Analog Devices Inc. 131679-HMC813LC4B

Overview

HMC813LC4B from Analog Devices (formerly Hittite Microwave) is a Successive Detection Log Video Amplifier (SDLVA) designed for RF power measurement and logarithmic amplitude detection in high-speed channelized receivers. It operates from 1 to 20 GHz, delivers 55 dB logging range with ±1 dB log linearity (−40 to +0 dBm), features 5 ns rise / 10 ns fall time, and outputs a 15 mV/dB slope log video signal. It is deployed in electronic warfare and radar IFM front-ends where wideband dynamic range and nanosecond-level response are critical.

For engineers reviewing the HMC813LC4B datasheet, HMC813LC4B pinout, HMC813LC4B application, or HMC813LC4B equivalent, this page provides verified technical context, package mapping, real-world use scenarios, and validated alternative options - all grounded in the official HMC813LC4B v03.0614 datasheet and Analog Devices product documentation.

Technical Context

The HMC813LC4B implements a cascaded successive detection architecture across multiple gain stages to achieve precise logarithmic compression over 55 dB input range. Its RF input and output paths support single-ended operation via AC-coupled 50 Ω interfaces, with RF input return loss ≥8 dB and RF output return loss ≥18 dB across 1–20 GHz.

It uses three independent bias supplies (VCC1, VCC2, VCC3) and an enable pin (EN) to control power-up sequencing and low-power standby (<3 mA). The log video output is DC-coupled, requires ≥1 kΩ load, and exhibits ±0.5 dB log linearity variation over −55 to +85 °C at 10 GHz.

Key Specifications

Pinout & Package

Package: 24-lead, 4×4 mm ceramic SMT package (alumina body, gold-over-nickel plating, MSL3); exposed ground paddle must be soldered to PCB RF ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF logarithmic detection applications.

Compared with HMC813LC4B, HMC1099LP4E extends usable bandwidth downward and upward but increases power and board area, while LT5537 offers cost-effective narrowband logging without RF output-neither is pin-compatible, and both require redesign for drop-in replacement.

Availability

HMC813LC4B is available at Aetrix Electronics and suitable for electronic warfare receivers, radar direction-finding systems, and military-grade test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HMC813LC4B 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 acquired Hittite Microwave in 2014 and maintains its high-frequency RF product portfolio, including microwave amplifiers, mixers, and detectors, with focus on defense, aerospace, and communications infrastructure.

The HMC813LC4B belongs to Hittite's legacy SDLVA family, engineered specifically for high-speed, wideband RF amplitude measurement in electronic warfare and radar signal intelligence platforms.

FAQ

What is the operating frequency range of the HMC813LC4B?

The HMC813LC4B operates from 1 to 20 GHz with full specification compliance across the band, including ±1.5 dB frequency flatness in video output at −25 dBm input. Its RF input and output ports maintain ≥8 dB and ≥18 dB return loss respectively throughout this range, enabling direct integration into broadband microwave signal chains without external matching networks.

Does the HMC813LC4B provide an RF output signal in addition to the log video output?

Yes, the HMC813LC4B provides a limited RF output (RFOUTP/RFOUTN) alongside its primary log video output (Pin 10). The saturated RF output power is −7 dBm with ±1.5 dB flatness across 1–20 GHz, allowing it to serve as both a detector and a buffered RF tap for downstream components such as limiters or secondary receivers in channelized architectures.

What is the recommended load for the HMC813LC4B log video output?

The HMC813LC4B log video output (Pin 10) requires a minimum load resistance of 1 kΩ to maintain specified slope (15 mV/dB) and linearity (±1 dB). Lower loads degrade output voltage swing and introduce nonlinearity; the datasheet explicitly states "video output load should be 1K Ohm or higher" under all operating conditions including temperature extremes.

How does the enable pin (EN) affect power consumption of the HMC813LC4B?

When the EN pin (Pin 17) is pulled low (0 V), the HMC813LC4B enters standby mode with total supply current reduced to less than 3 mA - a reduction of >98% from its nominal 153 mA. This feature enables power-gated operation in pulsed or intermittent RF monitoring systems without requiring full power rail shutdown.

Is the HMC813LC4B compatible with standard FR4 PCBs, or does it require specialized materials?

The HMC813LC4B itself is compatible with FR4, but its 1–20 GHz RF performance requires controlled-impedance layout practices: 50 Ω signal traces, solid ground planes, and multiple vias connecting top/bottom grounds. For optimal RF integrity - especially above 10 GHz - Rogers 4350 or Arlon 25 FR substrates (as used on its official evaluation board 131679) are strongly recommended over standard FR4.