MAX9765ETJ+ Maxim Integrated Products, MAX9765ETJ+ Datasheet

IC AMP AUDIO .75W STER AB 32TQFN

MAX9765ETJ+

Manufacturer Part Number
MAX9765ETJ+
Description
IC AMP AUDIO .75W STER AB 32TQFN
Manufacturer
Maxim Integrated Products
Type
Class ABr
Datasheet
1.MAX9766ETJ.pdf (33 pages)

Specifications of MAX9765ETJ+

Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
750mW x 2 @ 4 Ohm; 65mW x 2 @ 16 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
Depop, I²C, Input Multiplexer, Microphone, Mute, Short-Circuit and Thermal Protection, Shutdown
Mounting Type
Surface Mount
Package / Case
32-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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 I
mono speaker playback applications and includes a
mono BTL speaker amp, stereo headphone amp, differ-
ential output mic amp, input MUX, and I
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 I
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
thermal-overload protection (OVP) and are specified
over the extended -40°C to +85°C temperature range.
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.
19-2862; Rev 2; 3/07
PDA Audio Systems
Tablet PCs
Cell Phones
✕
0.8mm). All devices have short-circuit and
750mW Audio Amplifiers with Headphone Amp,
2
C control. The MAX9766 is targeted at
________________________________________________________________ Maxim Integrated Products
General Description
Notebooks
Digital Cameras
Microphone Preamp, and Input Mux
Applications
2
C control. The
2
C-
✕
♦ 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, I
♦ Small 32-Pin Thin QFN (5mm
*EP = Exposed paddle.
Pin Configurations and Functional Diagrams appear at end of data
sheet.
MAX9765ETJ
MAX9766ETJ
MAX9767ETJ
Interface
Package
PART
CONTROL
MICBIAS
DEVICE
MICIN+
MICIN-
AUXIN
INR1
INR2
INL1
INL2
MUX
MUX
TEMP RANGE
-40
-40
-40
CONTROL
BIAS
o
o
o
C to +85
C to +85
C to +85
2
C-Compatible, or Parallel
Ordering Information
MAX9765
Simplified Diagram
MUX
o
o
o
C
C
C
PIN-
PACKAGE
32 TQFN-EP*
32 TQFN-EP*
32 TQFN-EP*
✕
5mm
SPKR
LEFT
SPKR
RIGHT
MICOUT
✕
Features
0.8mm)
HEADPHONE
T3255-4
T3255-4
T3255-4
CODE
PKG
1

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MAX9765ETJ+ Summary of contents

Page 1

... PDA Audio Systems Notebooks Tablet PCs Digital Cameras Cell Phones ________________________________________________________________ Maxim Integrated Products 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. Microphone Preamp, and Input Mux ♦ 750mW BTL Stereo Speaker Amplifier ♦ ...

Page 2

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................................+ GND .........................................................................+ .........................................................................-0. .......................................................................±0. PGND to GND.....................................................................±0.3V All ...

Page 3

Audio Amplifiers with Headphone Amp, ELECTRICAL CHARACTERISTICS (continued) = 3.0V, GND = 0, HPS = MUTE = GND, SHDN = 3V otherwise noted. Typical values are at T PARAMETER SYMBOL Maximum Capacitive Load ...

Page 4

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ELECTRICAL CHARACTERISTICS (continued) = 3.0V, GND = 0, HPS = MUTE = GND, SHDN = 3V otherwise noted. Typical values are at T ...

Page 5

Audio Amplifiers with Headphone Amp, ELECTRICAL CHARACTERISTICS (continued) = 3.0V, GND = 0, HPS = MUTE = GND, SHDN = 3V otherwise noted. Typical values are at T PARAMETER SYMBOL HEADPHONE SENSE INPUT ...

Page 6

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ( 5V 22Hz to 22kHz TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (SPEAKER MODE 100mW P = 250mW ...

Page 7

Audio Amplifiers with Headphone Amp 5V 22Hz to 22kHz TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (SPEAKER MODE) 100 1kHz R =4Ω L ...

Page 8

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ( 5V 22Hz to 22kHz POWER DISSIPATION vs. OUTPUT POWER (SPEAKER MODE) 1.6 1.4 1.2 1.0 0.8 0.6 0 ...

Page 9

Audio Amplifiers with Headphone Amp 5V 22Hz to 22kHz EXITING SHUTDOWN (SPEAKER MODE) SHDN OUT_+ AND OUT OUT_+ - OUT 200ms/div R = 8Ω L INPUT AC-COUPLED TO GND C ...

Page 10

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ( 5V 22Hz to 22kHz TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (HEADPHONE MODE ...

Page 11

Audio Amplifiers with Headphone Amp 5V 22Hz to 22kHz OUTPUT POWER vs. LOAD RESISTANCE (HEADPHONE MODE) 140 120 100 80 THD 10% 60 THD+N ...

Page 12

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ( 5V 22Hz to 22kHz ENTERING POWER-DOWN (HEADPHONE MODE) MAX9765 toc53 V CC 2V/div OUT_+ 500mV/div HP JACK 100mV/div 200ms/div R ...

Page 13

Audio Amplifiers with Headphone Amp 5V 22Hz to 22kHz DIFFERENTIAL MICROPHONE AMPLIFIER LARGE-SIGNAL TRANSIENT RESPONSE MAX9765 toc62 IN 500mV/div OUT 1V/div 200µs/div A = 4dB 1kHz IN ...

Page 14

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux ( 5V 22Hz to 22kHz SINGLE-ENDED MICROPHONE AMPLIFIER SMALL-SIGNAL TRANSIENT RESPONSE IN 50mV/div OUT 100mV/div 200µs/div A = 10dB V f ...

Page 15

Audio Amplifiers with Headphone Amp, PIN 18, 23, 24, ...

Page 16

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux PIN — — 23 — — — 9 — ...

Page 17

Audio Amplifiers with Headphone Amp, 15kΩ AUDIO INPUT 30kΩ Figure 1. Using the Input Multiplexer for Gain Setting selects input IN_1 and a logic high selects input IN_2. Both right- and left-channel multiplexers are controlled by the same input. ...

Page 18

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux mode, this waveform shapes the frequency spectrum, minimizing the amount of audible components present at the headphone. In speaker mode, the BTL amplifiers start up in the same fashion ...

Page 19

Audio Amplifiers with Headphone Amp, SDA t SU, DAT t LOW SCL t HIGH t HD, STA t R START CONDITION Figure 3. 2-Wire Serial Interface Timing Diagram condition, the bus remains active. When a STOP con- dition or ...

Page 20

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux SCL SDA STOP START LEGAL STOP CONDITION SCL SDA START ILLEGAL STOP ILLEGAL EARLY STOP CONDITION Figure 5. Early STOP Condition Figure 6. ...

Page 21

Audio Amplifiers with Headphone Amp, Table 4. SHDN Register Format REGISTER ADDRESS BIT NAME VALUE 0* 7 RESET RESET RESET RESET RESET RESET 1 ...

Page 22

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux Table 6. Microphone Gain Setting MG2 MG1 MG0 *Default state. The MAX9765/MAX9766 are ...

Page 23

Audio Amplifiers with Headphone Amp, Table 7. Status Register Format REGISTER ADDRESS BIT NAME 7 THRM 6 AMPR- 5 AMPR+ 4 AMPL- 3 AMPL+ 2 HPSTS Improved PSRR. ● Higher ground noise immunity. ● Microphone ...

Page 24

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux section. For example, θ of the QFN package is JA +42°C/W. The increase in power delivered by the BTL configura- tion directly results in an increase in internal power ...

Page 25

Audio Amplifiers with Headphone Amp, Output-Coupling Capacitor The MAX9765/MAX9766/MAX9767 require output-cou- pling capacitors to operate in single-ended (head- phone) mode. The output-coupling capacitor blocks the DC component of the amplifier output, preventing DC current from flowing to the load. ...

Page 26

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux 1µF 0.47µF 15kΩ 0.47µF 15kΩ HPF CODEC 0.47µF 15kΩ 0.47µF 15kΩ HPF MICROCONTROLLER *C IS ONLY REQUIRED IF LOW CLICK-AND-POP LEVELS ARE NECESSARY DURING POWER-DOWN. SVDD 26 ______________________________________________________________________________________ 0.1µF ...

Page 27

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux 0.47µF 15kΩ AUDIO INL1 INPUT INL2 AUDIO INPUT 15kΩ 0.47µF BIAS 1µF 0.47µF 15kΩ AUDIO INR1 INPUT INR2 AUDIO INPUT 15kΩ 0.47µF SHDN SCL SDA ADD 0.1µF AUXIN 2.2kΩ ...

Page 28

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux 0.47µF 15kΩ AUDIO INL1 INPUT INL2 AUDIO INPUT 15kΩ 0.47µF BIAS 1µF 0.47µF 15kΩ AUDIO INR1 INPUT INR2 AUDIO INPUT 15kΩ 0.47µF SHDN SCL SDA 0.1µF AUXIN 2.2kΩ MICBIAS ...

Page 29

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux 0.1µF 15kΩ INL AUDIO INPUT 0.1µF PV 0.1µF SHDN MUTE INTEXT 0.47µF 15kΩ INR AUDIO INPUT 0.1µF AUXIN 2.2kΩ MICBIAS 1µF 2.2kΩ 0.1µF MICIN+ MICIN- ...

Page 30

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux SHDN 1 N.C. 2 OUTL MAX9765 PGND 5 OUTL- 6 N.C. 7 INL2 ...

Page 31

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux CONTROL PART INTERFACE 2 MAX9765 I C compatible 2 MAX9766 I C compatible MAX9767 Parallel ______________________________________________________________________________________ SPEAKER INPUT AMPLIFIER MULTIPLEXER ✓ Stereo ✓ Mono Stereo — MAX9765 TRANSISTOR COUNT: ...

Page 32

Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 32 ______________________________________________________________________________________ Package Information ...

Page 33

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 33 © 2007 Maxim Integrated Products ...

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