MAX985EUK-T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: Low Noise, High Efficiency
• Package: SOT-23-5
• Essence: Single-Channel Class D Amplifier
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 1.4W into 8Ω at 5V
• Total Harmonic Distortion + Noise (THD+N): 0.04% at 1kHz, 1.2W into 8Ω
• Efficiency: 88% at 1.2W into 8Ω
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX985EUK-T has a total of 5 pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| IN SHD |-- Pin 2: Shutdown Control (SHD) --| OUT FB |-- Pin 3: Feedback (FB) --| PVDD NC |-- Pin 4: No Connection (NC) --| PGND VDD |-- Pin 5: Power Supply (VDD) |___________| ```

Functional Features

• Single-channel audio amplifier with high efficiency and low noise.
• Operates from a wide supply voltage range of 2.7V to 5.5V.
• Provides an output power of 1.4W into an 8Ω load at 5V supply voltage.
• Offers excellent total harmonic distortion + noise (THD+N) performance.
• Includes a shutdown control pin for power-saving mode.
• Features a small SOT-23-5 package, suitable for space-constrained applications.

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption.
• Low noise ensures high-quality audio output.
• Shutdown control allows for power-saving operation.
• Small package size enables compact designs.

Disadvantages

• Limited output power compared to larger amplifiers.
• Single-channel configuration may not suit stereo applications.

Working Principles

The MAX985EUK-T is a single-channel Class D amplifier. It utilizes pulse-width modulation (PWM) techniques to convert the input audio signal into a high-frequency square wave. This square wave is then filtered and amplified to produce the desired audio output. The Class D amplifier design offers high efficiency by minimizing power dissipation in the output stage.

Detailed Application Field Plans

The MAX985EUK-T is well-suited for various portable audio applications, including:

1. Mobile Phones: Provides enhanced audio quality for multimedia playback and hands-free communication.
2. Portable Media Players: Enables clear and powerful audio output for music and video playback.
3. Tablets and Laptops: Enhances the audio experience during media consumption and video conferencing.
4. Bluetooth Speakers: Delivers high-quality sound reproduction in compact wireless speaker systems.
5. Gaming Devices: Improves the audio performance of handheld gaming consoles and accessories.

Detailed and Complete Alternative Models

1. MAX98306: 3.2W Mono Class D Audio Power Amplifier with Integrated Boost Converter.
2. TPA3110D2: 15W Stereo Class D Audio Power Amplifier with Differential Inputs.
3. LM4863: 2.2W Mono Class AB Audio Power Amplifier with Shutdown Mode.
4. PAM8403: 3W Stereo Class D Audio Power Amplifier with Volume Control.
5. TDA7492: 50W + 50W Dual BTL Class D Audio Amplifier.

These alternative models offer different power outputs, features, and package options to suit various audio amplifier requirements.

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