Analog Devices Inc. EV1HMC792ALP4

Overview

EV1HMC792ALP4 from Hittite Microwave Corporation is an evaluation board for the HMC792ALP4E GaAs MMIC 6-bit digital attenuator, supporting DC–6 GHz RF/IF signal conditioning in test equipment and infrastructure systems. It provides full access to all 24 pins, includes SMA RF connectors (J1/J2), DC power interface (J3), on-board ACG capacitors (C4–C6), and uses Arlon 25FR or Rogers 4350 PCB material for controlled-impedance 50 Ω routing.

For engineers reviewing the EV1HMC792ALP4 datasheet, EV1HMC792ALP4 pinout, EV1HMC792ALP4 application, or EV1HMC792ALP4 equivalent, this board enables rapid validation of HMC792ALP4E attenuation accuracy (±0.2 + 3% of setting), low insertion loss (1.8 dB @ 2 GHz), high IP3 (+53 dBm), serial/parallel control interface timing, and power-up state selection across temperature (–40°C to +85°C).

Technical Context

The EV1HMC792ALP4 implements a complete reference design for the HMC792ALP4E attenuator, featuring matched 50 Ω RF paths with SMA connectors, dedicated ground vias beneath the QFN paddle, and optimized placement of ACG capacitors (330 pF, 0402) for near-DC operation down to 100 MHz. It supports both serial (SPI-compatible SERIN/CLK/LE) and latched parallel (D0–D5) control modes with configurable PUP1/PUP2 power-up states.

Board-level design adheres to RF layout best practices: top-layer signal traces maintain 50 Ω impedance; package ground leads and exposed thermal paddle are soldered directly to internal ground planes via ≥12 thermal vias; and DC blocking capacitors (C1/C2 = 100 pF, C3 = 1000 pF) enable broadband biasing without external matching.

Key Specifications

Availability

EV1HMC792ALP4 is available at Aetrix Electronics and suitable for RF test equipment development, microwave radio prototyping, and 4G/WiMAX baseband verification requiring stable component supply, repeatable RF characterization, and fast-turn evaluation of digitally controlled attenuation.

Supply support for EV1HMC792ALP4 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 (acquired by Analog Devices in 2014) specialized in high-performance RF, microwave, and millimeter-wave ICs for communications, defense, and instrumentation markets.

The EV1HMC792ALP4 belongs to Hittite's evaluation platform family designed specifically to accelerate time-to-test for their GaAs MMIC attenuators, enabling immediate functional validation of serial/parallel control, power-up behavior, and RF linearity without custom PCB design.

FAQ

What is the purpose of the EV1HMC792ALP4 evaluation board?

The EV1HMC792ALP4 is a ready-to-use evaluation PCB for the HMC792ALP4E 6-bit GaAs digital attenuator. It provides full RF and digital signal access, pre-routed 50 Ω paths, SMA connectors, and proper ACG capacitor placement to validate insertion loss, attenuation accuracy, switching speed, and control interface functionality across DC–6 GHz before integrating into final systems.

Does the EV1HMC792ALP4 support both serial and parallel control modes for the HMC792ALP4E?

Yes, the EV1HMC792ALP4 fully supports both control interfaces of the HMC792ALP4E: the 3-wire serial interface (SERIN, CLK, LE, P/S) and latched parallel mode (D0–D5, LE). All relevant pins are brought out to test points and headers, allowing direct connection to FPGA or microcontroller GPIOs for real-time attenuation state programming and verification.

What RF performance can be expected when using the EV1HMC792ALP4 with the HMC792ALP4E?

When used with the HMC792ALP4E, the EV1HMC792ALP4 delivers measured RF performance aligned with datasheet specs: insertion loss ≤2.4 dB (DC–3 GHz) and ≤4.0 dB (3–6 GHz), return loss ≥18 dB across DC–6 GHz, and input IP3 ≥53 dBm. Performance is maintained via controlled-impedance routing, low-loss PCB material, and proper grounding per Hittite's recommended land pattern.

How is power delivered to the HMC792ALP4E on the EV1HMC792ALP4 board?

Power is delivered to the HMC792ALP4E via the J3 18-pin DC connector, supporting single +3 V or +5 V supply as specified for the HMC792ALP4E. On-board decoupling includes C1/C2 (100 pF) and C3 (1000 pF) to suppress supply noise, and Vdd (Pin 18) is routed with low-inductance geometry to minimize switching transients affecting attenuation stability.

Can the EV1HMC792ALP4 be used to evaluate power-up state behavior of the HMC792ALP4E?

Yes, the EV1HMC792ALP4 provides direct access to PUP1 and PUP2 pins (Pins 16 and 17) and supports configuration of the HMC792ALP4E's programmable power-up state. Users can set logic levels on these pins during power-on to select attenuation states from –15.75 dB to 0 dB per the PUP truth table, and verify latch behavior within ~200 ms after Vdd stabilization.