Analog Devices Inc./Maxim Integrated MAX4202ESA+

Overview

MAX4202ESA+ from Maxim Integrated is a single-channel, ultra-high-speed, open-loop buffer optimized for driving 75Ω coaxial transmission lines in IF/communications systems. It delivers 780MHz -3dB bandwidth, 280MHz 0.1dB gain flatness, 4200V/μs slew rate, and ±44mA output current into 75Ω loads, with integrated 75Ω back-termination resistor. Its low 2.1nV/√Hz voltage-noise density and ±5V dual-supply operation make it ideal for high-speed ADC input buffering in broadcast video and cable infrastructure.

For engineers reviewing the MAX4202ESA+ datasheet, MAX4202ESA+ pinout, MAX4202ESA+ application, or MAX4202ESA+ equivalent, key selection criteria include its fixed 75Ω output termination, open-loop gain of 0.41–0.59 V/V (dependent on load), 405ps group delay stability, and SO-8 package compatibility with RF layout best practices for 75Ω impedance control.

Technical Context

The MAX4202ESA+ employs a proprietary open-loop architecture eliminating dominant-pole compensation, enabling near-constant 405ps group delay across its full 780MHz bandwidth. Unlike closed-loop amplifiers, it avoids phase-shift-induced instability with capacitive loads while maintaining stable operation up to 220pF without oscillation.

Its integrated 75Ω termination resistor forms a precision voltage divider with the 75Ω load, delivering predictable signal amplitude at the receiver end and eliminating external components in back-terminated coaxial driver configurations. The device's 2.1nV/√Hz input voltage noise and 0.8pA/√Hz current noise support high dynamic range signal conditioning prior to ADC sampling.

Key Specifications

Pinout & Package

MAX4202ESA+ is housed in an 8-pin SOIC (SO-8) package with exposed pad for thermal enhancement, compatible with standard surface-mount reflow profiles and RF board stackups requiring controlled 75Ω microstrip routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4201ESA+, MAX4202ESA+ provides correct 75Ω termination for broadcast infrastructure but trades off 50Ω compatibility; versus LMH6723MA/NOPB, it offers plug-and-play 75Ω integration at the cost of lower bandwidth and fixed gain scaling.

Availability

MAX4202ESA+ is available at Aetrix Electronics and suitable for broadcast video distribution, cable modem IF amplification, and high-speed ADC input buffering requiring stable component supply across extended production lifecycles.

Supply support for MAX4202ESA+ 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 RF ICs for demanding industrial, communications, and consumer applications.

The MAX4200–MAX4205 family was engineered specifically for ultra-high-speed, low-noise, open-loop buffering in 50Ω and 75Ω transmission-line environments-targeting broadcast video, cable infrastructure, and IF signal chain applications.

FAQ

What is the exact output termination resistance of the MAX4202ESA+?

The MAX4202ESA+ integrates a precise 75Ω output termination resistor, confirmed in the datasheet's "Selector Guide" and "Detailed Description" sections. This value is factory-trimmed and guaranteed across temperature (-40°C to +85°C), enabling direct drive of 75Ω coaxial cables without external components. The MAX4202ESA+'s output stage is designed exclusively for 75Ω back-termination-unlike the MAX4201ESA+ (50Ω) or MAX4200ESA+ (no termination).

Does the MAX4202ESA+ require external compensation or feedback resistors?

No, the MAX4202ESA+ operates in open-loop configuration with no external feedback required. Its architecture eliminates the need for compensation capacitors or gain-setting resistors. The device's fixed 0.41–0.59 V/V gain is determined solely by the internal 75Ω termination and load impedance, as specified in the "DC Electrical Characteristics" table. This simplifies layout and improves high-frequency stability compared to closed-loop alternatives.

Can the MAX4202ESA+ drive capacitive loads without oscillation?

Yes, the MAX4202ESA+ remains stable with capacitive loads up to 220pF without oscillation, as verified in the "Output Capacitive Loading and Stability" section. Its open-loop design avoids phase-shift-induced positive feedback, unlike closed-loop buffers. However, bandwidth rolls off due to RC filtering (75Ω × C_L), so for >100pF loads, a series isolation resistor may be added to damp peaking-though the integrated 75Ω termination already provides inherent damping for typical 75Ω cable scenarios.

What is the guaranteed operating temperature range for the MAX4202ESA+?

The MAX4202ESA+ is fully specified and guaranteed over the industrial temperature range of -40°C to +85°C, as stated in the "Absolute Maximum Ratings" and "DC Electrical Characteristics" tables. All key parameters-including bandwidth, slew rate, noise density, and output drive-are tested and binned across this range. The SO-8 package (ESA suffix) is rated for continuous operation at +85°C ambient with appropriate PCB copper pour for thermal dissipation.

How does the MAX4202ESA+ achieve constant group delay?

The MAX4202ESA+ achieves a near-constant 405ps group delay by omitting the dominant-pole compensation found in conventional voltage-feedback amplifiers. Its proprietary open-loop architecture avoids frequency-dependent phase shift, resulting in linear phase response across its entire 780MHz bandwidth. This is measured and plotted in the "Typical Operating Characteristics" section (Figure MAX4200/25-07), confirming <±10ps variation from 100kHz to 1GHz-enabling distortion-free composite video and multi-carrier QAM signal transmission.