Analog Devices Inc. HMC495LP3ETR

Overview

HMC495LP3ETR from Analog Devices (formerly Hittite Microwave) is a SiGe wideband direct quadrature modulator RFIC designed for RF signal upconversion in digital communication systems. It operates from 250 MHz to 3800 MHz, delivers −5 dBm typical RF output power, achieves 38 dBc uncalibrated carrier suppression, and supports baseband inputs up to 250 MHz - enabling use in UMTS/GSM/CDMA basestations and W-CDMA transceivers.

For engineers reviewing the HMC495LP3ETR datasheet, HMC495LP3ETR pinout, HMC495LP3ETR application, or HMC495LP3ETR equivalent, key selection criteria include its single-ended 50 Ω RF output match, −6 to +6 dBm LO drive range (differential or single-ended), +3.3 V @ 108 mA supply requirement, and calibrated sideband suppression performance across temperature.

Technical Context

The HMC495LP3ETR implements a direct-conversion quadrature architecture with differential I/Q baseband inputs and a dual-path LO-driven mixer core. Its RF output stage integrates on-die matching to 50 Ω, eliminating external baluns or matching networks. The device uses separate bias supplies (VB1, VB2) and dual Vcc rails (Vcc1, Vcc2) to independently optimize LO-stage linearity and RF-output P1dB/IP3.

Carrier and sideband suppression are tunable via DC bias adjustment on I/Q ports (Ip/In, Qp/Qn) and VB2, enabling calibration for specific bands and LO power levels. Performance remains stable across −40 °C to +85 °C, with uncalibrated suppression specified at 38 dBc (carrier) and 34 dBc (sideband) at +25 °C.

Key Specifications

Pinout & Package

Package: 3 mm × 3 mm, 16-lead QFN (LP3) with exposed thermal paddle. Requires soldering all ground leads (Pins 1, 4, 9, 12) and paddle to PCB RF ground per Hittite Application Note.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wideband quadrature modulator applications.

Compared with ADL5375-05 and TRF3705, the HMC495LP3ETR offers unique manual I/Q and VB2 calibration capability for optimizing suppression over temperature and frequency - critical for high-performance 3G/4G basestation designs where uncalibrated 38 dBc carrier suppression and −158 dBm/Hz noise floor are mandatory.

Availability

HMC495LP3ETR is available at Aetrix Electronics and suitable for UMTS basestation development, ISM-band transceiver design, and fixed wireless access equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HMC495LP3ETR 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 RFIC portfolio, emphasizing precision microwave components for communications and defense.

The HMC495LP3ETR belongs to Hittite's legacy wideband modulator product line, engineered specifically for direct-conversion transmitter architectures in cellular infrastructure and broadband wireless systems.

FAQ

What is the RF frequency range supported by the HMC495LP3ETR?

The HMC495LP3ETR supports a continuous RF frequency range from 250 MHz to 3800 MHz. This covers major cellular bands (700, 800, 900, 1800, 1900, 2100, 2600 MHz), ISM bands (915 MHz, 2.4 GHz), and WiMAX (3.5 GHz). Measured performance - including output power, IP3, and noise floor - is validated across this full span per the datasheet's frequency sweeps.

Does the HMC495LP3ETR require external matching components on the RF output?

No, the HMC495LP3ETR features an internally matched 50 Ω single-ended RF output port (Pin 11). No external balun, transformer, or matching network is needed. A series AC-coupling capacitor is required to block DC from the RF path, but impedance transformation or resonance tuning is unnecessary due to the integrated broadband match.

How is carrier suppression tuned on the HMC495LP3ETR?

Carrier suppression on the HMC495LP3ETR is tuned by adjusting the DC bias voltage on the differential I/Q input pairs: Ip/In (Pins 14/15) and Qp/Qn (Pins 6/7). A typical offset voltage <5 mV optimizes suppression at a given LO power and frequency. The datasheet specifies 38 dBc uncalibrated and higher values after manual DC offset calibration.

What LO drive level does the HMC495LP3ETR require, and can it accept single-ended input?

The HMC495LP3ETR accepts LO input power from −6 dBm to +6 dBm. It supports both differential (Pins 2/3) and single-ended modes: in single-ended mode, one LO pin is driven while the other is terminated with a 50 Ω resistor to ground, and a 68 Ω shunt resistor improves port VSWR. No external LO amplifier is required within this range.

Is the HMC495LP3ETR pin-compatible with the HMC495LP3?

Yes, the HMC495LP3ETR is the RoHS-compliant, matte tin–plated version of the HMC495LP3 and shares identical pinout, electrical specifications, and mechanical outline. The only differences are lead finish (100% matte Sn vs. Sn/Pb), peak reflow temperature (260 °C vs. 235 °C), and MSL1 rating - making HMC495LP3ETR a drop-in replacement in new designs.