Analog Devices Inc. 124133-HMC662LP3E

Overview

HMC662LP3E from Analog Devices (formerly Hittite Microwave) is a logarithmic RF power detector IC designed for microwave signal monitoring in 8–30 GHz systems. It delivers >54 dB dynamic range up to 28 GHz, +13.3 mV/dB nominal output slope at 18 GHz, and -127 dBm intercept at 18 GHz, enabling precise wideband RSSI and power control in point-to-point radio front-ends.

For engineers reviewing the HMC662LP3E datasheet, HMC662LP3E pinout, HMC662LP3E application, or HMC662LP3E equivalent, this device supports high-frequency log detection with fast 5 ns rise time, single +3.3 V supply operation, and integrated enable control - critical for VSAT receiver AGC loops and microwave test instrumentation requiring stable DC output vs. RF input power.

Technical Context

The HMC662LP3E implements successive compression architecture using cascaded limiting amplifiers whose saturation points collectively approximate a logarithmic transfer function across 8–30 GHz. Its output voltage is generated by summing detector outputs, converting to voltage domain, and buffering via LOG OUT.

It features dual bias supplies (Vcc1, Vcc2), EN-controlled power-down mode (<3 mA), AC-coupled RFIN with external capacitor to AC GND, and requires ≥1 kΩ load on LOG OUT. Thermal design relies on soldering all ground pins and the exposed paddle to RF/DC ground per MSL1-compliant 3×3 mm QFN package.

Key Specifications

Pinout & Package

Package: 16-lead 3×3 mm RoHS-compliant QFN with exposed thermal paddle (MSL1, peak reflow 260°C). Ground leads (pins 6, 7) and paddle must be soldered to PCB RF/DC ground per HMC application note land pattern.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADL5513ACPZ-R7 and HMC1098LP3E, the HMC662LP3E uniquely supports full 8–30 GHz operation with ≥54 dB dynamic range and +3.3 V compatibility - making it the only option among the three qualified for next-generation Ka-band VSAT and E-band point-to-point radios requiring minimal BOM count and no external compensation.

Availability

HMC662LP3E is available at Aetrix Electronics and suitable for point-to-point microwave radio, VSAT terminal, and test & measurement instrument applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant SMT packaging.

Supply support for HMC662LP3E 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 integrates its high-frequency RF IC portfolio into precision signal processing and microwave solutions for communications and defense markets.

The HMC662LP3E belongs to Analog Devices' high-frequency logarithmic detector product line, engineered specifically for microwave radio, satellite communications, and instrumentation requiring wideband, temperature-stable RF power measurement without external calibration.

FAQ

What is the operating frequency range of the HMC662LP3E?

The HMC662LP3E operates from 8 GHz to 30 GHz, covering key bands including X, Ku, K, and Ka. Its specified ±3 dB dynamic range extends to 28 GHz, and it maintains functional log detection up to 30 GHz per datasheet characterization. This makes the HMC662LP3E suitable for modern high-frequency wireless infrastructure and satellite communication systems where wide instantaneous bandwidth is essential.

Does the HMC662LP3E require dual power supplies?

Yes, the HMC662LP3E requires two separate +3.3 V bias supplies: Vcc1 (pins 14–16) powers the detector chain, and Vcc2 (pin 13) powers the amplifier chain. Both must be independently filtered and ramped within 100 µs at startup. This separation improves PSRR and reduces inter-stage coupling, directly supporting the device's >54 dB dynamic range and low log error across temperature.

How is the LOG OUT output loaded for optimal accuracy?

The HMC662LP3E LOG OUT (pins 10–11) requires a minimum load resistance of 1 kΩ to maintain specified log linearity and slope accuracy. Lower loads increase output current and introduce nonlinearity due to internal buffer limitations. For best performance, connect LOG OUT to a high-impedance ADC input or op-amp buffer stage - never directly to low-Z traces or unterminated cables.

What is the role of the AC GND pin (pin 3) on the HMC662LP3E?

Pin 3 (AC GND) serves as the AC ground reference for the RFIN path. It must be connected to RF ground via an external capacitor (typically 1 pF, 0201 package) placed adjacent to the package. This establishes a stable RF return path for the input signal, minimizing parasitic inductance and ensuring consistent input match and log accuracy across 8–30 GHz - omission degrades return loss and increases log error.

Can the HMC662LP3E be used in power-down mode during system sleep cycles?

Yes, the HMC662LP3E supports active power-down via the EN pin (pin 12). Driving EN to 0 V reduces total supply current from 88 mA to <3 mA while preserving state and enabling wake-up in <1 µs. This feature is validated for duty-cycled applications such as portable spectrum analyzers and battery-backed monitoring nodes where average power consumption must remain below 10 mW.