Analog Devices Inc./Maxim Integrated MAX4226ESD

Overview

MAX4226ESD from Maxim Integrated is a dual-channel, low-power, current-feedback amplifier optimized for closed-loop gain ≥ +1 (0dB), delivering 1GHz -3dB bandwidth, 1100V/µs slew rate, and 0.01%/0.02° differential gain/phase error. It operates from ±2.85V to ±5.5V dual supplies, draws 6mA quiescent current per amplifier, and supports video line driving and ADC input buffering in professional broadcast systems.

For engineers reviewing the MAX4226ESD datasheet, MAX4226ESD pinout, MAX4226ESD application, or MAX4226ESD equivalent, key selection criteria include its unity-gain stability, shutdown-enabled multiplexing capability (350µA supply current, 100kΩ output impedance), 80mA output drive into 75Ω back-terminated loads, and SOT23-6 package compatibility with space-constrained high-speed analog designs.

Technical Context

The MAX4226ESD implements a current-feedback topology with transimpedance open-loop transfer function, enabling gain-bandwidth independence at low gains and supporting stable operation at closed-loop gains of +1V/V or higher. Its internal architecture features matched input resistances (700kΩ noninverting, 45kΩ inverting) and low input bias current (±2µA typical).

It integrates dual independent amplifiers sharing a common shutdown control (SHDN), each with TTL-compatible logic inputs, 100kΩ shutdown output impedance, and fast turn-on/off times (2ns tON, 300ns tOFF). The device maintains 0.1dB gain flatness to 300MHz and −60dBc THD at 10MHz under 150Ω load conditions.

Key Specifications

Pinout & Package

MAX4226ESD is housed in a 6-pin SOT23 package with exposed pad (ESD-rated), footprint-compatible with industry-standard SOT23-6 layouts. Pin 1 is VEE (negative supply), Pin 2 is IN− (inverting input), Pin 3 is IN+ (noninverting input), Pin 4 is SHDN (shutdown control), Pin 5 is OUT (output), and Pin 6 is VCC (positive supply). No NC pins are present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-feedback amplifier applications.

Compared with MAX4225ESA and THS3201DGN, the MAX4226ESD uniquely combines 1GHz bandwidth, integrated shutdown, SOT23-6 footprint, and broadcast-grade video specifications-making it optimal for compact, power-aware, multi-channel video signal routing where pin count and thermal density are constrained.

Availability

MAX4226ESD is available at Aetrix Electronics and suitable for professional video equipment, high-speed data acquisition systems, and RF receiver front-ends requiring stable component supply, guaranteed ESD robustness, and production-ready SOT23 packaging.

Supply support for MAX4226ESD 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 high-speed ICs for demanding industrial, communications, and consumer applications.

The MAX4223–MAX4228 family was engineered specifically for ultra-high-speed video signal conditioning and ADC driving, emphasizing unity-gain stability, low distortion, and low-power shutdown in miniature packages-targeting broadcast, medical imaging, and test equipment markets.

FAQ

What is the operating supply voltage range for MAX4226ESD?

The MAX4226ESD operates from dual supplies ranging from ±2.85V to ±5.5V. This corresponds to a total supply voltage range of 5.7V to 11V. Operation outside this range violates Absolute Maximum Ratings and may cause permanent damage. The device is specified over the full −40°C to +85°C temperature range under these supply conditions, and its 6mA quiescent current per amplifier remains stable across the voltage span.

Does MAX4226ESD support unity-gain configuration without external compensation?

Yes, MAX4226ESD is internally compensated for stable operation at closed-loop gains of +1 (0dB) or greater. Its current-feedback architecture eliminates the need for external compensation networks in unity-gain buffers. Data sheet Figures 1 and MAX4223-01 confirm stable small-signal gain response up to 1GHz with AV = +1, RF = 560Ω, and no peaking-validating inherent unity-gain stability for video line driver and ADC buffer use cases.

How does the shutdown feature of MAX4226ESD function electrically?

When the SHDN pin is driven low (≤0.8V), MAX4226ESD reduces quiescent supply current to 350µA per amplifier and places the output into a high-impedance state (100kΩ typical). The output remains at high-Z until SHDN returns to ≥2.0V. This behavior is verified in AC Electrical Characteristics Table (tON = 2ns, tOFF = 300ns) and supports analog multiplexing by allowing multiple MAX4226ESD outputs to share a common bus without loading.

What is the maximum output current capability of MAX4226ESD?

MAX4226ESD delivers a minimum output current of 60mA and a typical value of 80mA into ±2.5V output swing. It is characterized to drive up to four back-terminated 75Ω video loads simultaneously while maintaining differential gain/phase error ≤0.01%/0.02°. Short-circuit output current is 140mA (typical), and the device includes thermal shutdown protection to prevent damage during sustained overload conditions.

Is MAX4226ESD pin-compatible with other devices in the MAX4223–MAX4228 family?

MAX4226ESD shares the same 6-pin SOT23 pinout as MAX4223EUT-T and MAX4224EUT-T, with identical VEE, IN−, IN+, SHDN, OUT, and VCC assignments. However, MAX4226ESD is gain-optimized for +1V/V (like MAX4223/MAX4225), whereas MAX4224/MAX4227/MAX4228 are +2V/V optimized. Electrical pin functions match, but bandwidth and stability profiles differ-requiring verification of feedback network values per Table 1 in the datasheet.