Analog Devices Inc. 105675-HMC434

Overview

105675-HMC434 from Analog Devices is an evaluation board for the HMC434 GaAs HBT MMIC prescaler IC, designed to validate divide-by-8 operation across 0.2–8 GHz RF input frequencies. It features SMA RF connectors (J1/J2), 3 V single-supply interface (J3/J4), and supports 50 Ω impedance-matched layout using Arlon 25FR or Rogers RO4350B PCB material.

For engineers reviewing the 105675-HMC434 datasheet, 105675-HMC434 pinout, 105675-HMC434 application, or 105675-HMC434 equivalent, this board enables rapid characterization of HMC434 phase noise (−150 dBc/Hz @ 100 kHz), output power (−2 dBm typ.), reverse leakage (−25 dBm), thermal performance (θJA = 359°C/W), and DC blocking requirements at IN/OUT pins.

Technical Context

The 105675-HMC434 is a complete, assembled evaluation platform-not a component-intended for bench validation of the HMC434 prescaler IC under real-world RF conditions. It implements verified RF routing, decoupling (C1–C4), ground via strategy, and controlled-impedance traces per Analog Devices' reference design.

It supports sine-wave inputs from 200 MHz to 8 GHz or square-wave inputs down to DC, with mandatory DC blocking at IN and OUT, and requires no external bias sequencing. The board uses two PCB-mount SMA connectors and discrete 0402/1206 passive components aligned to HMC434's absolute maximum ratings (VCC = −0.3 V to +3.5 V, RF input ≤13 dBm).

Key Specifications

Availability

105675-HMC434 is available at Aetrix Electronics and suitable for RF test lab validation, PLL prescaler prototyping, VSAT radio development, and IEEE 802.11a/HiperLAN system integration requiring stable component supply and traceable evaluation hardware.

Supply support for 105675-HMC434 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, Inc. is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, and aerospace markets since 1965.

The 105675-HMC434 belongs to Analog Devices' microwave evaluation board product line, engineered specifically to accelerate time-to-test for GaAs HBT prescalers used in C-band PLL systems and high-data-rate wireless infrastructure.

FAQ

What is the primary function of the 105675-HMC434 evaluation board?

The 105675-HMC434 evaluation board is a fully assembled platform designed exclusively to characterize the HMC434 divide-by-8 prescaler IC. It provides SMA RF interfaces, proper DC blocking, optimized decoupling (100 pF, 1000 pF, and 10 µF capacitors), and thermal grounding per the HMC434 datasheet. Engineers use the 105675-HMC434 to verify phase noise, output power, and frequency response without custom PCB development.

Does the 105675-HMC434 include the HMC434 IC?

Yes, the 105675-HMC434 evaluation board includes one mounted HMC434 IC (U1) as specified in Table 5 of the HMC434 Rev. G datasheet. The board also integrates all required passive components-including 0402 and 1206 capacitors-and PCB-mount SMA connectors for immediate RF testing.

What PCB materials are used in the 105675-HMC434 construction?

The 105675-HMC434 uses a hybrid stackup: Arlon 25FR or Rogers RO4350B for the RF signal layer (ensuring stable 50 Ω impedance up to 8 GHz), combined with standard FR4 for structural layers. This dual-material approach balances high-frequency performance with manufacturability and cost-explicitly documented in the HMC434 datasheet's PCB Material Stackup section.

Can the 105675-HMC434 be used with other prescaler ICs?

No-the 105675-HMC434 is mechanically and electrically optimized for the HMC434 alone. Its SOT-23 footprint (RJ-6), pin spacing, decoupling values, and ground via pattern match only the HMC434's 6-lead package, 3 V supply, and 62–83 mA current draw. Substituting other ICs would require redesign per their respective datasheets.

What are the critical layout practices validated by the 105675-HMC434?

The 105675-HMC434 validates three critical RF layout practices: (1) direct connection of HMC434 package ground leads to a solid ground plane, (2) sufficient via count between top/bottom ground planes, and (3) 50 Ω microstrip routing from SMA connectors to HMC434 IN/OUT pins. These practices are derived directly from the HMC434's Applications Information section and ensure minimal signal loss and phase noise degradation.