Analog Devices Inc./Maxim Integrated MAX4200ESA+

Overview

The MAX4200ESA+ from Maxim Integrated is a single-channel, ultra-high-speed, open-loop buffer IC designed for high-fidelity signal conditioning in RF and IF signal paths. It delivers 660MHz -3dB bandwidth, 4200V/μs slew rate, ±90mA output drive, and 2.1nV/√Hz input voltage-noise density, operating from ±5V supplies with only 2.2mA quiescent current per buffer. It is used to drive high-speed ADC inputs and coaxial transmission lines in precision data-acquisition systems.

For engineers reviewing the MAX4200ESA+ datasheet, MAX4200ESA+ pinout, MAX4200ESA+ application, or MAX4200ESA+ equivalent, key selection considerations include its open-loop architecture, absence of internal termination resistors, SOT23-5 and SO-8 package options, 660MHz bandwidth at unity gain, and suitability for low-noise, high-slew-rate analog front-end buffering where feedback stability constraints limit closed-loop alternatives.

Technical Context

The MAX4200ESA+ employs a proprietary open-loop architecture that eliminates dominant-pole compensation, enabling near-constant 405ps group delay across frequency and avoiding phase-shift-induced instability under capacitive loading. Its gain is slightly less than +1V/V (0.9–1.1 V/V), making it inherently stable without external compensation networks.

This architecture directly supports high-speed pulse fidelity-12ns settling to 0.1%, 220MHz 0.1dB gain flatness-and enables robust driving of reactive loads up to 220pF without oscillation, unlike conventional voltage-feedback amplifiers. The device's 500kΩ || 2pF input impedance and 8Ω output resistance are fixed by topology, not loop gain.

Key Specifications

Pinout & Package

MAX4200ESA+ is available in 8-pin SOIC (SO-8) package, with exposed pad for thermal enhancement. Pin 1 is marked with a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4201ESA+, the MAX4200ESA+ offers higher output voltage swing and no fixed termination-ideal for variable-impedance interfaces. Compared with LMH6723MA/NOPB, it eliminates stability risk from layout parasitics but sacrifices programmable gain and DC accuracy.

Availability

MAX4200ESA+ is available at Aetrix Electronics and suitable for high-speed data acquisition, IF signal processing, and precision analog front-end design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX4200ESA+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX4200–MAX4205 family was engineered specifically for open-loop, ultra-wideband buffering in RF/IF signal chains-prioritizing speed, noise, and capacitive-load resilience over DC precision or programmable gain.

FAQ

What is the maximum capacitive load the MAX4200ESA+ can drive without oscillation?

The MAX4200ESA+ remains stable with capacitive loads up to 220pF without oscillation, as confirmed in the datasheet's Typical Operating Characteristics (Figure 2). This stability arises from its open-loop architecture-unlike closed-loop amplifiers, it lacks feedback paths vulnerable to phase shift from load capacitance. For optimal flatness above 100MHz, an external 10Ω isolation resistor is recommended when driving >47pF.

Does the MAX4200ESA+ have internal termination resistors?

No, the MAX4200ESA+ has no internal termination resistors. Unlike the MAX4201ESA+ (50Ω) or MAX4202ESA+ (75Ω), the MAX4200ESA+ provides a high-output-current, open-loop buffer with fully configurable external termination. This allows designers to select optimal load matching (e.g., 150Ω for video, 50Ω for RF) without sacrificing output voltage swing or adding unnecessary series resistance.

What is the typical output voltage swing of the MAX4200ESA+ into a 150Ω load?

The MAX4200ESA+ delivers a typical output voltage swing of ±3.3V into a 150Ω load at ±5V supplies, as specified in the DC Electrical Characteristics table (V_OUT, RL = 150Ω). This swing supports high dynamic range in ADC driver applications and maintains signal integrity across long coaxial runs where insertion loss must be overcome without clipping.

Can the MAX4200ESA+ be used with single-supply operation?

No-the MAX4200ESA+ is specified only for dual ±4V to ±5.5V operation. Its input common-mode range and output swing are centered around ground, and the datasheet does not characterize performance under single-supply conditions. Attempting single-supply use risks violating absolute maximum ratings on pin-to-ground voltage and will degrade distortion, noise, and bandwidth performance.

How does the MAX4200ESA+ achieve constant group delay?

The MAX4200ESA+ achieves a near-constant 405ps group delay by eliminating the dominant-pole compensation found in conventional op amps. Its open-loop architecture avoids the phase shift associated with feedback-loop stabilization, resulting in linear phase response across its entire 660MHz bandwidth. This is verified in Figure 5 of the datasheet and makes the MAX4200ESA+ especially valuable in pulse and modulated-signal applications where timing skew must be minimized.