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PDF MAX9851 Data sheet ( Hoja de datos )
| Número de pieza | MAX9851 | |
| Descripción | (MAX9851 / MAX9853) Stereo Audio CODECs | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3732; Rev 1; 8/06
EVAALVUAAILTAIOBNLEKIT
Stereo Audio CODECs with Microphone, DirectDrive
Headphones, Speaker Amplifiers, or Line Outputs
General Description
The MAX9851/MAX9853 are single-chip, stereo audio
CODECs designed to provide a complete audio solu-
tion for a GSM/GPRS/EDGE cell phone. The MAX9851/
MAX9853 provide stereo DirectDriveTM headphone
amplifiers, a mono receiver speaker amplifier, stereo
Class D speaker amplifiers (MAX9851 only), stereo dif-
ferential line outputs (MAX9853 only), microphone input
amplifiers, plus flexible input selection and gain control.
Two serial digital audio interfaces are included, one
intended to accept voiceband data and the other
accepting I2S data. The voiceband interface can be
reconfigured as needed to act as a secondary I2S feed
input—allowing multiple audio source mixing of ringer
tones or other audio at different sample rates. A trans-
ducer/vibrator signal can be derived from digital audio.
The stereo digital-to-analog converter (DAC) path
includes filtering and mixing, programmable-gain ampli-
fiers (PGA), soft muting, and optional voiceband digital
filtering. The MAX9851/MAX9853 accept up to two digital
audio inputs at different sample rates. All analog inputs
have PGAs on the front end, allowing dynamic range
optimization with a wide range of input sources.
Thewww.DataSheet4U.com stereo analog-to-digital converter (ADC) converts
audio signals from either internal or external microphones
or stereo line inputs. The microphone amplifiers have a
programmable gain from 0 to 40dB to handle both ampli-
fied microphones and electret modules. In addition to a
digital highpass filter to remove DC offset voltages, the
ADC also features voiceband digital filtering.
The digital audio interfaces support a variety of serial
audio formats. The secondary serial audio interface has
an independent supply voltage to allow integration into
multiple supply systems. Control for volume levels, sig-
nal mixing, and operating modes is done through the
I2C 2-wire interface.
All circuitry is optimized for high PSRR. The MAX9851/
MAX9853 use a thermally efficient, space-saving 48-pin
thin QFN package (7mm x 7mm x 0.8mm) with an
exposed pad.
Applications
GSM/GPRS/EDGE Cell Phones
PDAs/SmartPhones
Features
o +1.7V to +3.3V (Digital) and +2.6V to +3.3V
(Analog) Operation
o +2.6V to +5.5V Class D Speaker Amplifier
Operation (Direct from Battery)
o Low 26mW Quiescent Power Consumption
(Playback)
o High 98dB Power-Supply Rejection Ratio
o 8kHz to 48kHz Sample Rate (Replay and Record)
o Stereo 18-Bit ADC and DAC
o Low-Noise Stereo Microphone Inputs and Stereo
Line Inputs
o Dual Source Digital Mixing (DAC)
o Selectable Voiceband Filter for
Recording/Playback Modes
o Digital Filtering, Soft Mute, and Volume Control
o Low-Noise, High-PSRR Microphone Bias
Generator
o Stereo DirectDrive Headphone Amplifier
(2 x 50mW)
o Mono DirectDrive Handset Receiver Amplifier
(1 x 105mW)
o Stereo Class D, Ultra-Low-EMI, Filterless Speaker
Amplifier with Active Emissions Limiting
(2 x 1.25W, 8Ω) (MAX9851)
o Stereo Differential Line Output Amplifiers
(MAX9853)
o Clickless/Popless Operation
o Flexible Shutdown Modes for Power Saving
o Comprehensive Headset Detection
o Ultra-Low Power Wake-Up on Headset Detection
Ordering Information
PART
PIN-PACKAGE
PKG CODE
MAX9851ETM+
48 TQFN-EP**
(7mm x 7mm x 0.8mm)
T4877-6
MAX9853ETM+
48 TQFN-EP**
(7mm x 7mm x 0.8mm)
T4877-6
Note: All devices specified over the -40°C to +85°C temperature
range.
+Denotes lead-free package.
**EP = Exposed pad.
Pin Configurations and Selector Guide appear at end of data
sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Stereo Audio CODECs with Microphone, DirectDrive
Headphones, Speaker Amplifiers, or Line Outputs
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = CPVDD = +3V, DVDD = DVDDS2 = +1.8V, PVDD = +3.3V, RHP = 32Ω, ZSPK = 8Ω + 10µH, RREC = 32Ω, ROUTL+ to ROUTL- =
10kΩ, ROUTR+ to ROUTR- = 10kΩ, C1 = 0.22µF, C2 = CNREG = CPREG = CINTMICBIAS, CMBIAS = CREF = 1µF, MCLK = 13MHz, all
PGAs = 0dB, HP/REC volume = -20.0dB, SPK volume = -20.4dB, line output gain = -0.4dB, TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.) (See Functional Diagrams/Typical Operating Circuits).
PARAMETER
Total Harmonic Distortion Plus
Noise
SYMBOL
THD+N
CONDITIONS
fIN = 1kHz, fS = 8kHz, 0dBFS (voice mode
master mode, ADC and headphone output
enabled, no load), headphone volume =
+2.5dB
fIN = 1kHz, fS = 48kHz, 0dBFS (ADC and
headphone output enabled, no load),
headphone volume = +2.5dB
MIN TYP MAX UNITS
-71.5
-84.5
dB
Signal-to-Noise Ratio (Note 7)
SNR
fIN = 1kHz, fS = 8kHz and 16kHz (voice
modes), headphone volume = +2.5dB
fIN = 1kHz, fS = 8kHz to 48kHz (stereo audio
modes), headphone volume = +2.5dB
75.5
88
Crosstalk
XTALK Driven channel at -1dBFS, fIN = 1kHz,
fS = 8kHz, headphone output (no load)
-95
Power-Supply Rejection Ratio
www.DataSheet4U.com DAC DIGITAL FILTERS
PSRR
f = 217Hz, VRIPPLE = 100mVP-P
f = 10kHz, VRIPPLE = 100mVP-P
95
68
Passband Cutoff
fPD
0.44
Passband Ripple
f < fPD
Stopband Cutoff
fSD
Stopband Attenuation
f > fSD
60
Attenuation at fS / 2
-6.02
DAC VOICEBAND HIGHPASS FILTER (S1 Mono Voice Input Path, fS = 8kHz, Register 0x07 bit 4 = 1)
Passband Cutoff
fPH
Passband -3dB Cutoff
Passband Ripple
fP3_H
f > fPH
Stopband Cutoff
Stopband Attenuation
fSH
f < fSH
77
28
DAC VOICEBAND HIGHPASS FILTER (S1 Mono Voice Input Path, fS = 16kHz, Register 0x07, bit 4 = 1)
Passband Cutoff
fPH
Passband -3dB Cutoff
fP3_H
Passband Ripple
f > fPH
Stopband Cutoff
fSH
154
Stopband Attenuation
f < fSH
28
DAC VOICEBAND LOWPASS FILTER (S1 Mono Voice Input Path, fS = 8kHz)
Passband Cutoff
fPL
3500
Passband Ripple
f < fPL
Stopband Cutoff
fSL
Stopband Attenuation
f > fSL
75
±0.2
0.58
175
130
±0.2
350
260
±0.2
±0.05
3900
dB
dB
dB
fS
dB
fS
dB
dB
Hz
Hz
dB
Hz
dB
Hz
Hz
dB
Hz
dB
Hz
dB
Hz
dB
_______________________________________________________________________________________ 5
5 Page 
Stereo Audio CODECs with Microphone, DirectDrive
Headphones, Speaker Amplifiers, or Line Outputs
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = CPVDD = +3V, DVDD = DVDDS2 = +1.8V, PVDD = +3.3V, RHP = 32Ω, ZSPK = 8Ω + 10µH, RREC = 32Ω, ROUTL+ to ROUTL- =
10kΩ, ROUTR+ to ROUTR- = 10kΩ, C1 = 0.22µF, C2 = CNREG = CPREG = CINTMICBIAS, CMBIAS = CREF = 1µF, MCLK = 13MHz, all
PGAs = 0dB, HP/REC volume = -20.0dB, SPK volume = -20.4dB, line output gain = -0.4dB, TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.) (See Functional Diagrams/Typical Operating Circuits).
PARAMETER
SYMBOL
RECEIVER AMPLIFIER (Note 12)
CONDITIONS
MIN TYP MAX UNITS
RL = 16Ω, input signal
from LINEIN1
80
Output Power
POUT
f = 1kHz, THD <
1%, +5.5dB
volume setting
RL = 16Ω, input signal
is the sum of
LINEIN1+LINEIN2
105
mW
RL = 32Ω, input signal
from LINEIN1
35
55
Maximum Output Voltage
+4.5dB volume setting, 0dB PGA setting,
input signal 0dBFS from DAC output, only 1
input selected
3.09
3.35
3.64
VP-P
Line In to REC Out Voltage Gain
Output Offset Voltage
www.DataSheet4U.com
Total Harmonic Distortion Plus
Noise
Dynamic Range
Power-Supply Rejection Ratio
Maximum Capacitive Load
Click-and-Pop Level
VOLUME CONTROL/PGAs
Headphone/Receiver Volume
Control Range
VOS
THD+N
DR
PSRR
CL
KCP
+4.5dB volume setting, 0dB PGA setting,
only 1 input selected
RL = 32Ω, POUT = 40mW, f = 1kHz, BW =
22Hz to 20kHz, +3dB volume setting
RL = 16Ω, POUT = 40mW, f = 1kHz, BW =
22Hz to 20kHz, +3dB volume setting
+6dB volume setting, A-weighted
AVDD = 2.6V to 3.3V
VRIPPLE = 100mVP-P, f = 217Hz
VRIPPLE = 100mVP-P, f = 20kHz
No sustained oscillations
Peak voltage, 32 samples per second,
A-weighted, RL = 16Ω (Note 11)
1.54 1.68 1.82
10 60
0.03
0.04
92
60 100
98
65
150
-44.6
V/V
mV
%
dB
dB
pF
dBV
-80
+6.1
dB
Headphone/Receiver Mute
Attenuation
f = 1kHz
100 dB
Speaker Volume Control Range
(MAX9851)
-72.4
+13.7 dB
Speaker Mute Attenuation
(MAX9851)
f = 1kHz
100 dB
Differential Line Output Gain
Control Range (MAX9853)
-78.4
+7.9
dB
Differential Line Output Mute
Attenuation (MAX9853)
f = 1kHz
100 dB
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX9851.PDF ] | |
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