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PDF MAX9766 Data sheet ( Hoja de datos )
| Número de pieza | MAX9766 | |
| Descripción | (MAX9765 - MAX9767) 750mW Audio Amplifiers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9766 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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19-2862; Rev 1; 2/05
750mW Audio Amplifiers with Headphone Amp,
Microphone Preamp, and Input Mux
General Description
www.dTathaesheMeAt4Xu.9co7m65/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. Patented click-and-pop
suppression eliminates audible transients on power and
shutdown 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
Purchase of I2C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associated Companies, conveys a
license under the Philips I2C Patent Rights to use these compo-
nents in an I2C system, provided that the system conforms to the
I2C Standard Specification defined by Philips.
Features
♦ 750mW BTL Stereo Speaker Amplifier
♦ 65mW Stereo Headphone Amplifier
♦ 2.7V to 5.5V Single-Supply Operation
♦ Patented 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
MAX9765ETJ
MAX9766ETJ
MAX9767ETJ
TEMP RANGE
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
PIN-PACKAGE
32 Thin QFN-EP*
32 Thin QFN-EP*
32 Thin QFN-EP*
*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.
1 page  
750mW Audio Amplifiers with Headphone Amp,
Microphone Preamp, and Input Mux
ELECTRICAL CHARACTERISTICS (continued)
www.da(VtaDsDhe=etP4VuD.cDom= 3.0V, GND = 0, HPS = MUTE = GND, SHDN = 3V, CBIAS = 1µF, RIN = RF = 15kΩ, RL = ∞. TA = TMIN to TMAX, unless
otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
HEADPHONE SENSE INPUT (HPS)
Input Voltage High
VIH
CONDITIONS
Input Voltage Low
VIL
Input Leakage Current
IIN
2-WIRE SERIAL INTERFACE (SCL, SDA, ADD) (MAX9765/MAX9766)
Input Voltage High
Input Voltage Low
Input Hysteresis
VIH
VDD > 3.6V
VDD ≤ 3.6V
VIL
Input High Leakage Current
IIH VIN = 3V
Input Low Leakage Current
IIL VIN = 0V
Input Capacitance
CIN
Output Voltage Low
VOL IOL = 3mA
Output Current High
IOH VOH = 3V
TIMING CHARACTERISTICS (MAX9765/MAX9766)
Serial Clock Frequency
fSCL
Bus Free Time Between STOP
and START Conditions
tBUF
START Condition Hold Time
START Condition Setup Time
Clock Period Low
Clock Period High
Data Setup Time
Data Hold Time
tHD:STA
tSU:STA
tLOW
tHIGH
tSU:DAT
tHD:DAT
(Note 3)
Receive SCL/SDA Rise Time
tR (Note 4)
Receive SCL/SDA Fall Time
tF (Note 4)
Transmit SDA Fall Time
Pulse Width of Suppressed Spike
tF (Note 4)
tSP (Note 5)
MIN TYP MAX UNITS
0.9 x
VDD
0.7 x
VDD
±1
3
2
0.8
0.2
±1
±1
10
0.4
1
V
V
µA
V
V
V
µA
µA
pF
V
µA
400 kHz
1.3 µs
0.6 µs
0.6 µs
1.3 µs
0.6 µs
100 ns
0 0.9 µs
20 +
0.1CB
300 ns
20 +
0.1CB
300 ns
20 +
0.1CB
250 ns
50 ns
Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: POUT limits are tested by a combination of electrical and guaranteed by design.
Note 3: A device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s falling edge.
Note 4: CB = total capacitance of one of the bus lines in picofarads. Device tested with CB = 400pF. 1kΩ pullup resistors connected
from SDA/SCL to VDD.
Note 5: Input filters on SDA, SCL, and ADD suppress noise spikes less than 50ns.
_______________________________________________________________________________________ 5
5 Page 
750mW Audio Amplifiers with Headphone Amp,
Microphone Preamp, and Input Mux
Typical Operating Characteristics (continued)
www.da(VtaDsDhe=etP4VuD.cDom= 5V, BW = 22Hz to 22kHz, TA = +25°C, unless otherwise noted.)
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)
140
VCC = 3V
120
100
80 THD+ N = 10%
60
40 THD+N = 1%
20
0
1 10 100 1k 10k
LOAD RESISTANCE (Ω)
OUTPUT POWER vs. TEMPERATURE
(HEADPHONE MODE)
100
THD+N = 10%
80
THD+N = 1%
60
40
20
f = 1kHz
RL = 16Ω
0
-40 -15
10 35
TEMPERATURE (°C)
60
85
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (HEADPHONE MODE)
0
-10 VDD = 3V
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
100 1k 10k
FREQUENCY (Hz)
100k
POWER DISSIPATION vs. OUTPUT POWER
(HEADPHONE MODE)
140
120 RL = 16Ω
100
80
RL = 32Ω
60
40
20 VDD = 5V
f = 1kHz
0
0 25 50 75
OUTPUT POWER (mW)
100
OUTPUT POWER vs. TEMPERATURE
(HEADPHONE MODE)
60
THD+N = 10%
50
40
THD+N = 1%
30
20
10 f = 1kHz
RL = 32Ω
0
-40 -15
10 35
TEMPERATURE (°C)
60
85
ENTERING SHUTDOWN (HEADPHONE MODE)
MAX9765 toc51
SHDN
2V/div
POWER DISSIPATION vs. OUTPUT POWER
(HEADPHONE MODE)
60
RL = 16Ω
50
40
RL = 32Ω
30
20
10 VDD = 3V
f = 1kHz
0
0 15
30 45
OUTPUT POWER (mW)
60
75
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (HEADPHONE MODE)
0
-10 VDD = 5V
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
100 1k 10k
FREQUENCY (Hz)
100k
EXITING SHUTDOWN (HEADPHONE MODE)
MAX9765 toc52
SHDN
2V/div
OUT_+
500mV/div
HP JACK
100mV/div
200ms/div
RL = 16Ω
INPUT AC-COUPLED TO GND
OUT_+
500mV/div
HP JACK
100mV/div
200ms/div
RL = 16Ω
INPUT AC-COUPLED TO GND
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX9766.PDF ] | |
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