Analog Devices Inc. HMC-C584

Overview

HMC-C584 from Analog Devices is a 0.1 GHz to 40 GHz, 5-bit GaAs digital attenuator with 1 dB LSB steps, ±1.0 dB typical bit error, and 43 dBm input IP3. It delivers 31 dB total attenuation range in hermetically sealed module form with field-replaceable K-type connectors, used in microwave radios and test instrumentation for precise RF signal level control.

For engineers reviewing the HMC-C584 datasheet, HMC-C584 pinout, HMC-C584 application, or HMC-C584 equivalent, key selection criteria include wideband 0.1–40 GHz operation, CMOS-compatible 0/5 V control logic, ±1.0 dB step accuracy, 7 dB typical insertion loss (0.1–30 GHz), and −55°C to +85°C operating temperature range.

Technical Context

The HMC-C584 implements a 5-bit binary-weighted attenuation architecture using GaAs IC technology, supporting discrete attenuation states from 0 dB to 31 dB in 1–2–4–8–16 dB increments. Its RF path is dc-coupled and 50 Ω matched at both RF1 and RF2 ports, requiring external blocking capacitors when dc bias differs from 0 V.

Control is executed via five independent 0 V / 5 V CMOS-compatible inputs (V1–V5), each driving one attenuation bit. The device operates from dual supplies: VDD = +5 V and VSS = −5 V, with specified switching times of 60 ns rise/fall and 90 ns on/off delay.

Key Specifications

Pinout & Package

The HMC-C584 is housed in a 10-lead hermetic module (package option HML-10-1) with field-replaceable K-type RF connectors and exposed ground plane for microstrip/coplanar integration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC624LP5E and PE43711, the HMC-C584 uniquely combines 40 GHz bandwidth, hermetic reliability, field-replaceable K-connectors, and dual-supply operation-making it irreplaceable in mission-critical mmWave systems where environmental robustness and connectorized serviceability are mandatory.

Availability

HMC-C584 is available at Aetrix Electronics and suitable for microwave radios, test instrumentation, military ECM systems, and space communication payloads requiring stable component supply across extended temperature and frequency ranges.

Supply support for HMC-C584 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 is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and defense markets since 1965.

The HMC-C584 belongs to Analog Devices' Hittite Microwave product line, engineered specifically for broadband RF/microwave systems demanding hermetic reliability, wideband linearity, and field-serviceable connectivity.

FAQ

What is the maximum RF input power the HMC-C584 can handle before compression?

The HMC-C584 has an input power for 0.1 dB compression of 25 dBm from 0.5 GHz to 40 GHz. At lower frequencies (0.1–0.5 GHz), the compression point drops to 20 dBm. This specification defines the upper limit of linear operation-exceeding it introduces gain compression and harmonic distortion. System designers must ensure peak RF input to the HMC-C584 stays below these thresholds to preserve signal fidelity in applications like radar and test equipment.

Does the HMC-C584 require external blocking capacitors on its RF ports?

Yes, the HMC-C584 RF1 and RF2 ports are dc-coupled and internally matched to 50 Ω, so external blocking capacitors are required whenever the connected RF line carries a dc bias different from 0 V. This prevents unintended current flow through the GaAs core and maintains impedance integrity. The datasheet explicitly states this requirement in the Pin Function Descriptions table for both RF pins.

Can the HMC-C584 operate with only a single positive supply voltage?

No, the HMC-C584 requires dual supplies: VDD = +5 V and VSS = −5 V. Its internal GaAs circuitry and level-shifting control buffers depend on this symmetric rail configuration. Attempting to operate with only a single supply will result in improper biasing, degraded attenuation accuracy, and potential damage. The Absolute Maximum Ratings table confirms VSS must be −4.5 V to −5.5 V for reliable operation.

What is the significance of the ±1.0 dB typical bit error specification for the HMC-C584?

The ±1.0 dB typical bit error quantifies the deviation between ideal and actual attenuation per bit (e.g., 1 dB, 2 dB, etc.) across frequency and temperature. It directly impacts system-level accuracy in automatic gain control loops and calibration routines. For the HMC-C584, this tolerance is measured under standard conditions (25°C, 0.1–30 GHz) and supports predictable error budgeting in high-precision RF designs such as satellite modems and electronic warfare receivers.

Is the HMC-C584 pinout compatible with other Hittite digital attenuators like the HMC624LP5E?

No, the HMC-C584 is not pin-compatible with the HMC624LP5E. The HMC-C584 uses a 10-lead hermetic module with K-connectors and dual-rail supply pins (VDD/VSS), while the HMC624LP5E is a 32-lead QFN with single 3.3 V supply and no RF connectors. Their pin counts, functions, physical layout, and interface architecture differ fundamentally-requiring distinct PCB layouts and power delivery networks.