Analog Devices Inc. 107712-HMC369LP3

Overview

HMC369LP3 from Analog Devices (formerly Hittite Microwave) is a GaAs HBT MMIC active x2 frequency multiplier designed for LO generation in X-band RF systems. It delivers +4 dBm typical output power across 9.9–12.7 GHz output range, with 30 dBc sub-harmonic suppression and -142 dBc/Hz SSB phase noise at 100 kHz offset, operating from a single +5 V supply drawing 46 mA. It is used in OC-192 clock recovery, microwave radios, radar, and test instrumentation.

For engineers reviewing the HMC369LP3 datasheet, HMC369LP3 pinout, HMC369LP3 application, or HMC369LP3 equivalent, key selection criteria include its fixed x2 multiplication ratio, 3×3 mm QFN package, input frequency range of 4.95–6.35 GHz, stable output power vs. temperature/supply, and suitability for low-phase-noise LO chains requiring minimal external components.

Technical Context

The HMC369LP3 implements a monolithic GaAs HBT-based active doubler architecture with integrated biasing and on-chip matching networks. Its input accepts -5 to +5 dBm drive across 4.95–6.35 GHz, delivering amplified and multiplied output with minimal dependence on input level, supply voltage (4.5–5.5 V), or temperature (-40 to +85 °C).

It features DC-coupled RF input (RFIN) requiring external DC blocking only if biased externally, AC-coupled RF output (RFOUT), and a dedicated Vcc pin (Pin 14). All ground pins (4, 9) and exposed paddle must be soldered to PCB RF ground per Hittite's land pattern guidelines.

Key Specifications

Pinout & Package

16-lead 3×3 mm leadless QFN package with exposed thermal paddle; RoHS-compliant version HMC369LP3E uses matte Sn finish (MSL1, 260 °C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC187MS8G and QPL9057, the HMC369LP3 offers superior phase noise and tighter sub-harmonic suppression in a compact 3×3 mm footprint-making it the preferred choice for X-band LO chains where spectral purity and board area are critical constraints.

Availability

HMC369LP3 is available at Aetrix Electronics and suitable for OC-192 clock recovery, microwave radio transceivers, and military radar subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HMC369LP3 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 continues to manufacture and support its high-frequency RF portfolio, including GaAs and GaN MMICs for defense, communications, and instrumentation markets.

The HMC369LP3 belongs to Hittite's legacy active multiplier product line, engineered specifically for high-performance X-band LO synthesis where low phase noise, high suppression, and thermal stability are mandatory.

FAQ

What is the input frequency range supported by the HMC369LP3?

The HMC369LP3 supports an input frequency range of 4.95–6.35 GHz, divided into two sub-bands: 4.95–5.3 GHz and 5.3–6.35 GHz. This range enables compatibility with common L-band and lower X-band sources, such as crystal oscillators followed by buffer amplifiers or synthesizers. The HMC369LP3 is optimized for stable doubling performance across this span, with minimal variation in output power and phase noise.

Does the HMC369LP3 require external DC blocking on the RF input?

The HMC369LP3 RFIN (Pin 3) is DC-coupled, so external DC blocking is required only if an external DC voltage is applied to the input port. In standard operation with AC-coupled signal sources, no blocking capacitor is needed. However, grounding all NC pins and ensuring proper RF grounding of Pins 4 and 9 remains essential for repeatable performance and thermal stability of the HMC369LP3.

What is the maximum allowable supply voltage for the HMC369LP3?

The absolute maximum supply voltage for the HMC369LP3 is +5.5 V, with recommended operation at +5 V ±0.5 V. Supply current increases only marginally-from 46 mA at 5.0 V to 47 mA at 5.5 V-so overvoltage poses risk of permanent damage without significant functional benefit. Operating outside the specified range may degrade phase noise, output power flatness, or long-term reliability of the HMC369LP3.

How does the HMC369LP3 compare to the HMC369LP3E variant?

The HMC369LP3E is the RoHS-compliant version of the HMC369LP3, featuring 100% matte tin lead finish and MSL1 rating with 260 °C peak reflow tolerance. Electrically and functionally identical, both share the same pinout, performance specs, and thermal characteristics. The HMC369LP3 uses Sn/Pb solder finish and has a 235 °C reflow ceiling. Designers selecting between them must align with assembly process requirements-not electrical behavior-of the HMC369LP3 or HMC369LP3E.

Can the HMC369LP3 be used in pulsed RF applications?

The HMC369LP3 is characterized for continuous-wave operation and does not specify pulse response, rise/fall time, or duty-cycle limits in its datasheet. While its GaAs HBT process supports fast switching, absence of published pulsed-RF data means designers must validate transient behavior-including turn-on delay, overshoot, and settling time-empirically. For known pulsed applications, the HMC369LP3 should be treated as a CW-optimized device unless supplemental characterization confirms suitability.