Analog Devices Inc. HMC697LP4ETR

Overview

HMC697LP4ETR from Analog Devices (formerly Hittite Microwave) is a SiGe wideband direct quadrature modulator IC designed for RF upconversion in digital communication systems. It operates from 200 MHz to 4000 MHz, delivers +8 dBm typical output P1dB, achieves −165 dBm/Hz noise floor at 20 MHz offset, and provides +22 dBm typical OIP3 - enabling high-fidelity modulation in cellular base stations and WiMAX transceivers.

For engineers reviewing the HMC697LP4ETR datasheet, HMC697LP4ETR pinout, HMC697LP4ETR application, or HMC697LP4ETR equivalent, key selection criteria include its 4×4 mm QFN-24 package, single-ended or differential LO drive capability (−6 to +6 dBm), 50 Ω matched RFOUT, calibrated sideband suppression ≥42 dBc, and support for GMSK/QPSK/QAM waveforms without external matching.

Technical Context

The HMC697LP4ETR integrates I/Q mixers, LO buffer, and RF output stage in a monolithic SiGe process. Its architecture supports both single-ended and differential LO input (pins 3/4), with baseband inputs (pins 9/10, 21/22) biased at +1.5 V DC and accepting 1.6 V_pp differential signals. The RF output (pin 16) is DC-coupled and internally matched to 50 Ω.

It requires dual +5 V supplies (Vcc1 = 79 mA, Vcc2 = 88 mA), operates from −40 °C to +85 °C, and achieves uncalibrated carrier feedthrough as low as −40 dBm and sideband suppression up to 45 dBc across 2.2–2.7 GHz. Calibration improves suppression but requires manual I/Q amplitude/phase and DC offset adjustment.

Key Specifications

Pinout & Package

Package: 24-lead 4×4 mm QFN with exposed ground paddle (RoHS-compliant matte Sn finish, MSL1, max reflow 260 °C). Pin 1 marked by dot; ground paddle must be soldered to PCB ground plane with ≥8 thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADL5375-05 and TRF3705, the HMC697LP4ETR offers superior uncalibrated sideband suppression across 2.2–2.7 GHz and native 5 V operation - making it optimal for fixed-wireless infrastructure where calibration complexity must be minimized and system voltage rails are standardized at 5 V.

Availability

HMC697LP4ETR is available at Aetrix Electronics and suitable for cellular infrastructure, fixed wireless access, and ISM transceiver designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for HMC697LP4ETR 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 for communications and defense applications.

The HMC697LP4ETR belongs to the Hittite legacy SiGe direct-conversion modulator family, engineered specifically for wideband wireless infrastructure requiring high linearity, low noise, and simplified RF front-end integration.

FAQ

What is the recommended LO drive level for optimal performance of the HMC697LP4ETR?

The HMC697LP4ETR specifies −6 to +6 dBm LO input power for full performance. At 0 dBm, it achieves +22 dBm typical OIP3 and −165 dBm/Hz noise floor. Driving at +6 dBm improves sideband suppression by ~2 dB but increases current draw slightly; −6 dBm remains viable for low-power modes with minor OIP3 reduction.

Does the HMC697LP4ETR require external RF matching components at the output?

No. The HMC697LP4ETR features an internally matched 50 Ω RF output port (pin 16), eliminating the need for external matching networks. Only an AC-blocking capacitor is required in series with the RFOUT path to prevent DC coupling to downstream stages.

Can the HMC697LP4ETR operate with single-ended baseband inputs?

Yes. While optimized for differential I/Q drive (1.6 V_pp), the HMC697LP4ETR's high-impedance baseband inputs (pins 9/10, 21/22) accept single-ended signals referenced to +1.5 V DC. Performance metrics like sideband suppression may degrade by 3–5 dB compared to differential operation.

What is the thermal resistance and maximum junction temperature of the HMC697LP4ETR?

The HMC697LP4ETR has a channel-to-ground-paddle thermal resistance (R_th) of 20.2 °C/W. Its absolute maximum junction temperature is 150 °C, with continuous power dissipation rated at 3.2 W at T_A = 85 °C (derated 49.6 mW/°C above 85 °C).

Is the HMC697LP4ETR pin-compatible with other devices in the HMC697 family?

Yes. The HMC697LP4ETR shares identical pinout, package dimensions, and footprint with the non-RoHS HMC697LP4. Both use the same 4×4 mm QFN-24 LP4 package and have identical pin functions, allowing drop-in replacement where RoHS compliance is required.