Analog Devices Inc. 118329-HMC627LP5

Overview

HMC627LP5 from Hittite Microwave Corporation is a GaAs MMIC 6-bit digital variable gain amplifier operating from 50 MHz to 1 GHz, delivering programmable gain from −11.5 dB attenuation to +20 dB in 0.5 dB steps, with +36 dBm output IP3 and 4.3 dB noise figure at maximum gain - ideal for cellular infrastructure IF/RF signal chains.

For engineers reviewing the HMC627LP5 datasheet, HMC627LP5 pinout, HMC627LP5 application, or HMC627LP5 equivalent, this page provides verified functional context, real-world interface timing, gain accuracy across frequency bands, RoHS-compliant 5×5 mm QFN package details, and validated alternative options for RF front-end design.

Technical Context

The HMC627LP5 implements a digitally controlled attenuator-amplifier architecture with dual-mode control: 3-wire SPI (SERIN/CLK/LE) or 6-bit parallel (D0–D5), supporting both direct and latched modes. Its gain state is retained while LE is low, enabling glitch-free updates.

It features user-selectable power-up states via PUP1/PUP2 pins or D0–D5 inputs, serial output (SEROUT) for cascading, TTL/CMOS-compatible logic thresholds, and operates from a single +5 V supply drawing 110 mA typical. No external matching components are required.

Key Specifications

Pinout & Package

Package: 32-lead 5×5 mm RoHS-compliant QFN leadless package (MSL1, Sn/Pb finish); exposed paddle must be soldered to PCB RF ground per Hittite land pattern guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital variable gain amplifier applications.

Compared with HMC627LP5, HMC627LP5E offers identical electrical performance with RoHS-compliant packaging, while QM11020 trades gain precision and interface flexibility for broader frequency range - making HMC627LP5 optimal for narrowband, high-linearity, multi-device RF control systems.

Availability

HMC627LP5 is available at Aetrix Electronics and suitable for cellular infrastructure, microwave radio backhaul, and RF test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for HMC627LP5 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 was a U.S.-based RF/microwave semiconductor company specializing in high-performance analog and mixed-signal ICs for defense, communications, and instrumentation markets before its acquisition by Analog Devices in 2014.

The HMC627LP5 belongs to Hittite's digitally controlled variable gain amplifier product line, designed specifically for high-linearity, low-noise RF signal conditioning in wireless infrastructure and test systems operating below 1 GHz.

FAQ

What is the gain control resolution and total range of the HMC627LP5?

The HMC627LP5 provides 0.5 dB least significant bit (LSB) resolution across a total gain control range of 31.5 dB, spanning from −11.5 dB attenuation to +20 dB gain. This 6-bit digital control allows precise, repeatable RF level adjustment without analog calibration, and is validated across its full 50 MHz to 1 GHz operating band.

Does the HMC627LP5 require external matching components?

No, the HMC627LP5 does not require external matching components. Its RF input (AMPIN) and output (AMPOUT) ports are internally matched to 50 Ω, and the device operates with no external baluns, transformers, or LC networks. Only DC blocking capacitors on AMPIN, ATTIN, and ATTOUT are required per application frequency.

How does the power-up state selection work on the HMC627LP5?

The HMC627LP5 supports user-selectable power-up states via PUP1/PUP2 pins (if LE is low at startup) or D0–D5 inputs (if LE is high). The PUP truth table defines eight possible default gain states from −31.5 dB to 0 dB. The device latches the selected state approximately 200 ms after power-on, eliminating boot-time gain uncertainty.

What are the supply voltage and current requirements for the HMC627LP5?

The HMC627LP5 operates from a single +5 V supply (Vdd) with absolute maximum rating of 5.6 V. Typical supply current is 110 mA at +5 V and +25 °C. The device draws no current from Vs (bias supply) beyond the 88 mA specified for the internal bias circuitry - total system supply must accommodate both rails if used.

Can multiple HMC627LP5 devices be controlled using a single serial interface?

Yes, the HMC627LP5 includes a SEROUT pin that outputs the serial input data delayed by six clock cycles, enabling daisy-chained configuration. Up to 16 devices can be driven from one SPI bus by connecting SEROUT of one device to SERIN of the next, reducing GPIO usage and simplifying firmware control in multi-channel RF systems.