MAX9765ETJ MAXIM [Maxim Integrated Products], MAX9765ETJ Datasheet

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MAX9765ETJ

Manufacturer Part Number
MAX9765ETJ
Description
750mW Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1.MAX9765ETJ.pdf (32 pages)
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. 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 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.
19-2862; Rev 1; 2/05
Purchase of I
Inc., or one of its sublicensed Associated Companies, conveys a
license under the Philips I
nents in an I
I
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.
2
C Standard Specification defined by Philips.
PDA Audio Systems
Tablet PCs
Cell Phones
✕
0.8mm). All devices have short-circuit and
750mW Audio Amplifiers with Headphone Amp,
2
C system, provided that the system conforms to the
2
2
C components from Maxim Integrated Products,
C control. The MAX9766 is targeted at
________________________________________________________________ Maxim Integrated Products
2
General Description
C Patent Rights to use these compo-
Notebooks
Digital Cameras
Applications
Microphone Preamp, and Input Mux
2
C control. The
2
C-
✕
♦ 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, 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
CONTROL
PART
MICBIAS
DEVICE
MICIN+
MICIN-
AUXIN
INL1
INL2
INR1
INR2
MUX
MUX
CONTROL
BIAS
TEMP RANGE
-40
-40
-40
2
MAX9765
C-Compatible, or Parallel
o
o
o
Ordering Information
C to +85
C to +85
C to +85
Simplified Diagram
MUX
o
o
o
C
C
C
✕
5mm
PIN-PACKAGE
32 Thin QFN-EP*
32 Thin QFN-EP*
32 Thin QFN-EP*
SPKR
LEFT
SPKR
RIGHT
MICOUT
✕
Features
0.8mm)
HEADPHONE
1

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MAX9765ETJ Summary of contents

Page 1

... C control. The ♦ MUTE Function ♦ Headphone Sense Input ♦ Stereo 2:1 Input Multiplexer ♦ Optional 2-Wire, I Interface ♦ Small 32-Pin Thin QFN (5mm Package PART MAX9765ETJ MAX9766ETJ MAX9767ETJ *EP = Exposed paddle. Pin Configurations and Functional Diagrams appear at end of data sheet INL1 ...

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 headphone mode, this waveform shapes the frequency spectrum, minimizing the amount of audible compo- nents present at the headphone. In speaker mode, the BTL amplifiers start up in the ...

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 www.maxim-ic.com/packages.) D MARKING XXXXX PIN # 1 ...

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