Analog Devices Inc. 117720-HMC647LP6

Overview

HMC647LP6 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC 6-bit digital phase shifter operating from 2.5 to 3.1 GHz, delivering 360° phase coverage with 5.625° LSB resolution, ≤1.0° RMS phase error, and ±0.4 dB insertion loss variation across all states - deployed in EW receivers, radar beamforming, and satellite communications systems.

For engineers reviewing the HMC647LP6 datasheet, HMC647LP6 pinout, HMC647LP6 application, or HMC647LP6 equivalent, key selection criteria include its 2.5–3.1 GHz bandwidth, 50 Ω internal matching, +5 V/−5 V dual-supply operation, 28-lead QFN package, and monotonic 6-bit control logic for precision RF phase adjustment in phased array subsystems.

Technical Context

The HMC647LP6 implements a monolithic GaAs MMIC architecture with six independent bit-controlled switched-path networks, enabling discrete phase states via positive 0/+5 V logic. Its design integrates on-chip 50 Ω terminations at RFIN and RFOUT, eliminating external matching components.

It operates with dual bias rails (Vdd = +5 V, Vss = −5 V), draws ≤5.3 mA per supply, and maintains phase accuracy over −40 °C to +85 °C. All 64 phase states are monotonic, with worst-case phase error bounded at +6/−15° and RMS error tightly controlled at 1.0°.

Key Specifications

Pinout & Package

Package: 28-lead QFN, 6 × 6 mm body, exposed thermal paddle, MSL1, Sn/Pb lead finish (HMC647LP6 variant). Internally matched to 50 Ω at both RF ports; no external DC blocking or matching required.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital phase shifter applications.

Compared with HMC647LP6, HMC646LP6 trades resolution and accuracy for simplicity and cost, while QM11036 extends bandwidth at the expense of phase fidelity and board-level integration effort - making HMC647LP6 optimal for precision S-band phased arrays where 1.0° RMS error and zero-external-component operation are mandatory.

Availability

HMC647LP6 is available at Aetrix Electronics and suitable for EW receivers, military radar systems, and satellite communications terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing for defense-critical programs.

Supply support for HMC647LP6 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 leads in high-performance RF, microwave, and millimeter-wave ICs for defense, aerospace, and communications.

The HMC647LP6 belongs to Analog Devices' legacy Hittite GaAs MMIC phase shifter product line, engineered specifically for high-accuracy, high-linearity beamforming in S-band radar and electronic warfare systems.

FAQ

What is the operating frequency range of the HMC647LP6?

The HMC647LP6 operates from 2.5 GHz to 3.1 GHz. Within this band, it delivers full 360° phase coverage with 5.625° least significant bit resolution and maintains ≤1.0° RMS phase error. Performance specifications including insertion loss variation (±0.4 dB) and return loss (>16 dB) are guaranteed across the entire 2.5–3.1 GHz range per the official datasheet.

Does the HMC647LP6 require external matching components?

No, the HMC647LP6 does not require external matching components. Both RFIN and RFOUT ports are internally matched to 50 Ω and DC-coupled, enabling direct integration into 50 Ω RF traces without external baluns, DC blocks, or impedance transformers. This feature is confirmed in the General Description and Pin Descriptions sections of the HMC647LP6 datasheet.

What supply voltages does the HMC647LP6 use?

The HMC647LP6 uses dual analog supplies: Vdd = +5 V and Vss = −5 V. Bias current is 5.3 mA per rail at +25 °C. Control inputs accept 0 V (low) and +5 V (high) logic levels with typical input current of 35 μA. These values are specified in the Absolute Maximum Ratings and Bias Voltage & Current tables of the HMC647LP6 datasheet.

Is the HMC647LP6 pin-compatible with the HMC647LP6E variant?

Yes, the HMC647LP6 and HMC647LP6E share identical pinout, package dimensions (6×6 mm QFN), and electrical functionality. The only differences are RoHS compliance (matte Sn finish vs. Sn/Pb) and peak reflow temperature rating (260 °C vs. 235 °C). Package marking and MSL rating remain identical, confirming mechanical and electrical interchangeability in production.

What is the thermal resistance and maximum channel temperature of the HMC647LP6?

The HMC647LP6 has a thermal resistance of 160 °C/W (channel to ground paddle) and a maximum channel temperature of 150 °C. The exposed paddle must be soldered to a thermally robust PCB ground plane with multiple vias to ensure reliable operation at full rated power. These parameters are defined in the Absolute Maximum Ratings table of the HMC647LP6 datasheet.