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_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
19-5335; Rev 0; 6/10
Simplified Block Diagram
General Description
The MAX98088 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 com-
pletely filterless operation. Integrated bypass switches
optionally connect an external amplifier to the transducer
when the Class D amplifiers are disabled.
The IC features a stereo Class H headphone amplifier
that utilizes a dual-mode charge pump to maximize effi-
ciency while outputting a ground referenced signal that
does not require output coupling capacitors.
The IC also features a mono differential amplifier that can
also be configured as a stereo line output.
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 FLEXSOUNDK technology improves loud-
speaker performance by optimizing the signal level and
frequency response while limiting the maximum distor-
tion 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 -40NC to +85NC
extended temperature range.
Features
S 5.6mW Power Comsumption (DAC to HP at 97dB DR)
S
101dB DR Stereo DAC (8kHz < f
S
< 96kHz)
S
93dB DR Stereo ADC (8kHz < f
S
< 96kHz)
S
Stereo Low EMI Class D Amplifiers
950mW/Channel (8I, V
SPKVDD_
= 4.2V)
S
Efficient Class H Headphone Amplifier
S
Differential Receiver Amplifier/Stereo Line Outputs
S
2 Stereo Single-Ended/Mono Differential Line
Inputs
S
3 Differential Microphone Inputs
S
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
S
Dual I
2
S/PCM/TDM Digital Audio Interfaces
S
Asynchronous Digital Mixing
S
Supports Master Clock Frequencies from 10MHz
to 60MHz
S
RF Immune Analog Inputs and Outputs
S
Extensive Click-and-Pop Reduction Circuitry
S
Available in 63-Bump WLP Package (3.80mm x
3.30mm, 0.4mm Pitch)
+Denotes lead(Pb)-free/RoHS-compliant package.
Ordering Information
FLEXSOUND is a trademark of Maxim Integrated Products,
Inc.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX98088EWY+ -40NC to +85NC 63 WLP
DIGITAL MICROPHONE
INPUT
+
+
LINEIN A1
LINEIN A2
LINEIN B1
LINEIN B2
DAC
DAC
MIX
RECEIVER/LINEOUT AMPS
SPEAKER AMP
SPEAKER AMP
HEADPHONE AMP
HEADPHONE AMP
ADC
ADC
MIX
FLEXSOUND
TECHNOLOGY
• 5-BAND PARAMETRIC EQ
• AUTOMATIC LEVEL CONTROL
• LOUDSPEAKER PROCESSING
• EXCURSION LIMITER
• THD LIMITER
• POWER LIMITER
• MICROPHONE PROCESSING
• AUTOMATIC GAIN CONTROL
• NOISE GATE
• ASYNCHRONOUS DIGITAL MIXING
I
2
C
CONTROL
I
2
S/PCM
DIGITAL
AUDIO
INTERFACE
I
2
S/PCM
MAX98088
DIGITAL
AUDIO
INTERFACE

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