Analog Devices Inc. HMC915LP4ETR

Overview

HMC915LP4ETR from Hittite Microwave Corporation is a GaAs MMIC double-balanced mixer with integrated LO amplifier, operating from 0.5 to 2.7 GHz RF/LO and DC–1.0 GHz IF, delivering +28 dBm input IP3, 8 dB typical conversion loss, and 28 dB LO-to-RF isolation for upconverter/downconverter roles in wireless infrastructure.

For engineers reviewing the HMC915LP4ETR datasheet, HMC915LP4ETR pinout, HMC915LP4ETR application, or HMC915LP4ETR equivalent, key selection criteria include its -2 to +4 dBm LO drive range, +5 V / 88 mA single-supply operation, 24-lead 4×4 mm SMT package, and compatibility with PCS/3G, WiMAX, and ISM base station signal chains.

Technical Context

The HMC915LP4ETR implements a double-balanced Gilbert-cell mixer topology with monolithically integrated LO driver, enabling high linearity without external baluns. Its RF and LO ports are DC-coupled and 50 Ω matched, while the IF port supports DC coupling with current-limiting constraints (≤18 mA).

It operates as both upconverter and downconverter with low-side LO injection, delivers stable conversion gain across temperature (-40°C to +85°C), and maintains ≥22 dB LO-to-RF isolation over full RF band-critical for suppressing LO leakage in sensitive receiver front-ends.

Key Specifications

Pinout & Package

Package: 24-lead 4×4 mm leadless plastic QFN (LP4E) with exposed ground paddle; RoHS-compliant, MSL1, 260°C peak reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC552LP4E and HMC215LP4E, the HMC915LP4ETR provides the highest input linearity in the LP4E family-making it optimal for spectrally crowded 0.5–2.7 GHz infrastructure where IP3 directly impacts adjacent-channel selectivity and ACLR compliance.

Availability

HMC915LP4ETR is available at Aetrix Electronics and suitable for PCS/3G infrastructure, WiMAX base stations, and ISM band repeaters requiring stable component supply, long-term lifecycle support, and traceable GaAs MMIC sourcing.

Supply support for HMC915LP4ETR 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 (now part of Analog Devices) specialized in high-performance RFICs and MMICs for wireless infrastructure, defense, and test equipment through advanced GaAs and GaN process technologies.

The HMC915LP4ETR belongs to Hittite's high-linearity mixer product line, engineered specifically for cellular and broadband wireless base station front-ends demanding wide IF bandwidth, low conversion loss, and integrated LO drive.

FAQ

What is the maximum RF input power rating for the HMC915LP4ETR?

The HMC915LP4ETR has an absolute maximum RF input power rating of +23 dBm. Exceeding this level risks permanent damage to the GaAs die. For reliable operation, the input P1dB is specified at +18 dBm (min), so linear operation should be maintained below that level-especially in multi-tone or modulated signal environments where peak-to-average ratio increases effective stress on the device.

Does the HMC915LP4ETR require external DC blocking capacitors on all RF ports?

The HMC915LP4ETR requires an external DC blocking capacitor only on the LO pin (Pin 5); the MIX LO (Pin 1) and RF (Pin 18) ports are internally DC-coupled and 50 Ω matched, allowing direct connection to bias-tolerant sources or filters. The IF port (Pin 10) is also DC-coupled but must not source or sink more than 18 mA-so DC blocking is optional unless DC current flow is unavoidable in the IF path.

Can the HMC915LP4ETR operate in both upconverter and downconverter configurations?

Yes, the HMC915LP4ETR supports both upconversion and downconversion modes. Datasheet measurements confirm performance in both configurations using low-side LO injection. Application circuits show flexibility in IF placement-enabling use in zero-IF receivers or high-side LO transmitters-provided external filtering and matching networks are adapted to the chosen signal flow direction and frequency plan.

What is the recommended PCB grounding strategy for the HMC915LP4ETR?

The HMC915LP4ETR requires all ground pins (Pins 4, 24, and others marked N/C) plus the exposed ground paddle to be soldered to a solid, low-inductance RF ground plane. At least eight thermal vias (0.3 mm diameter, spaced ≤1 mm apart) under the paddle are recommended. Signal traces must maintain 50 Ω impedance, and ground return paths for RF/IF lines must be direct and uninterrupted to preserve isolation and minimize spurious responses.

Is the HMC915LP4ETR pin-compatible with newer Analog Devices mixer offerings?

No documented pin-compatible replacements exist in Analog Devices' post-acquisition portfolio for the HMC915LP4ETR. While ADI offers mixers like the ADMV1013 or HMC series derivatives, none share identical pinout, biasing scheme, or internal LO amplifier integration. Migration requires layout revision and validation; the HMC915LP4ETR remains supported via legacy sourcing channels and is recommended for designs already qualified to its electrical and mechanical specifications.