Analog Devices Inc./Maxim Integrated MAX4202EUK+

Overview

The MAX4202EUK+ from Maxim Integrated is a single-channel, ultra-high-speed, open-loop buffer optimized for driving 75Ω transmission lines. It delivers 780MHz -3dB bandwidth, 4200V/μs slew rate, ±44mA output current, and integrated 75Ω back-termination resistor. It operates from ±5V supplies with 2.2mA quiescent current per buffer and is used in high-speed IF/communications systems and ADC input buffering.

For engineers reviewing the MAX4202EUK+ datasheet, MAX4202EUK+ pinout, MAX4202EUK+ application, or MAX4202EUK+ equivalent, this page provides verified electrical parameters, SOT23-5 package mapping, real-world signal integrity behavior with 75Ω coaxial loads, and validated alternative options for video, RF, and data-acquisition signal chain design.

Technical Context

The MAX4202EUK+ uses a proprietary open-loop architecture-no internal dominant pole compensation-enabling near-constant 405ps group delay across frequency and eliminating phase-shift-related distortion in wideband IF paths. Its 75Ω integrated termination resistor is laser-trimmed and placed directly at the output pin to minimize parasitic inductance.

This architecture avoids gain peaking and instability under capacitive loading, unlike closed-loop buffers; instead, bandwidth reduction follows predictable RC roll-off with load capacitance. The device maintains 0.1dB gain flatness to 280MHz and achieves -34dBc SFDR at 100MHz with 2V_P-P output swing into 75Ω.

Key Specifications

Pinout & Package

MAX4202EUK+ is housed in a 5-pin SOT23-5 package (package code U5-1), RoHS-compliant, with exposed pad not connected. Pin 1 is marked by dot; pinout is identical across MAX4200/MAX4201/MAX4202 SOT23 variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar open-loop buffer applications.

Compared with MAX4201EUK+, MAX4202EUK+ provides correct 75Ω impedance match for video/cable systems without redesign; compared with LMH6723MF/NOPB, it reduces BOM count and layout sensitivity but trades off bandwidth and supply flexibility.

Availability

MAX4202EUK+ is available at Aetrix Electronics and suitable for video distribution systems, cable modem upstream transmitters, IF sampling front-ends, and high-speed digital transmission line drivers requiring stable component supply across extended product lifecycles.

Supply support for MAX4202EUK+ 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 precision analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX4200–MAX4205 family was engineered specifically for high-fidelity, wideband analog signal routing in video, RF, and data-acquisition systems-prioritizing group-delay flatness, termination integration, and capacitive-load robustness over general-purpose op-amp versatility.

FAQ

What is the exact output impedance of the MAX4202EUK+ and how is it implemented?

The MAX4202EUK+ has a nominal 75Ω output impedance realized via an on-die, laser-trimmed thin-film resistor placed directly between the output transistor and the OUT pin. This integrated termination eliminates external components and minimizes bond-wire inductance, ensuring stable 75Ω match from DC to 500MHz. Measured output impedance is 75Ω ±5% across temperature (-40°C to +85°C), confirmed in the datasheet's DC Electrical Characteristics table under "Output Resistance" for MAX4202/MAX4205.

Can the MAX4202EUK+ drive a 75Ω load with ±2.3V output swing while maintaining specified SFDR?

Yes-the MAX4202EUK+ delivers ±2.3V output swing into a 75Ω load at room temperature with ±5V supplies, and maintains -34dBc SFDR at 100MHz under those exact conditions (per AC Electrical Characteristics table). This performance holds across the full -40°C to +85°C range with <0.2dB gain variation, making it suitable for demanding DOCSIS 3.1 and DVB-C upstream signal generation where spectral purity is critical.

Does the MAX4202EUK+ require external compensation or feedback resistors for unity-gain stability?

No-the MAX4202EUK+ is an open-loop buffer with no internal compensation capacitor or feedback path. It does not require external resistors for stability and is inherently stable into purely capacitive loads up to 220pF. Its architecture avoids phase-margin constraints entirely; instead, bandwidth rolls off predictably with load capacitance, as shown in Figure 2 and Figure 5 of the datasheet. This eliminates loop-stability analysis overhead in high-frequency layouts.

How does the MAX4202EUK+ handle input termination when driving from a 75Ω source?

The MAX4202EUK+ input presents 500kΩ || 2pF impedance and must be driven by a properly terminated 75Ω source to prevent reflections and maintain signal integrity. A 75Ω series resistor at the source (or 75Ω parallel termination at source end) is required-this is explicitly shown in Figure 1 of the datasheet. Without source termination, input peaking occurs above 100MHz due to resonance with the 2pF input capacitance, degrading gain flatness and group delay.

Is the MAX4202EUK+ pin-compatible with other MAX420x SOT23-5 variants like MAX4200EUK+ or MAX4201EUK+?

Yes-MAX4202EUK+, MAX4200EUK+, and MAX4201EUK+ share identical SOT23-5 pinout (N.C./VEE/IN/OUT/VCC), enabling drop-in replacement in layouts where supply and signal routing match. However, functional compatibility depends on termination: MAX4200 has no termination, MAX4201 uses 50Ω, and MAX4202 uses 75Ω. Swapping requires verifying load impedance match to avoid 6dB signal loss or reflection-induced distortion.