Analog Devices Inc./Maxim Integrated MAX4385EEUK+T

Overview

MAX4385EEUK+T from Maxim Integrated is a single-channel, rail-to-rail output voltage-feedback operational amplifier optimized for high-speed video line driving. It delivers 230MHz -3dB bandwidth, 450V/µs slew rate, ±15kV HBM ESD protection, and operates from a single 5V supply with input common-mode range extending beyond VEE. It is used in surveillance video systems and set-top box video output stages where robustness against external ESD events and wide dynamic range are critical.

For engineers reviewing the MAX4385EEUK+T datasheet, MAX4385EEUK+T pinout, MAX4385EEUK+T application, or MAX4385EEUK+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options for video signal conditioning and line driving circuits.

Technical Context

The MAX4385EEUK+T employs a hybrid voltage-feedback architecture with current-feedback techniques to achieve high slew rate and wide bandwidth while maintaining unity-gain stability. Its input stage supports common-mode voltages down to VEE − 200mV and up to VCC − 2.25V, enabling ground-sensing operation in single-supply systems.

Output stage design enables rail-to-rail swing within 50mV of each rail under 2kΩ load, with low open-loop output impedance (8Ω) and 50mA sourcing/sinking capability. ESD protection circuitry is integrated on all pins per IEC 1000-4-2 (±15kV air-gap, ±8kV contact) and Human Body Model (±15kV), eliminating need for external TVS diodes in exposed video interfaces.

Key Specifications

Pinout & Package

MAX4385EEUK+T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, with gull-wing leads and 0.95mm pitch. Thermal pad is not present; power dissipation is managed via PCB copper area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed video op amp applications.

Compared with THS3201DR and LMH6702MF/NOPB, the MAX4385EEUK+T uniquely combines 230MHz bandwidth, ±15kV system-level ESD robustness, rail-to-rail output, and 5.5mA quiescent current-making it the only option that satisfies both performance and ruggedness requirements in consumer-facing video interfaces without added protection components.

Availability

MAX4385EEUK+T is available at Aetrix Electronics and suitable for surveillance video systems, set-top box designs, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX4385EEUK+T 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 consumer applications.

The MAX4385E/MAX4386E product line was designed specifically for high-fidelity, ESD-hardened video signal conditioning in cost-sensitive consumer and security electronics-emphasizing bandwidth, distortion performance, and system-level robustness over general-purpose op amp attributes.

FAQ

What is the maximum capacitive load the MAX4385EEUK+T can drive without oscillation?

The MAX4385EEUK+T is not optimized for direct capacitive loads. Driving >10pF without isolation causes peaking and instability. A series isolation resistor (10–15Ω) must be placed between the output and load capacitance. For example, with 68pF load, a 15Ω resistor restores flat frequency response. This requirement is documented in Figures 2–5 of the MAX4385EEUK+T datasheet and applies regardless of PCB stackup or trace length.

Does the MAX4385EEUK+T support dual-supply operation?

Yes, the MAX4385EEUK+T supports dual-supply operation with VCC and VEE pins. Absolute maximum ratings allow VCC to VEE voltage up to 6V, and operating range is specified from −0.3V to +6V. In dual-supply mode, VEE may be set to −2.5V and VCC to +2.5V for symmetric ±2.5V operation, maintaining full rail-to-rail output swing and input common-mode range extending 200mV beyond each rail.

What is the typical harmonic distortion performance of the MAX4385EEUK+T at 5MHz?

At 5MHz with 2V_P-P output, the MAX4385EEUK+T achieves −60dBc spurious-free dynamic range (SFDR), −70dBc 2nd harmonic distortion, −60dBc 3rd harmonic distortion, and −58dB total harmonic distortion (THD). These values are measured under standard conditions (VCC = 5V, RL = 100Ω, AVCL = 1V/V) and reflect its suitability for broadcast-grade video signal paths where harmonic artifacts degrade color fidelity.

Can the MAX4385EEUK+T be used in a noninverting gain-of-5 configuration?

Yes, the MAX4385EEUK+T supports noninverting gains up to 10. For gain-of-5, use RF = 4kΩ and RG = 1kΩ. However, resistor values must be kept low (≤1kΩ) to avoid bandwidth degradation from interaction with 8pF input capacitance. Layout must minimize stray capacitance at IN+ and IN− nodes; microstrip routing and ground plane isolation are recommended per Maxim's layout guidelines in the MAX4385EEUK+T datasheet.

Is the MAX4385EEUK+T pin-compatible with other SOT23-5 op amps like the MAX44260 or OPA355?

No, the MAX4385EEUK+T has a unique pinout: Pin 1 = OUT, Pin 2 = VEE, Pin 3 = IN+, Pin 4 = IN−, Pin 5 = VCC. This differs from industry-standard SOT23-5 op amps (e.g., OPA355: Pin 1 = NC, Pin 2 = IN−, Pin 3 = IN+, Pin 4 = VEE, Pin 5 = VCC). Direct replacement would require PCB redesign. Always verify pin mapping using the "Pin Configurations" section of the MAX4385EEUK+T datasheet before substitution.