Analog Devices Inc./Maxim Integrated MAX4286ESA

Overview

MAX4286ESA from Maxim Integrated is a single-channel, high-speed voltage-feedback operational amplifier optimized as an ADC buffer driver. It operates from a +2.85V to +6.5V single supply, delivers 150MHz −3dB bandwidth at minimum gain of +5V/V, achieves 350V/µs slew rate and 88dBc SFDR at 5MHz, and features active-low disable for high-impedance output state in multiplexed ADC front-ends.

For engineers reviewing the MAX4286ESA datasheet, MAX4286ESA pinout, MAX4286ESA application, or MAX4286ESA equivalent, this page provides verified circuit role, package mapping (8-pin SO), disable timing (40ns enable / 50ns disable), output drive (−106mA / +77mA), and real-world ADC interface design context - all confirmed from Maxim's official datasheet Rev 0 (April 2000).

Technical Context

The MAX4286ESA is internally compensated for stable operation at closed-loop gains ≥+5V/V, distinguishing it from unity-gain-stable variants like MAX4285. Its voltage-feedback architecture supports fast settling (6ns to 0.1%) and low distortion across wide load ranges (100Ω–1kΩ), with input common-mode range extending to VEE (ground in single-supply mode).

It integrates a dedicated active-low DISABLE pin that reduces quiescent current to 1mA and raises output impedance to ~35kΩ when asserted - enabling clean signal routing in time-interleaved or channel-multiplexed ADC systems without external switches or isolation resistors.

Key Specifications

Pinout & Package

MAX4286ESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard JEDEC MO-153 footprint (5.0mm × 6.2mm, 1.27mm pitch). Pin 1 marked via notch or dot; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ADC buffer amplifier applications.

Compared with MAX4285ESA and AD8009ARZ, the MAX4286ESA uniquely balances gain-specific stability (+5V/V), integrated disable, and low-power operation - making it optimal for cost-sensitive, space-constrained, multiplexed ADC systems requiring deterministic channel isolation and minimal standby power.

Availability

MAX4286ESA is available at Aetrix Electronics and suitable for high-speed data acquisition, communications receiver front-ends, and ultrasound beamformer analog signal chains requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4286ESA 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 and mixed-signal ICs for industrial, communications, and medical applications.

The MAX4285–MAX4288 family was designed specifically as high-speed, low-distortion ADC buffer amplifiers - targeting demanding applications including communications infrastructure, portable instrumentation, and medical imaging where signal fidelity and power efficiency are co-critical.

FAQ

What is the minimum stable gain for MAX4286ESA?

The MAX4286ESA is internally compensated for stable operation at closed-loop gains of +5V/V or greater. It is not unity-gain stable; using it at gains below +5V/V may cause peaking or oscillation. For unity-gain or variable-gain applications, the MAX4285ESA is the appropriate alternative within the same family. The MAX4286ESA datasheet explicitly specifies "Min Gain = 5" in its ordering guide and AC characteristics tables.

Does MAX4286ESA support true rail-to-rail input?

Yes - the MAX4286ESA features an input common-mode voltage range that extends to VEE (ground in single-supply operation), allowing input signals down to 0V. However, the output swing is limited to VEE + 0.4V to VCC − 0.4V under load, so it is not rail-to-rail output. This input capability enables full utilization of the 0–3V input range in +3V-supply systems, critical for maximizing ADC dynamic range.

What is the typical output impedance of MAX4286ESA when disabled?

When the DISABLE pin is driven low, the MAX4286ESA places its output in a high-impedance state with a typical output impedance of 35kΩ. This value is specified in the Applications Information section of the datasheet and verified in typical operating characteristics plots (e.g., isolation resistance vs. load capacitance). It enables clean multiplexing without signal leakage between channels.

Can MAX4286ESA drive a 50Ω terminated ADC input?

Yes - the MAX4286ESA delivers ±106mA output current, enabling direct drive of 50Ω-terminated ADC inputs at full-scale 1V_pp signals. Its 350V/µs slew rate ensures transient response remains linear, and its 150MHz bandwidth preserves signal integrity through the 25MHz Nyquist zone. Layout best practices (short traces, proper grounding, local bypassing) are essential to maintain performance at these impedances.

Is there a SOT23-6 variant of MAX4286ESA?

Yes - the MAX4286EUT-T is the SOT23-6 packaged variant of the same device, sharing identical electrical specifications, gain stability, disable timing, and thermal performance. Both MAX4286ESA (8-pin SO) and MAX4286EUT-T (6-pin SOT23) operate across −40°C to +85°C and are pin-compatible in function (though physical pinout differs). The choice depends on board space constraints and thermal requirements.