MAX9888

Stereo Audio CODEC with FlexSound Technology

DSP Features ALC, THD, and Power Limiting to Improve Sound Quality with No Need to Modify Form Factor

Data Sheet (Rev. 1)
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Overview

  • 100dB DR Stereo DAC (8kHz < fS < 96kHz)
  • 91dB DR Stereo ADC (8kHz < fS < 96kHz)
  • Stereo Low EMI Class D Amplifiers
    • 950mW/Channel (8Ω, VSPKVDD_ = 4.2V)
  • Stereo DirectDrive Headphone Amplifiers
  • Differential Receiver Amplifier
  • 2 Stereo Single-Ended/Mono Differential Line Inputs
  • 3 Differential Microphone Inputs
  • FlexSound Technology
    • 5-Band Parametric EQ
    • Automatic Level Control (ALC)
    • Excursion Limiter
    • Speaker Power Limiter
    • Speaker Distortion Limiter
    • Microphone Automatic Gain Control and Noise Gate
  • Dual I²S/PCM/TDM Digital Audio Interfaces
  • Asynchronous Digital Mixing
  • Supports Master Clock Frequencies from 10MHz to 60MHz
  • RF Immune Analog Inputs and Outputs
  • Extensive Click-and-Pop Reduction Circuitry
  • I²C Control Interface
  • 63 WLP Package (3.80mm x 3.30mm, 0.4mm Pitch)

The MAX9888 is a full-featured audio CODEC whose high performance and low power consumption make it ideal for portable applications.

Class D speaker amplifiers provide efficient amplification for two speakers. Low radiated emissions enable completely filterless operation. Integrated bypass switches optionally connect an external amplifier to the transducer when the Class D amplifiers are disabled.

DirectDrive® headphone amplifiers provide a true ground-referenced output, eliminating the need for large DC-blocking capacitors. 1.8V headphone operation ensures low power consumption. The device also includes a differential receiver amplifier.

Three differential analog microphone inputs are available as well as support for two PDM digital microphones. Integrated switches allow microphone signals to be routed out to external devices. Two flexible single-ended or differential line inputs may be connected to an FM radio or other sources.

Integrated FlexSound™ technology improves loudspeaker performance by optimizing the signal level and frequency response while limiting the maximum distortion and power at the output to prevent speaker damage. Automatic gain control (AGC) and a noise gate optimize the signal level of microphone input signals to make best use of the ADC dynamic range.

The device is fully specified over the -40°C to +85°C extended temperature range.
MAX9888
Stereo Audio CODEC with FlexSound Technology
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Documentation

Data Sheet 1

Reliability Data 1

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Hardware Ecosystem

Parts Product Life Cycle Description
Audio & Video Converters 1
MAX98089
PRODUCTION Low-Power, Stereo Audio Codec with FlexSound Technology
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Evaluation Kits

MAX9888EVKIT

Evaluation Kit for the MAX9888

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Features and Benefits

  • 2.8V to 5.5V Single-Supply Operation
  • Proven Audio PCB Layout
  • On-Board USB-to-I²C Interface
  • On-Board USB-to-I²S Converter
  • On-Board S/PDIF Transceiver
  • On-Board Clock Source
  • On-Board Digital Microphone
  • Evaluates the MAX9888EWY+ in a 3.8mm x 3.3mm, 63-Bump WLP Package
  • Windows XP-, Windows Vista-, and Windows 7-Compatible Software
  • Fully Assembled and Tested

Product Details

The MAX9888 evaluation kit (EV kit) is a fully assembled and tested circuit board that evaluates the MAX9888 audio codec. The MAX9888 is an integrated audio codec including microphone amplifiers, line amplifiers, an earpiece amplifier, stereo Class D amplifiers, stereo DirectDrive® headphone amplifiers, and digital signal processing. The EV kit also includes Windows XP®-, Windows Vista®-, and Windows® 7-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the device.

The EV kit provides access to all analog and digital inputs/outputs on the device. To enable easy connection to a wide range of audio sources, audio devices are included to convert both USB data and S/PDIF data to I²S.

The EV kit integrates a MAXQ2000 microcontroller to enable I²C communication with devices on the EV kit. The EV kit software, running on a Windows PC, communicates with the EV kit over a standard USB port. The EV kit software provides an intuitive interface to exercise the functions of the device.

The EV kit comes with a MAX9888EWY+ installed.
MAX9888EVKIT
Evaluation Kit for the MAX9888

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