Analog Devices Inc./Maxim Integrated MAX4451ESA

Overview

The MAX4451ESA from Maxim Integrated is a dual, unity-gain-stable, rail-to-rail output operational amplifier optimized for high-speed video and instrumentation signal conditioning. It delivers 210MHz -3dB bandwidth, 485V/µs slew rate, and 0.02%/0.08° differential gain/phase error while operating from a single +4.5V to +11V supply or dual ±2.25V to ±5.5V supplies - making it ideal for surveillance video systems and analog-to-digital converter interfaces.

For engineers reviewing the MAX4451ESA datasheet, MAX4451ESA pinout, MAX4451ESA application, or MAX4451ESA equivalent, key selection criteria include its 8-pin SO package compatibility, low 6.5mA per-amplifier quiescent current, rail-to-rail output swing within 55mV of both rails, and verified performance in 75Ω video line driving with <−65dBc SFDR at 5MHz.

Technical Context

The MAX4451ESA employs voltage-feedback architecture enhanced with current-feedback techniques to achieve wide bandwidth and fast transient response. Its input stage supports common-mode voltages extending beyond VEE (ground in single-supply mode) and up to 2.25V below VCC, enabling ground-sensing operation in low-voltage systems.

Each amplifier features local feedback around the output stage to maintain low open-loop output impedance (~1.5Ω), minimizing gain sensitivity to load variations. Channel-to-channel isolation exceeds 102dB at DC, ensuring minimal crosstalk in dual-channel video routing applications.

Key Specifications

Pinout & Package

The MAX4451ESA is housed in an 8-pin SO (Small Outline) package with 150-mil body width, RoHS-compliant, and rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH6702MA/NOPB and ADA4817-2ARZ, the MAX4451ESA uniquely balances 210MHz bandwidth, rail-to-rail output, 6.5mA efficiency, and broadcast-grade video linearity - making it the optimal choice for space-constrained, low-power video signal routing where output swing and differential fidelity are non-negotiable.

Availability

The MAX4451ESA is available at Aetrix Electronics and suitable for surveillance video systems, analog-to-digital converter interfaces, and set-top box designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX4451ESA 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, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX4451ESA belongs to Maxim's ultra-small, low-cost, high-speed op amp product line, engineered specifically for video signal conditioning, instrumentation, and low-voltage high-bandwidth analog interfaces where rail-to-rail output and ground-sensing inputs are essential.

FAQ

What is the maximum capacitive load the MAX4451ESA can drive without external isolation?

The MAX4451ESA is not designed to drive highly reactive loads directly. Without an external isolation resistor (typically 20Ω–30Ω), stability degrades significantly above ~5pF capacitive load, causing peaking and oscillation. For reliable operation into coaxial cables or PCB traces with >10pF capacitance, a series isolation resistor must be used - as validated in Figure 3 of the datasheet, where 27Ω supports up to 120pF load capacitance. The MAX4451ESA itself does not integrate internal isolation.

Does the MAX4451ESA support dual-supply operation, and what are the limits?

Yes, the MAX4451ESA supports dual-supply operation from ±2.25V to ±5.5V. Absolute maximum ratings allow up to ±5.5V (11V total), and electrical specifications are guaranteed across this full range. Input common-mode voltage extends beyond the negative rail (VEE − 0.2V) and up to VCC − 2.25V, enabling robust operation even with asymmetric supplies. The MAX4451ESA maintains 210MHz bandwidth and 485V/µs slew rate under ±5V conditions.

What is the typical output voltage swing of the MAX4451ESA on a +5V single supply?

On a +5V single supply (VEE = 0V), the MAX4451ESA delivers rail-to-rail output swing within 55mV of each rail - i.e., minimum VOL = 55mV and maximum VOH = 4.945V with a 2kΩ load. This yields >4.9V_P-P usable dynamic range, critical for maximizing SNR in video and ADC driver applications. Performance is confirmed in the "Output Voltage Swing" graph (MAX4450-13) and AC Electrical Characteristics table.

Can the MAX4451ESA be used in unity-gain stable configurations without external compensation?

Yes, the MAX4451ESA is internally compensated for unity-gain stability. When configured as a unity-gain buffer, it requires only a 24Ω resistor in series with the feedback path (as specified in Applications Information section) to optimize AC response and suppress parasitic LC resonance. No additional external capacitors or compensation networks are needed - the MAX4451ESA remains stable across all gains ≥1 with proper layout and bypassing.

How does the MAX4451ESA perform in video applications requiring NTSC compliance?

The MAX4451ESA meets NTSC broadcast requirements with measured differential gain error of 0.02% and differential phase error of 0.08° into 150Ω loads - values explicitly listed in the AC Electrical Characteristics table. These figures were validated using standard NTSC test waveforms and confirm suitability for professional and consumer video equipment including surveillance cameras, DVRs, and set-top boxes where color fidelity and timing accuracy are critical. The MAX4451ESA achieves this while consuming only 13mA total (6.5mA per channel) from a +5V supply.