MAX9875

Low RF Susceptibility Mono Audio Subsystem with DirectDrive Headphone Amplifier

Industry's Smallest Size and Best-in-Class RF Susceptibility (TDMA Noise Free) Audio Subsystem

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Part Details

  • Low Emissions, Filterless Class D Amplifier Achieves Better than 10dB Margin Under EN55022 Class B Limits
  • Low RF Susceptibility Design Rejects TDMA Noise from GSM Radios
  • Input Mixer with User-Defined Input Mode
  • 725mW Speaker Output (RSPK = 8Ω, PVDD = 3.7V)
  • 53mW Headphone Output (RHP = 16Ω, VDD = 3.7V)
  • Low 0.05% THD+N at 1kHz (Class D Power Amplifier)
  • Low 0.016% THD+N at 1kHz (Headphone Amplifier)
  • 87% Efficiency (RSPK = 8Ω, POUT = 750mW)
  • High Speaker Amplifier PSRR (72dB at 217Hz)
  • High Headphone Amplifier PSRR (84dB at 217Hz)
  • I²C Control
  • Hardware and Software Shutdown Mode
  • Click-and-Pop Suppression
  • Current-Limit and Thermal Protection
  • Available in a Space-Saving, 2.5mm x 2.0mm WLP Package
MAX9875
Low RF Susceptibility Mono Audio Subsystem with DirectDrive Headphone Amplifier
MAX9875: Simplified Block Diagram
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Hardware Ecosystem

Parts Product Life Cycle Description
Product 1
MAX9877 Low RF Susceptibility Mono Audio Subsystem with DirectDrive Headphone Amplifier
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Evaluation Kits

MAX9875EVKIT

Evaluation Kit for the MAX9875

Features and Benefits

  • 2.7V to 5.25V Single-Supply Operation
  • Proven Audio PCB Layout
  • On-Board USB Interface Circuit Generates I²C-Compatible Signals
  • USB-PC Connection (Cable Included)
  • PCB Pads for User-Supplied I²C-Compatible Signals
  • PCB Pads for Audio Input and Output Signals
  • Evaluates the MAX9875ERP+ in a 2mm x 2.5mm, 20-Bump, (5 x 4) UCSP™ Package
  • Windows 2000/XP- and Windows Vista (32-Bit)-Compatible Software
  • Lead(Pb)-Free and RoHS Compliant
  • Fully Assembled and Tested

Product Details

The MAX9875 evaluation kit (EV kit) is an assembled and tested PCB that evaluates the MAX9875 IC. The MAX9875 is a Class D audio power amplifier and stereo DirectDrive® headphone amplifier communicating over a 2-wire I²C interface. The MAX9875 features user-defined input configuration, input gain, input source, output enable, volume control, and oscillator frequency-modulation modes. The user-defined features are programmed through the I²C-compatible serial interface, communicating at data rates up to 400kbps. The I²C data is sent through an on-board USB interface circuit using a computer or a user-supplied I²C bus.

The EV kit also features Windows® 2000/XP®- and Windows Vista®-compatible software that provides a user interface for exercising the MAX9875's features. The program is menu driven and offers a graphical user interface (GUI) complete with buttons, checkboxes, and track bars.

Applications

  • Cell Phones
  • Portable Multimedia Players

MAX9875EVKIT
Evaluation Kit for the MAX9875

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