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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX9766 Datasheet

750mW Audio Amplifiers

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19-2862; Rev 2; 3/07
EVAALVUAAILTAIOBNLEKIT
750mW Audio Amplifiers with Headphone Amp,
Microphone Preamp, and Input Mux
General Description
The MAX9765/MAX9766/MAX9767 family combines
speaker, headphone, and microphone amplifiers, all in
a small thin QFN package. The MAX9765 is targeted at
stereo speaker playback applications and includes a
stereo bridge-tied load (BTL) speaker amp, stereo
headphone amp, single-ended output mic amp, input
MUX, and I2C control. The MAX9766 is targeted at
mono speaker playback applications and includes a
mono BTL speaker amp, stereo headphone amp, differ-
ential output mic amp, input MUX, and I2C control. The
MAX9767 is targeted at applications that do not require
a headphone amp and includes a stereo BTL speaker
amp, differential output mic amp, and parallel control.
These devices operate from a single 2.7V to 5.5V supply.
A high 95dB PSRR allows these devices to operate from
noisy supplies without additional power conditioning. An
ultra-low 0.003% THD+N ensures clean, low distortion
amplification of the audio signal. Click-and-pop suppres-
sion eliminates audible transients on power and shut-
down cycles.
In speaker mode, the amplifiers can deliver up to
750mW of continuous average power into a 4Ω load. In
headphone mode, the amplifier can deliver up to 65mW
of continuous average power into a 16Ω load. The gain
of the amplifiers is externally set, allowing maximum
flexibility in optimizing output levels for a given load.
The MAX9765/MAX9766 also feature a 2:1 input multi-
plexer, allowing multiple audio sources to be selected.
The various functions are controlled by either an I2C-
compatible (MAX9765/MAX9766) or simple parallel
control interface (MAX9767).
All devices include two low-noise microphone pre-
amps, a differential amp for internal microphones, and
a single-ended amplifier for additional external micro-
phones. A microphone bias output is provided, reduc-
ing external component count.
The MAX9765/MAX9766/MAX9767 are available in a
thermally efficient 32-pin thin QFN package (5mm
5mm 0.8mm). All devices have short-circuit and
thermal-overload protection (OVP) and are specified
over the extended -40°C to +85°C temperature range.
PDA Audio Systems
Tablet PCs
Cell Phones
Applications
Notebooks
Digital Cameras
Features
750mW BTL Stereo Speaker Amplifier
65mW Stereo Headphone Amplifier
2.7V to 5.5V Single-Supply Operation
Click-and-Pop Suppression
Low 0.003% THD+N
Low Quiescent Current: 13mA
Low-Power Shutdown Mode: 5µA
MUTE Function
Headphone Sense Input
Stereo 2:1 Input Multiplexer
Optional 2-Wire, I2C-Compatible, or Parallel
Interface
Small 32-Pin Thin QFN (5mm 5mm 0.8mm)
Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX9765ETJ
MAX9766ETJ
-40oC to +85oC
-40oC to +85oC
32 TQFN-EP*
32 TQFN-EP*
T3255-4
T3255-4
MAX9767ETJ -40oC to +85oC 32 TQFN-EP* T3255-4
*EP = Exposed paddle.
Pin Configurations and Functional Diagrams appear at end of data
sheet.
Simplified Diagram
MUX
INL1
INL2
MUX
INR1
INR2
SPKR HEADPHONE
LEFT
SPKR
RIGHT
DEVICE
CONTROL
CONTROL
MICIN-
MICIN+
AUXIN
MICBIAS
MUX
MAX9765
BIAS
MICOUT
________________________________________________________________ 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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX9766 Datasheet

750mW Audio Amplifiers

No Preview Available !

750mW Audio Amplifiers with Headphone Amp,
Microphone Preamp, and Input Mux
ABSOLUTE MAXIMUM RATINGS
VDD to GND ...........................................................................+6V
SVDD to GND .........................................................................+6V
SVDD to VDD.........................................................................-0.3V
PVDD to VDD .......................................................................±0.3V
PGND to GND.....................................................................±0.3V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Output Short-Circuit Duration (to VDD or GND)..........Continuous
Continuous Input Current (into any pin except power-supply
and output pins) ...............................................................±20mA
Continuous Power Dissipation (TA = +70°C)
32-Pin Thin QFN (derate 26.3mW/°C above +70°C) ...2105.3mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = PVDD = 3.0V, GND = 0, HPS = MUTE = GND, SHDN = 3V, CBIAS = 1µF, RIN = RF = 15k, RL = . TA = TMIN to TMAX, unless
otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Quiescent Supply Current
(IVDD + IPVDD)
Shutdown Current
SYMBOL
CONDITIONS
VDD/PVDD Inferred from PSRR test
MAX9765/MAX9767
Speaker mode
IDD MAX9766
ISHDN
Headphone mode, HPS = VDD
SHDN = GND
MIN TYP MAX UNITS
2.7 5.5 V
12 28
7 17 mA
7 17
5 18 µA
Switching Time
tSW
Gain or input switching
(MAX9765/MAX9766)
10 µs
Turn-On/Turn-Off Time
tON/OFF
Input Bias Current
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Output Short-Circuit Current
STANDBY SUPPLY (SVDD)
IBIAS
Standby Current
ISVDD
OUTPUT AMPLIFIERS (SPEAKER MODE)
Output Offset Voltage
VOS
Power-Supply Rejection Ratio
PSRR
Output Power
POUT
Total Harmonic Distortion Plus
Noise
THD+N
CBIAS = 1µF, settled to 90%
CBIAS = 0.1µF, settled to 90%
To VDD or GND
VBIAS = 1.25V, VDD = 0V
VBIAS = 1.5V, VDD = 3V
VOUT_+ - VOUT_-, AV = 1V/V
VDD = 2.7V to 5.5V
f = 1kHz, VRIPPLE = 200mVP-P
fIN = 1kHz, THD+N = 1%, RL = 8
TA = +25oC (Note 2)
RL = 4
fIN = 1kHz, BW = 22Hz to
22kHz
POUT = 200mW,
RL = 8
POUT = 400mW,
RL = 4
72
400
250
25
50
150
8
1.2
230
10
85
72
450
750
0.033
0.065
400
5
45
ms
nA
oC
oC
A
µA
mV
dB
mW
%
Signal-to-Noise Ratio
SNR
RL = 8, VOUT_ = 1.4VRMS, BW = 22Hz to
89
dB
22kHz
2 _______________________________________________________________________________________


Part Number MAX9766
Description 750mW Audio Amplifiers
Maker Maxim Integrated Products
Total Page 30 Pages
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