive from integer-N or fractional-N synthesizers generating stable reference tones for X-band LO chains. This narrow band ensures maximum conversion efficiency and harmonic suppression within the specified 9.9–11.0 GHz output window.

Does the 106137-HMC445LP4 require external DC blocking on the RF input?

Yes-the 106137-HMC445LP4 requires external DC blocking on the RFIN (Pin 3) only if the driving source applies a DC voltage; the device itself has no internal DC path at the RF input. Evaluation board design uses AC coupling, and RF input return loss remains ≥28 dB across temperature when properly terminated.

What is the thermal resistance and maximum junction temperature for the 106137-HMC445LP4?

The 106137-HMC445LP4 has a thermal resistance (R_th) of 87.2 °C/W from junction to ground paddle. Its absolute maximum channel temperature is 135 °C, with continuous power dissipation derated above 85 °C at 11.5 mW/°C. At 78 mA and 5V, power dissipation is ~390 mW, allowing safe operation with adequate PCB copper area.

Can the 106137-HMC445LP4 operate from a supply voltage other than 5V?

Yes-the 106137-HMC445LP4 operates across 4.5–5.5 V with stable output power and phase noise performance. Supply current varies from 75 mA at 4.5 V to 80 mA at 5.5 V, and output power changes by less than 0.5 dB across this range, making it tolerant to nominal rail variations in regulated power supplies.

Is the 106137-HMC445LP4 pin-compatible with the HMC445LP4E variant?

Yes-the 106137-HMC445LP4 and HMC445LP4E share identical pinout, package dimensions, and RF performance; the only differences are lead finish (Sn/Pb vs. 100% matte Sn) and MSL rating (235 °C vs. 260 °C peak reflow). No PCB layout change is required when substituting between these variants.