Analog Devices Inc. EV1HMC951BLP4

Overview

EV1HMC951BLP4 from Analog Devices is an evaluation board designed for the HMC951BLP4E GaAs MMIC I/Q downconverter, supporting RF input 5.6–8.6 GHz, 13 dB conversion gain, 24 dBc image rejection, 2 dB noise figure, and single 3.5 V supply operation in a 24-lead 4 mm × 4 mm SMT package. It enables rapid prototyping of microwave receiver front-ends for point-to-point radios and radar systems.

For engineers reviewing the EV1HMC951BLP4 datasheet, EV1HMC951BLP4 pinout, EV1HMC951BLP4 application, or EV1HMC951BLP4 equivalent, this evaluation PCB provides validated RF layout, integrated SMA/K connectors (J1–J3), DC feedthrough pins (J5–J8), and optimized bypassing (100 pF / 10 nF / 4.7 µF) for stable characterization of the HMC951BLP4E under real-world LO/RF/IF conditions.

Technical Context

The EV1HMC951BLP4 implements a fully populated reference design for the HMC951BLP4E, featuring Rogers 4350 substrate with controlled 50 Ω impedance routing, direct ground via stitching to the exposed paddle, and RF-optimized component placement aligned with the IC's internal LNA → image-reject mixer architecture. All critical RF paths-RFIN, LOIN, IF1, IF2-are terminated with high-frequency SMA or K connectors rated for >18 GHz.

It supports dual-sideband operation (LSB/USB) with external 90° hybrid at IF ports, accommodates IF frequencies from DC to 3.5 GHz, and maintains thermal stability via low-thermal-resistance grounding of the HMC951BLP4E's EPAD. The board is calibrated for +2 dBm LO drive and -20 dBm RF input per datasheet test conditions.

Key Specifications

Availability

EV1HMC951BLP4 is available at Aetrix Electronics and suitable for microwave receiver development, radar front-end validation, and satellite communication link testing requiring stable component supply and repeatable RF measurement infrastructure.

Supply support for EV1HMC951BLP4 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 defense markets with precision signal processing solutions.

The EV1HMC951BLP4 belongs to Analog Devices' evaluation platform family for microwave mixers, engineered to accelerate time-to-test for GaAs MMIC downconverters operating above 5 GHz.

FAQ

What is the primary function of the EV1HMC951BLP4 evaluation board?

The EV1HMC951BLP4 is a purpose-built evaluation PCB for the HMC951BLP4E I/Q downconverter. It provides a fully characterized RF environment-including matched 50 Ω SMA/K connectors, optimized power delivery, and thermal grounding-to enable accurate measurement of conversion gain, image rejection, noise figure, and linearity across 5.6–8.6 GHz. The EV1HMC951BLP4 does not contain active circuitry beyond passive support components.

Which RF connectors are used on the EV1HMC951BLP4 and what frequency range do they support?

The EV1HMC951BLP4 uses an SMA connector (J1) for the RFIN path and two K-type connectors (J2 for LOIN, J3 for IF output selection) rated for operation up to 26.5 GHz. These connectors maintain impedance integrity and minimize insertion loss across the HMC951BLP4E's specified 5.6–8.6 GHz RF band and extended LO range (4.5–12.1 GHz). All traces are impedance-controlled at 50 Ω using Rogers 4350 substrate.

Does the EV1HMC951BLP4 include bypass capacitors for the HMC951BLP4E power supplies?

Yes. The EV1HMC951BLP4 integrates three parallel bypass capacitor networks per power rail: 100 pF, 10 nF, and 4.7 µF (C1–C9), placed adjacent to pins 3 (VDRF), 4 (VDLO2), and 5 (VDLO1) of the HMC951BLP4E. This multi-stage filtering ensures stable DC bias under dynamic RF/LO loading and suppresses supply-induced spurs, directly implementing the manufacturer's recommended decoupling scheme.

Can the EV1HMC951BLP4 be used for both LSB and USB downconversion modes?

Yes. The EV1HMC951BLP4 supports both lower sideband (LSB) and upper sideband (USB) operation by allowing flexible IF port configuration. When used with an external 90° hybrid at J6/J7 (IF1/IF2), the board enables sideband-selective demodulation across the full 5.6–8.6 GHz RF band, as verified in datasheet plots for both LSB and USB image rejection, conversion gain, and IP3 performance.

Is thermal management addressed on the EV1HMC951BLP4 PCB layout?

Yes. The EV1HMC951BLP4 features a dedicated thermal land for the HMC951BLP4E's exposed paddle (EPAD), connected via ≥12 thermal vias to an internal and bottom-layer solid ground plane. This structure achieves low thermal resistance (<10 °C/W effective) and maintains channel temperature within the -40 °C to +85 °C operating range during continuous operation at full 200 mA supply current, per datasheet absolute maximum ratings.