Analog Devices Inc./Maxim Integrated MAX2752EUA+T

Overview

MAX2752EUA+T from Maxim Integrated is a monolithic voltage-controlled oscillator (VCO) designed for 2.025GHz–2.165GHz ISM-band RF systems. It integrates on-chip LC tank, tuning varactor, and 50Ω-matched output buffer, operates from +2.7V to +5.5V, draws 12.8–15.2mA typical supply current, and delivers –3dBm output power with <4MHz_p-p load pulling-used in Bluetooth and proprietary 2.4GHz radios.

For engineers reviewing the MAX2752EUA+T datasheet, MAX2752EUA+T pinout, MAX2752EUA+T application, or MAX2752EUA+T equivalent, key selection criteria include guaranteed 2025–2165MHz tuning range, integrated 50Ω output matching, sub-1µA shutdown current, low tuning input current (<0.02nA), and µMAX-8 package compatibility with high-density RF layouts.

Technical Context

The MAX2752EUA+T implements a fully differential LC oscillator core with on-die inductor and varactor, eliminating external tank components. Its TUNE pin accepts 0.4V–2.4V analog control voltage, delivering factory-trimmed frequency limits across temperature.

A dedicated output buffer stage-powered by VCC2 and grounded via separate GND pin-provides 50Ω matched output with internal DC blocking, enabling direct connection to mixers or synthesizers without external matching or coupling capacitors.

Key Specifications

Pinout & Package

The MAX2752EUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), RoHS-compliant, with exposed pad for thermal dissipation and optimized RF grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX2750EUA+T and MAX2751EUA+T, the MAX2752EUA+T provides optimal frequency alignment for 335–375MHz IF receivers in 2.4GHz proprietary radios, with identical power management, package, and layout footprint-enabling family-based platform design across adjacent bands.

Availability

MAX2752EUA+T is available at Aetrix Electronics and suitable for Bluetooth transceivers, proprietary 2.4GHz radios, HomeRF base stations, and ISM-band sensor nodes requiring stable component supply, consistent parametric performance, and long-term production availability.

Supply support for MAX2752EUA+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for communications, computing, and industrial applications.

The MAX2750/MAX2751/MAX2752 product line delivers fully integrated, easy-to-use VCOs for 2.0–2.5GHz ISM-band radios-designed to replace discrete VCO modules with monolithic solutions that reduce design risk and accelerate time-to-market.

FAQ

What is the guaranteed frequency tuning range of the MAX2752EUA+T?

The MAX2752EUA+T has a factory-guaranteed oscillator frequency range of 2025MHz to 2165MHz across the full operating temperature range (–40°C to +85°C) with a 0.4V to 2.4V tuning voltage applied to the TUNE pin. This range supports 335MHz to 375MHz IF architectures and is verified per production test limits-not typical or nominal only.

Does the MAX2752EUA+T require external matching components at the OUT pin?

No, the MAX2752EUA+T does not require external matching components at the OUT pin. Its output buffer is internally matched to 50Ω and includes an on-chip DC blocking capacitor. This allows direct connection to 50Ω loads such as RF mixers or synthesizers without external baluns, matching networks, or coupling capacitors-reducing bill-of-materials and layout complexity.

How does the dual-supply architecture (VCC1 and VCC2) improve RF performance in the MAX2752EUA+T?

The MAX2752EUA+T uses separate VCC1 (oscillator core) and VCC2 (output buffer) supplies to isolate high-frequency switching noise generated by the buffer from the sensitive oscillator core. This separation, combined with independent bypassing (220pF each), reduces supply-induced phase noise and minimizes load-pulling effects-key for maintaining spectral purity and frequency stability in demanding 2.4GHz radio applications.

What is the shutdown current specification for the MAX2752EUA+T, and how is it controlled?

The MAX2752EUA+T achieves a shutdown supply current of less than 1µA when the SHDN pin is driven to a logic-low level (≤0.6V). The SHDN input is high-impedance, requiring no external pull-up resistor. In shutdown mode, both oscillator core and output buffer are disabled, enabling ultra-low-power operation ideal for battery-powered sensor nodes and time-division systems.

Can the MAX2752EUA+T be used interchangeably with MAX2750EUA+T or MAX2751EUA+T on the same PCB layout?

No-the MAX2752EUA+T is not interchangeable with MAX2750EUA+T or MAX2751EUA+T without system-level redesign. Although all three share identical µMAX-8 pinout and package, their guaranteed frequency ranges differ significantly (2025–2165MHz vs. 2400–2500MHz vs. 2120–2260MHz), requiring corresponding changes to PLL loop filters, mixer IF stages, and frequency planning. Pin compatibility does not imply functional or system-level drop-in replacement.