Analog Devices Inc. EVAL01-HMC624LFP4E

Overview

EVAL01-HMC624LFLP4E from Hittite Microwave Corporation is an evaluation PCB designed to validate the HMC624LFLP4E - a 0.5 dB LSB, 6-bit GaAs MMIC digital attenuator operating from 60–500 MHz in a 4×4 mm QFN package. It supports serial (SPI-compatible), latched parallel, and direct parallel control modes, features user-selectable power-up states, and requires no external matching components for RF paths.

For engineers reviewing the EVAL01-HMC624LFLP4E datasheet, EVAL01-HMC624LFLP4E pinout, EVAL01-HMC624LFLP4E application, or EVAL01-HMC624LFLP4E equivalent, this board enables rapid characterization of attenuation accuracy, switching speed (≤60 ns), input IP3 (+55 dBm at 100–500 MHz), and insertion loss (1.2 dB typ.) under real-world IF signal chain conditions with SMA RF interfaces and configurable DIP-switch digital control.

Technical Context

The EVAL01-HMC624LFLP4E implements a fully populated reference design for the HMC624LFLP4E digital attenuator, using 0.1 µF 0402 capacitors (C1–C6) for wideband DC blocking and bias decoupling across 60–500 MHz, with 50 Ω controlled-impedance RF traces and direct ground-plane connection via multiple vias to the exposed paddle and GND pins (5, 14).

It integrates dual-mode digital control: SPDT DIP switches (SW1/SW2) configure parallel inputs (D0–D5, PUP1/PUP2) and mode selection (P/S), while J3 provides 18-pin DC header access to all digital control lines (SERIN, CLK, LE, SEROUT), Vdd (3V/5V selectable), and ground - enabling full functional validation of serial cascading, latch timing (tLEW ≥10 ns), and power-up state retention.

Key Specifications

Availability

EVAL01-HMC624LFLP4E is available at Aetrix Electronics and suitable for cellular infrastructure, microwave radio, and test equipment development requiring stable component supply, validated reference designs, and fast-turn RF evaluation platforms.

Supply support for EVAL01-HMC624LFLP4E 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

Hittite Microwave Corporation (now part of Analog Devices) specialized in high-performance RF, microwave, and millimeter-wave ICs, with expertise in GaAs MMIC design and high-speed digital control integration.

The EVAL01-HMC624LFLP4E belongs to Hittite's evaluation platform product line, engineered to accelerate prototyping and performance verification of digitally controlled RF components in IF and wireless infrastructure applications.

FAQ

What is the primary function of the EVAL01-HMC624LFLP4E evaluation board?

The EVAL01-HMC624LFLP4E evaluation board is a fully assembled reference design that enables functional and RF performance validation of the HMC624LFLP4E 6-bit digital attenuator. It provides SMA RF I/O, configurable DIP-switch digital control, and header-based serial interface access - allowing engineers to verify attenuation accuracy, switching speed, return loss, and power-up behavior without custom PCB development. The board directly supports the HMC624LFLP4E's full specification set across 60–500 MHz.

Does EVAL01-HMC624LFLP4E support both serial and parallel control modes for the HMC624LFLP4E?

Yes, EVAL01-HMC624LFLP4E supports all three control modes of the HMC624LFLP4E: serial (via SERIN/CLK/LE header pins), latched parallel (using SW1/SW2 to set D0–D5 and pulse LE), and direct parallel (LE held high). The board's DIP switches configure logic levels for P/S, D0–D5, and PUP1/PUP2, while the 18-pin DC header allows external microcontroller or FPGA control - enabling full validation of timing parameters like tLEW (≥10 ns) and tLES (≥630 ns).

What RF performance metrics can be measured using EVAL01-HMC624LFLP4E?

Using EVAL01-HMC624LFLP4E, engineers can measure key RF metrics of the HMC624LFLP4E including insertion loss (1.2 dB typ.), attenuation range (31.5 dB), attenuation accuracy (±0.20 + 1% of setting up to 300 MHz), input/output return loss (≥20 dB), switching speed (tRise/tFall ≤30 ns), and input IP3 (+55 dBm at 100–500 MHz). The board's 50 Ω matched layout and SMA interfaces ensure measurement integrity across the full 60–500 MHz band.

How is power delivered to the HMC624LFLP4E on the EVAL01-HMC624LFLP4E board?

Power is delivered to the HMC624LFLP4E via the J3 18-pin DC header, supporting either +3 V or +5 V supply as specified in the HMC624LFLP4E bias voltage table. The board includes 100 kΩ pull-up/down resistors (R1–R14) for digital control lines and uses 0.1 µF 0402 capacitors (C1–C6) for local Vdd decoupling and RF path DC blocking - ensuring stable operation per the device's absolute maximum ratings (Vdd ≤5.6 V, continuous Pdiss = 0.635 W at +85 °C).

Is the EVAL01-HMC624LFLP4E RoHS compliant and compatible with standard reflow profiles?

Yes, EVAL01-HMC624LFLP4E hosts the RoHS-compliant HMC624LFLP4E in a 4×4 mm QFN package with 100% matte tin lead finish (MSL1 rating). The Arlon 25FR PCB substrate and all mounted components - including 0402 MLCCs and resistors - meet RoHS requirements. The board supports standard lead-free reflow with peak temperature up to 260 °C, consistent with the HMC624LFLP4E's package marking and JEDEC MSL1 guidelines.