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High-Efficiency, Low-Noise Audio Subsystem

Audio Subsystem with Best-in-Class EMI Reduction and Highly Efficient Class H Stereo Headphone Amplifiers

Product Details

Key Features

Parametric specs for Integrated Amplifiers
Functions Mobile Communication Subsystem
Netbook Subsystem
PC Notebook Subsystem
Class D
Spkr. Amp. VCC (V) (min) 2.7
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 1.64
Spkr. Amp. POUT (W) 1
Spkr. Amp. Half Pwr. THD+N (%) 0.03
Headphone Amplifier VCC (V) (min) 1.6
Headphone Amplifier VCC (V) (max) 2
Headphone Amplifier ICC (mA) (typ) 2
Hdph. Amp. POUT into 32Ω (mW) (@ 1% THD+N) 0.034
Headphone Amplifier Half-Power THD+N (%) 0.006
Package/Pins WLP/20
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for Integrated Amplifiers
Functions Mobile Communication Subsystem
Netbook Subsystem
PC Notebook Subsystem
Class D
Spkr. Amp. VCC (V) (min) 2.7
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 1.64
Spkr. Amp. POUT (W) 1
Spkr. Amp. Half Pwr. THD+N (%) 0.03
Headphone Amplifier VCC (V) (min) 1.6
Headphone Amplifier VCC (V) (max) 2
Headphone Amplifier ICC (mA) (typ) 2
Hdph. Amp. POUT into 32Ω (mW) (@ 1% THD+N) 0.034
Headphone Amplifier Half-Power THD+N (%) 0.006
Package/Pins WLP/20
Budgetary
Price (See Notes)
0

Key Features

  • 2.7V to 5.5V Speaker Supply Voltage
  • 1.8V Headphone Supply Voltage
  • 1.0W Speaker Output (VPVDD = 4.2V, ZSPK = 8Ω + 68µH, 1% THD+N)
  • 32mW/Channel Headphone Output (RHP = 32Ω)
  • Active Emissions Limiting for Enhanced EMI Reduction
  • Efficient Class H Headphone Amplifier
  • Ground-Referenced Headphone Outputs
  • Headphone Ground Sense
  • 2 Stereo Single-Ended/Mono Differential Inputs
  • Integrated Expander/Noise Gate for Low Output Noise
  • Integrated DRC (Speaker Outputs)
  • Integrated Distortion Limiter (Speaker Outputs)
  • Extensive Click-and-Pop Reduction Circuitry
  • TDMA Noise Free
  • 2.0mm x 2.4mm, 20-Bump WLP Package (0.4mm Pitch)

Applications/Uses

  • Cell Phones
  • Portable Media Players

Description

The MAX97003 audio subsystem combines a mono speaker amplifier with a stereo headphone amplifier. The headphone and speaker amplifiers have independent volume and on/off controls. The four inputs are configurable as two differential or four single-ended inputs.

To minimize output noise, both the headphone and speaker outputs utilize a downward expander/noise gate to attenuate noise when no desired input signal is present.

The speaker output incorporates an adjustable dynamic range compressor (DRC) and distortion limiter to protect the speaker and maximize loudness. This allows high gain for low-level signals without compromising the quality of large signals.

All controls are performed using the two-wire I²C interface. The IC operates in the extended -40°C to +85°C temperature range, and is available in the 2.0mm x 2.4mm, 20-bump WLP package (0.4mm pitch).

Simplified Block Diagram

MAX97003: Simplified Block Diagram MAX97003: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .