Analog Devices Inc. 110227-HMC507LP5

Overview

HMC507LP5 from Analog Devices (formerly Hittite Microwave) is a GaAs InGaP HBT monolithic voltage-controlled oscillator with dual RF outputs: fundamental (Fo = 6.65–7.65 GHz) and half-frequency (Fo/2 = 3.325–3.825 GHz), delivering +13.5 dBm typical RFOUT power at +5 V supply, -115 dBc/Hz phase noise @ 100 kHz offset, and housed in a 32-lead 5×5 mm QFN package. It serves as a low-noise local oscillator in microwave radio transceivers.

For engineers reviewing the HMC507LP5 datasheet, HMC507LP5 pinout, HMC507LP5 application, or HMC507LP5 equivalent, key selection criteria include its integrated resonator architecture, Fo/Fo/2 dual-band capability, ±8 MHz pulling tolerance, 15 MHz/V pushing coefficient, and MSL3 reflow compatibility - all critical for VSAT and point-to-point radio design.

Technical Context

The HMC507LP5 implements a fully monolithic GaAs InGaP HBT oscillator core with on-die varactor tuning and integrated resonators, eliminating external LC tanks or matching networks. Its dual-output topology routes Fo to Pin 19 (RFOUT) and Fo/2 to Pin 12 (RFOUT/2), both AC-coupled and requiring no external DC blocking.

Frequency tuning is achieved via a 2–13 V analog control voltage applied to Pin 29 (VTUNE), with sensitivity averaging ~15 MHz/V across the band and <10 µA leakage at 13 V. The device operates over -40°C to +85°C with stable phase noise performance maintained by monolithic thermal coupling.

Key Specifications

Pinout & Package

Package: 32-lead leadless QFN, 5×5 mm body, exposed ground paddle, Sn/Pb finish, MSL3 rated (peak reflow 235°C). Requires full-solder connection of paddle and all GND pins to PCB RF ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar VCO applications.

Compared with HMC507LP5, HMC508LP5 offers extended upper band coverage with near-identical form and function, while ADF4355BCPZ trades monolithic simplicity and phase noise for programmability and integration - making it suitable for agile synthesizers but less optimal for static, low-jitter LO roles.

Availability

HMC507LP5 is available at Aetrix Electronics and suitable for VSAT radio development, point-to-point microwave links, and military SATCOM terminals requiring stable component supply, consistent RF performance, and long-term obsolescence management.

Supply support for HMC507LP5 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, integrating its high-frequency RF expertise into a broad portfolio of microwave, millimeter-wave, and RF solutions.

The HMC507LP5 belongs to Hittite's legacy MMIC VCO product line, engineered specifically for low-phase-noise, surface-mount LO generation in satellite communications and licensed microwave infrastructure.

FAQ

What is the operating temperature range for the HMC507LP5?

The HMC507LP5 operates over -40°C to +85°C ambient temperature. Its monolithic GaAs structure ensures stable frequency drift (≤0.9 MHz/°C) and consistent phase noise performance across this full industrial range, validated per datasheet electrical specifications at TA = +25°C and thermal characterization plots showing behavior at -40°C and +85°C.

Does the HMC507LP5 require external matching components?

No, the HMC507LP5 requires no external matching components. Its GaAs InGaP HBT MMIC design integrates resonators, negative resistance devices, and varactor diodes on-die. Both RFOUT and RFOUT/2 outputs are internally matched to 50 Ω and AC-coupled, needing only external DC blocking and 50 Ω termination per the evaluation board layout.

What is the recommended PCB grounding strategy for the HMC507LP5?

The HMC507LP5 requires robust RF grounding: the exposed metal paddle (Pin 5, 11, and paddle) must be soldered to a solid PCB ground plane using ≥6 thermal vias. All GND pins and the paddle form the primary RF return path; insufficient grounding degrades phase noise, output power, and pulling performance per Hittite Application Note land pattern guidance.

Can the HMC507LP5 be used as a standalone LO without a PLL?

Yes, the HMC507LP5 is designed for open-loop VCO operation. It delivers stable, low-phase-noise output with excellent temperature and supply push/pull immunity, making it suitable as a fixed or voltage-tuned LO in systems where frequency accuracy is managed externally (e.g., via calibration tables or coarse DAC control), without requiring closed-loop PLL stabilization.

What is the maximum allowable tuning voltage for the HMC507LP5?

The absolute maximum tuning voltage (VTUNE) for the HMC507LP5 is +15 V, though the functional range is specified as 2–13 V for full Fo coverage (6.65–7.65 GHz). Operating above 13 V yields diminishing frequency increase and risks exceeding recommended bias conditions; datasheet limits VTUNE leakage to 10 µA at 13 V.