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PDF MAX9888 Data sheet ( Hoja de datos )
| Número de pieza | MAX9888 | |
| Descripción | Stereo Audio CODEC | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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DataSheet.in
19-5235; Rev 0; 6/10
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.
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.
DirectDrive® headphone amplifiers provide a true
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.
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.
DirectDrive is a registered trademark and FLEXSOUND is a
trademark of Maxim Integrated Products, Inc.
Features
S 100dB DR Stereo DAC (8kHz < fS < 96kHz)
S 91dB DR Stereo ADC (8kHz < fS < 96kHz)
S Stereo Low EMI Class D Amplifiers
950mW/Channel (8I, VSPKVDD_ = 4.2V)
S Stereo DirectDrive Headphone Amplifiers
S Differential Receiver Amplifier
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 I2S/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 I2C Control Interface
S 63 WLP Package (3.80mm x 3.30mm, 0.4mm Pitch)
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX9888EWY+ -40NC to +85NC
63 WLP
+Denotes lead(Pb)-free/RoHS-compliant package.
Simplified Block Diagram
LINEIN A1
LINEIN A2
DIGITAL MICROPHONE
INPUT
+
I2C
I2S/PCM
I2S/PCM
CONTROL
DIGITAL
AUDIO
INTERFACE
DIGITAL
AUDIO
INTERFACE
FLEXSOUND TECHNOLOGY
• 5-BAND PARAMETRIC EQ
ADC • AUTOMATIC LEVEL CONTROL DAC
MIX • LOUDSPEAKER PROCESSING
• EXCURSION LIMITER
• THD LIMITER
• POWER LIMITER
• MICROPHONE PROCESSING
• AUTOMATIC GAIN CONTROL
ADC • NOISE GATE
• ASYNCHRONOUS DIGITAL
DAC
MIXING
RECEIVER AMP
SPEAKER AMP
SPEAKER AMP
MIX
HEADPHONE AMP
LINEIN B1
LINEIN B2
+
MAX9888
HEADPHONE AMP
________________________________________________________________ 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.
1 page  
DataSheet.in
Stereo Audio CODEC
with FLEXSOUND Technology
Functional Diagram
5
5 Page 
DataSheet.in
Stereo Audio CODEC
with FLEXSOUND Technology
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD = VHPVDD = VDVDD = VDVDDS1 = VDVDDS2 = +1.8V, VSPKLVDD = VSPKRVDD = 3.7V. Speaker loads (ZSPK) connected
between SPK_P and SPK_N. Receiver load (RREC) connected between RECP and RECN. Headphone loads (RHP) connected from
HPL or HPR to GND. RHP = J, RREC = J, ZSPK = J, CREF = 2.2FF, CMICBIAS = CPREG = CREG = 1FF, CC1N-C1P = 1FF, CHPVSS
= 1FF. AVMICPRE_ = +20dB, AVMICPGA_ = 0dB, AVDACATTN = 0dB, AVDACGAIN = 0dB, AVADCLVL = 0dB, AVADCGAIN = 0dB,
AVPGAIN_ = 0dB, AVPGAOUT_ = 0dB, AVHP_ = 0dB, AVREC = 0dB, AVSPK_ = 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1.
TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)
PARAMETER
Passband Ripple
SYMBOL
f < fPLP
CONDITIONS
Stopband Cutoff
fSLP
Stopband Attenuation
f < fSLP
ADC STEREO AUDIO MODE DC-BLOCKING HIGHPASS FILTER (MODE1 = 1)
MIN TYP MAX UNITS
-0.1 +0.1 dB
0.417
x fs
Hz
60 dB
Passband Cutoff
(-3dB from Peak)
fAHPPB AVFLT ≠ 000
0.000125
x fs
Hz
DC Attenuation
DCAtten AVFLT ≠ 000
MICROPHONE AUTOMATIC GAIN CONTROL
AGC Hold Duration
AGCHLD = 01
AGCHLD = 11
AGC Attack Time
AGCATK = 00
AGCATK = 11
AGC Release Time
AGCRLS = 000
AGCRLS = 111
AGC Threshold Level
AGCTH = 0x0 to 0xF
AGC Threshold Step Size
AGC Gain
(Note 5)
ADC NOISE GATE
NG Threshold Level
ANTH = 0x3 to 0xF, referred to 0dBFS
NG Attenuation
(Note 5)
ADC-TO-DAC DIGITAL SIDETONE (MODE = 0)
Sidetone Gain Adjust Range
AVSTGA
DVST = 0x01
DVST = 0x1F
Sidetone Gain Adjust Step Size
Sidetone Path Phase Delay
1kHz, 0dB input, highpass 8kHz
filter disabled
16kHz
ADC-TO-DAC DIGITAL LOOP-THROUGH PATH
90 dB
50
400
ms
2
123
ms
0.078
10
s
-3 +18 dB
1 dB
0 20 dB
-64 -16 dB
0 12 dB
-0.5
-60.5
2
2.2
1.1
dB
dB
ms
Dynamic Range (Note 4)
DR
fS = 48kHz, MCLK = 12.288MHz, MODE = 1
(FIR audio)
89 dB
Total Harmonic Distortion
THD
f = 1kHz, fS = 48kHz, MCLK = 12.288MHz,
MODE = 1 (FIR audio)
-71 -66 dB
DAC LEVEL CONTROL
DAC Attenuation Range
DAC Attenuation Step Size
DAC Gain Adjust Range
DAC Gain Adjust Step Size
AVDACATTN DV1DV2 = 0xF to 0x0 (Note 5)
AVDACGAIN DV1G = 00 to 11 (Note 5)
-15
1
0
6
0 dB
dB
18 dB
dB
11
11 Page | ||
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| PDF Descargar | [ Datasheet MAX9888.PDF ] | |
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