Analog Devices Inc./Maxim Integrated MAX4450EXK

Overview

MAX4450EXK from Maxim Integrated is a single, 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 +4.5V to +11V single supply. Its ultra-small SC70-5 package and 55mV rail-to-rail output swing make it ideal for space-constrained video line drivers and ADC interface circuits.

For engineers reviewing the MAX4450EXK datasheet, MAX4450EXK pinout, MAX4450EXK application, or MAX4450EXK equivalent, key selection criteria include its 210MHz small-signal bandwidth, 55MHz 0.1dB gain flatness, low 6.5mA quiescent current per amplifier, rail-to-rail output capability, and input common-mode range extending beyond ground in single-supply configurations.

Technical Context

The MAX4450EXK employs voltage-feedback architecture enhanced with current-feedback techniques to achieve high slew rate and wide bandwidth without sacrificing stability at unity gain. Its input stage supports common-mode voltages down to VEE − 200mV (i.e., below ground in single-supply use) and up to VCC − 2.25V, enabling true ground-sensing operation.

Internally compensated for unity-gain stability, the device requires only a 24Ω feedback resistor in unity-gain configuration to suppress parasitic LC resonance. Output impedance is minimized via local feedback, ensuring consistent gain across varying resistive loads up to 2kΩ, and it maintains <0.5% differential gain error and <0.1° phase error under NTSC video conditions with 150Ω load.

Key Specifications

Pinout & Package

The MAX4450EXK is housed in a 5-pin SC70 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.9mm, with moisture sensitivity level (MSL) 1 and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, rail-to-rail output op amp applications.

Compared with LMH6629MA/NOPB and ADA4891-1ARJZ-R7, the MAX4450EXK uniquely combines 210MHz bandwidth, 485V/µs slew rate, 0.02%/0.08° video linearity, and 6.5mA supply current in an SC70-5 package-making it the only option validated for broadcast-grade video line driving within strict power and size constraints.

Availability

MAX4450EXK is available at Aetrix Electronics and suitable for surveillance video systems, digital cameras, and analog-to-digital converter interface circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4450EXK 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 power management ICs for demanding industrial, communications, and consumer applications.

The MAX4450EXK belongs to Maxim's high-speed video op amp product line, engineered specifically for low-distortion, rail-to-rail signal conditioning in space- and power-constrained video signal chains.

FAQ

What is the maximum capacitive load the MAX4450EXK can drive directly without instability?

The MAX4450EXK is not designed to drive capacitive loads directly. Loads exceeding 10pF require an isolation resistor (typically 20Ω–30Ω) placed between the output and capacitance to maintain phase margin. Figure 3 in the datasheet shows optimal R_ISO values versus C_L; for example, a 68pF load requires ~27Ω. Driving >100pF without isolation causes peaking and potential oscillation, as shown in Figure 4.

Does the MAX4450EXK support dual-supply operation, and what are the limits?

Yes, the MAX4450EXK supports dual-supply operation from ±2.25V to ±5.5V. Absolute maximum ratings allow ±5.5V (11V total), and electrical specifications are guaranteed across this full range. When using dual supplies, both VCC and VEE must be bypassed with 0.1µF capacitors placed close to their respective pins to ensure stability and noise immunity.

What is the input common-mode voltage range for the MAX4450EXK when operated on a +5V single supply?

With VEE = 0V and VCC = +5V, the MAX4450EXK input common-mode voltage range extends from −0.2V to +2.75V (i.e., 200mV below ground to 2.25V below VCC). This ground-sensing capability allows direct interfacing with ground-referenced sources such as DAC outputs or sensor bridges without level-shifting circuitry.

Can the MAX4450EXK be used in a noninverting gain-of-5 configuration, and what resistor values are recommended?

Yes. For noninverting gain-of-5, Table 1 recommends RF = 49.9Ω and RG = 12.4Ω (or nearest E96 value), yielding a small-signal bandwidth of ~500MHz. However, layout parasitics become critical: keep RF and RG traces short and symmetric, use surface-mount resistors, and avoid vias near the feedback node. At 5× gain, the large-signal bandwidth drops to ~175MHz (BW_LS), sufficient for most video applications.

Is the MAX4450EXK pin-compatible with other op amps in the MAX445x family, such as the MAX4451?

No. The MAX4450EXK is a single-channel device in 5-pin SC70, while the MAX4451 is a dual-channel device in 8-pin SOT23 or SO packages. Their pinouts differ fundamentally: MAX4450EXK uses pins 1–5 for IN−, IN+, VEE, VCC, OUT; MAX4451 dedicates separate pins for two independent amplifiers (e.g., IN−A, IN+A, VEE, VCC, OUTA, IN−B, IN+B, OUTB). No PCB redesign allows direct substitution.