19-5235; Rev 1; 2/11
Stereo Audio CODEC
with FlexSound Technology
General Description
The MAX9888 is a full-featured audio CODEC whose
high performance and low power consumption make it
ideal for portable applications.
Features
S 100dB DR Stereo DAC (8kHz < f < 96kHz)
S
S 91dB DR Stereo ADC (8kHz < f < 96kHz)
S
S Stereo Low EMI Class D Amplifiers
950mW/Channel (8I, V
= 4.2V)
SPKVDD_
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.
S Stereo DirectDrive Headphone Amplifiers
S Differential Receiver Amplifier
S 2 Stereo Single-Ended/Mono Differential Line
Inputs
S 3 Differential Microphone Inputs
®
DirectDrive headphone amplifiers provide a true
S FlexSound Technology
5-Band Parametric EQ
ground-referenced output, eliminating the need for
large DC-blocking capacitors. 1.8V headphone opera-
tion ensures low power consumption. The device also
includes a differential receiver amplifier.
Automatic Level Control (ALC)
Excursion Limiter
Speaker Power Limiter
Speaker Distortion Limiter
Microphone Automatic Gain Control
and Noise Gate
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.
S Dual I2S/PCM/TDM Digital Audio Interfaces
S Asynchronous Digital Mixing
S Supports Master Clock Frequencies from 10MHz
to 60MHz
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.
S RF Immune Analog Inputs and Outputs
S Extensive Click-and-Pop Reduction Circuitry
S I2C Control Interface
S 63 WLP Package (3.80mm x 3.30mm, 0.4mm Pitch)
Ordering Information
The device is fully specified over the -40NC to +85NC
extended temperature range.
PART
TEMP RANGE
PIN-PACKAGE
MAX9888EWY+
-40NC to +85NC
63 WLP
DirectDrive is a registered trademark and FlexSound is a
trademark of Maxim Integrated Products, Inc.
+Denotes lead(Pb)-free/RoHS-compliant package.
Simplified Block Diagram
2
I
2
2
I S/PCM
C
I
S/PCM
RECEIVER AMP
DIGITAL
AUDIO
DIGITAL
AUDIO
CONTROL
INTERFACE
INTERFACE
DIGITAL MICROPHONE
SPEAKER AMP
INPUT
FlexSound TECHNOLOGY
• 5-BAND PARAMETRIC EQ
• AUTOMATIC LEVEL CONTROL
• LOUDSPEAKER PROCESSING
• EXCURSION LIMITER
• THD LIMITER
ADC
DAC
SPEAKER AMP
MIX
MIX
• POWER LIMITER
LINEIN A1
• MICROPHONE PROCESSING
• AUTOMATIC GAIN CONTROL
• NOISE GATE
• ASYNCHRONOUS DIGITAL
MIXING
HEADPHONE AMP
ADC
DAC
LINEIN A2
+
LINEIN B1
MAX9888
HEADPHONE AMP
LINEIN B2
+
_______________________________________________________________ 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.
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