Analog Devices Inc./Maxim Integrated MAX4454EUD+

Overview

MAX4454EUD+ from Maxim Integrated is a quad, unity-gain stable, rail-to-rail output operational amplifier optimized for low-power, high-speed signal conditioning in single-supply systems. It delivers 200MHz -3dB bandwidth, 95V/µs slew rate, and consumes only 620µA per amplifier across +2.7V to +5.25V operation - enabling wide dynamic range in battery-powered RF front-ends and portable instrumentation.

For engineers reviewing the MAX4454EUD+ datasheet, MAX4454EUD+ pinout, MAX4454EUD+ application, or MAX4454EUD+ equivalent, key selection criteria include its unity-gain stability, 14-pin TSSOP package footprint, rail-to-rail output swing (within 180mV of rails), low input offset voltage (0.4mV typ), and suitability for ADC buffering, active filtering, and baseband signal chains where power efficiency and bandwidth coexist.

Technical Context

The MAX4454EUD+ employs a bipolar voltage-feedback architecture with internal compensation for unity-gain stability. Its rail-to-rail output stage uses demand-driven current biasing to maintain low open-loop output impedance (<0.8Ω at 1MHz) and minimize gain sensitivity to load variations.

Input common-mode range extends from VEE − 0.1V to VCC − 1.5V, supporting ground-sensing operation. The device is not optimized for highly capacitive loads (>22pF); stability under reactive loading requires external isolation resistors per Figure 1 in the datasheet.

Key Specifications

Pinout & Package

The MAX4454EUD+ is housed in a 14-pin TSSOP package (4.4mm × 5mm body, 0.65mm pitch), optimized for space-constrained PCB layouts while maintaining thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4454ESD+, the MAX4454EUD+ saves 30% board area in dense layouts; versus ADA4891-4ARUZ, it enables true unity-gain buffers but trades 10% bandwidth for 93% lower quiescent current - critical for always-on sensing nodes.

Availability

MAX4454EUD+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, cellular baseband signal chains, and keyless entry systems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MAX4454EUD+ 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 industrial, communications, and consumer applications.

The MAX445x family targets portable, low-voltage systems needing high bandwidth without sacrificing power efficiency - specifically engineered for ADC driving, active filtering, and RF/IF signal conditioning where rail-to-rail swing and unity-gain stability are mandatory.

FAQ

What is the maximum capacitive load the MAX4454EUD+ can drive without external compensation?

The MAX4454EUD+ is specified to drive up to 22pF directly while maintaining stability. Driving larger capacitive loads (e.g., ADC input capacitance plus PCB trace capacitance) requires an external isolation resistor (RISO) placed in series with the output - values are determined by the load capacitance per Figure 2 in the datasheet. For example, a 100pF load requires ~22Ω RISO. Failure to add RISO risks ringing or oscillation.

Does the MAX4454EUD+ support true single-supply operation with input voltages down to ground?

Yes. The MAX4454EUD+ features a ground-sensing input stage with common-mode range extending to VEE − 0.1V (i.e., −0.1V when VEE = 0V). This allows inputs to swing to ground or slightly below in single-supply configurations. However, output swing remains rail-to-rail (within 180mV of VCC/VEE), ensuring full dynamic range utilization when paired with 3.3V or 5V ADCs.

Can the MAX4454EUD+ be used in a unity-gain inverting configuration?

No - the MAX4454EUD+ is unity-gain stable only in noninverting configurations (gain ≥ +1V/V). Inverting configurations require minimum closed-loop gain of +2V/V for stability. For unity-gain inverting applications, consider adding a small series resistor (e.g., 24Ω) in the feedback path per Application Note 4172, but verify phase margin with simulation or bench testing.

What is the typical power-up settling time for the MAX4454EUD+?

The MAX4454EUD+ achieves 1% settling in ≤100µs after power supply ramp (Note 2, datasheet p.5). This is measured from VCC crossing 1.5V to output reaching final value ±1%. Power-up time is independent of temperature and supply voltage across the rated range (+2.7V to +5.25V), making it predictable for wake-up timing in low-power systems using the MAX4454EUD+.

How does crosstalk between channels behave in the MAX4454EUD+?

Channel-to-channel crosstalk in the MAX4454EUD+ is −74dB at 1MHz (typ), measured with 100mVp-p output on one amplifier while monitoring adjacent amplifier output. This level of isolation ensures minimal interference in multi-channel applications like I/Q signal processing or simultaneous sensor readouts - sufficient for 12-bit ENOB systems but not recommended for >14-bit precision without physical separation or guard traces.