Analog Devices Inc./Maxim Integrated MAX2473EUT+T

Overview

MAX2473EUT+T from Maxim Integrated is a 50Ω broadband RF gain block amplifier optimized for PA predriver, LNA, and cascadable 50Ω amplifier roles in 40MHz–4000MHz systems. It delivers +19.5dBm P1dB output power, 18.6dB small-signal gain at 1GHz, 2.0dB noise figure at 2GHz, and operates from a +3V to +5.25V supply. It is used in cellular infrastructure base stations requiring flat gain response across LTE bands.

For engineers reviewing the MAX2473EUT+T datasheet, MAX2473EUT+T pinout, MAX2473EUT+T application, or MAX2473EUT+T equivalent, key selection criteria include its 40MHz–4000MHz bandwidth, 0.4dB gain flatness (1–4GHz), OIP3 of +37.2dBm, shutdown capability, and compact 2mm × 3mm TDFN-8EP package with exposed thermal pad.

Technical Context

The MAX2473EUT+T employs a rugged bipolar Darlington architecture enabling +20dBm maximum input power handling without external protection circuitry. Its internally matched 50Ω input and output simplify PCB layout and eliminate external matching components across the full 40MHz–4000MHz band.

It features an enable/shutdown control pin (EN) that reduces supply current to 7µA in disabled state, supporting power-gated RF signal chains. The device maintains stable gain flatness (<0.4dB variation from 1–4GHz) and low noise figure (2.0–2.85dB) across temperature (–40°C to +85°C) and supply voltage (3V–5.25V) variations.

Key Specifications

Pinout & Package

The MAX2473EUT+T is housed in a lead-free, RoHS-compliant 8-pin TDFN-EP (2mm × 3mm) package with exposed thermal pad (EP) for enhanced thermal dissipation. θ_JA = 60°C/W on four-layer board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar broadband RF amplifier applications.

Compared with QPL9547TR13 and SKY65167-396LF, the MAX2473EUT+T uniquely balances +19.5dBm output, 0.4dB gain flatness, and enable control in a 2mm × 3mm footprint-making it optimal for space-constrained, power-aware cellular and microwave transmit chains.

Availability

MAX2473EUT+T is available at Aetrix Electronics and suitable for cellular infrastructure, microwave radio, wireless LAN, and test and measurement applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MAX2473EUT+T 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

Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for precision, power, and RF applications.

The MAX2612–MAX2616 family-including MAX2473EUT+T-is engineered for broadband RF signal conditioning in infrastructure and wireless systems, emphasizing linearity, thermal efficiency, and ease of integration.

FAQ

What is the operating frequency range of the MAX2473EUT+T?

The MAX2473EUT+T operates from 40MHz to 4000MHz. This full-range coverage is verified per the manufacturer's AC Electrical Characteristics table and typical gain vs. frequency plots. The device maintains specified gain, noise figure, and OIP3 performance across this band without external tuning, making it suitable for multiband LTE, WiMAX, and microwave IF applications. All data points in the datasheet confirm operation up to 4GHz-not just typical but guaranteed minimum/maximum limits.

Does the MAX2473EUT+T require external matching components?

No, the MAX2473EUT+T does not require external matching components. Its RFIN and RFOUT ports are internally matched to 50Ω across 40MHz–4000MHz, as confirmed in the General Description, Pin Description, and Typical Application Circuits sections. The recommended external components-0.01µF DC-blocking capacitors and 220nH RF choke-are for DC biasing and isolation, not impedance matching. This eliminates discrete matching networks and reduces layout sensitivity.

What is the shutdown current of the MAX2473EUT+T and how is it controlled?

The MAX2473EUT+T draws 7µA in shutdown mode when the EN pin is driven logic-low, as specified in the DC Electrical Characteristics table. The EN pin (Pin 4) is active-low and must be driven by a low-impedance source capable of sinking 10µA. In normal operation, EN is left unconnected (internally pulled up). This feature enables precise power gating in time-division duplex (TDD) or burst-mode RF systems without compromising startup time or stability.

Is the MAX2473EUT+T suitable for automotive applications?

The MAX2473EUT+T itself is not AEC-Q100 qualified; however, the pin-compatible MAX2473EUT/V+ variant is automotive-qualified. Per the Ordering Information table, only parts suffixed "/V+" meet AEC-Q100 Grade 3 (–40°C to +85°C) requirements. Engineers designing for automotive radar, V2X, or telematics should specify MAX2473EUT/V+ instead of MAX2473EUT+T to ensure qualification compliance, thermal derating, and failure-in-time (FIT) reporting.

What thermal management is required for the MAX2473EUT+T at full load?

The MAX2473EUT+T requires connection of its exposed pad (EP) to a PCB ground plane using a 3×3 array of thermal vias, as specified in the Pin Description. With θ_JA = 60°C/W on a four-layer board and maximum power dissipation of 1333.3mW, junction temperature rise is ~80°C above ambient at full load. To maintain T_J ≤ 125°C (derated from 150°C max), ambient must stay below +45°C-or additional copper area, airflow, or thermal interface material must be applied. The EP must be electrically and thermally tied to pins 1/3/6/8.