max9761 Maxim Integrated Products, Inc., max9761 Datasheet

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max9761

Manufacturer Part Number
max9761
Description
Stereo 3w Audio Power Amplifiers With Headphone Drive And Input Mux
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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The MAX9760–MAX9763 family combines a stereo or
mono 3W bridge-tied load (BTL) audio power amplifier,
stereo single-ended headphone amplifier, headphone
sensing, and a 2:1 input multiplexer all in a tiny 28-pin
thin QFN package. These devices operate from a sin-
gle 4.5V to 5.5V supply and feature an industry-leading
100dB PSRR, allowing these devices to operate from
noisy supplies without the addition of a linear regulator.
An ultra-low 0.002% THD+N ensures clean, low-distor-
tion amplification of the audio signal. Patented click-
and-pop suppression eliminates audible transients on
power and shutdown cycles. Power-saving features
include low 4mV V
through the speakers), low 13mA supply current, and a
10µA shutdown mode. A MUTE function allows the out-
puts to be quickly enabled or disabled.
A headphone sense input detects the presence of a
headphone jack and automatically configures the
amplifiers for either speaker or headphone mode. In
speaker mode, the amplifiers can deliver up to 3W of
continuous average power into a 3Ω load. In head-
phone mode, the amplifier can deliver up to 200mW of
continuous average power into a 16Ω load. The gain of
the amplifiers is externally set, allowing maximum flexi-
bility in optimizing output levels for a given load. The
amplifiers also feature a 2:1 input multiplexer, allowing
multiple audio sources to be selected. The multiplexer
can also be used to compensate for limitations in the
frequency response of the loud speakers by selecting
an external equalizer network. The various functions are
controlled by either an I
control interface.
The MAX9760–MAX9763 are available in either a ther-
mally efficient 28-pin thin QFN package (5mm
0.8mm) or a TSSOP-EP package. All devices have ther-
mal overload protection (OVP) and are specified over
the extended -40°C to +85°C temperature range.
19-2744; Rev 0; 1/03
Pin Configurations and Functional Diagrams appear at end
of data sheet.
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.
Notebooks
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________________________________________________________________ Maxim Integrated Products
OS
Stereo 3W Audio Power Amplifiers with
General Description
2
C-compatible or simple parallel
(minimizes DC current drain
Applications
Headphone Drive and Input Mux
5mm
o Industry-Leading, Ultra-High 100dB PSRR
o PC99/01 Compliant
o 3W BTL Stereo Speaker Amplifier
o 200mW Stereo Headphone Amplifier
o Low 0.002% THD+N
o Patented Click-and-Pop Suppression
o ESD-Protected Outputs
o Low Quiescent Current: 13mA
o Low-Power Shutdown Mode: 10µA
o MUTE Function
o Headphone Sense Input
o Stereo 2:1 Input Multiplexer
o Optional 2-Wire, I
o Tiny 28-Pin Thin QFN (5mm
*EP = Exposed paddle.
Ordering Information continued at end of data sheet.
MAX9760ETI
MAX9760EUI
CONTROL
RIGHT IN
RIGHT IN
Interface
TSSOP-EP Packages
LEFT IN
LEFT IN
PART
1
2
1
2
Simplified Block Diagram
COMPATIBLE
BTL
SE/
I
2
C-
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
SINGLE SUPPLY
2
4.5V TO 5.5V
C-Compatible or Parallel
Ordering Information
MAX9760
5mm
PIN-PACKAGE
28 Thin QFN-EP*
28 TSSOP-EP*
Features
0.8mm) and
1

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max9761 Summary of contents

Page 1

Rev 0; 1/03 Stereo 3W Audio Power Amplifiers with General Description The MAX9760–MAX9763 family combines a stereo or mono 3W bridge-tied load (BTL) audio power amplifier, stereo single-ended headphone amplifier, headphone sensing, and a 2:1 input multiplexer all in ...

Page 2

... Storage Temperature Range .............................-65°C to +150°C + 0.3V) Junction Temperature ......................................................+150°C DD Lead Temperature (soldering, 10s) .................................+300°C = 1µ 15kΩ, R BIAS IN F CONDITIONS Inferred from PSRR test DD MAX9760/MAX9761 BTL mode, HPS = 0V MAX9762/MAX9763 Single-ended mode, HPS = V DD SHDN = GND Gain or input switching C = 1µF BIAS C = 0.1µF BIAS ...

Page 3

Stereo 3W Audio Power Amplifiers with ELECTRICAL CHARACTERISTICS (continued) = 5.0V, GND = PGND = 0V, SHDN = 5V noted. Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL OUTPUT AMPLIFIERS ...

Page 4

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ELECTRICAL CHARACTERISTICS (continued) = 5.0V, GND = PGND = 0V, SHDN = 5V noted. Typical values are +25°C.) (Note 1) ...

Page 5

Stereo 3W Audio Power Amplifiers with ( 5V +25°C, unless otherwise noted TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (SPEAKER MODE 3Ω 2V/V V 0.1 P ...

Page 6

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ( 5V +25°C, unless otherwise noted TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (SPEAKER MODE) 100 A = 4V/V V ...

Page 7

Stereo 3W Audio Power Amplifiers with ( 5V +25°C, unless otherwise noted POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (SPEAKER MODE 200mV RIPPLE P 100 10 ...

Page 8

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ( 5V +25°C, unless otherwise noted TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (HEADPHONE MODE 16Ω ...

Page 9

Stereo 3W Audio Power Amplifiers with ( 5V +25°C, unless otherwise noted OUTPUT POWER vs. LOAD RESISTANCE (HEADPHONE MODE) 600 f = 1kHz 500 THD+N = 10% 400 300 200 THD+N = ...

Page 10

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ( 5V +25°C, unless otherwise noted ENTERING POWER-DOWN (HEADPHONE MODE OUT_+ HP JACK 100ms/div R = 16Ω L INPUT ...

Page 11

... Stereo 3W Audio Power Amplifiers with PIN MAX9760 MAX9761 QFN TSSOP QFN TSSOP 1 26 — — — — 13, 6, 10, 9, 13, 6, 10, 20, 23, 27 20 11, 25 ...

Page 12

... BTL/headphone amplifiers. The MAX9762/ MAX9763 are mono BTL/stereo headphone amplifiers. The MAX9760/MAX9762 are controlled through an I compatible, 2-wire serial interface. The MAX9761/ MAX9763 are controlled through five logic inputs: MUTE, SHDN, HPS_EN, GAINA/B, and IN1/2 (see Selector Guide). The MAX9760–MAX9763 feature ...

Page 13

... MAX9760–MAX9763 family. Connecting the audio source to the device through two different input resis- tors (Figure 1) increases the number of gain options from two to four (MAX9760/MAX9761) and from three to six (MAX9762/MAX9763). Additionally, the input multi- plexer allows a speaker equalization network to be switched into the speaker signal path. This is typically useful in optimizing acoustic response from speakers with small physical dimensions ...

Page 14

... MUTE register (see the Command Byte Definitions section). The left and right channels can be independently muted. MAX9761/MAX9763 MUTE The MAX9761/MAX9763 feature an active-high MUTE input that mutes both channels. Click-and-Pop Suppression The MAX9760–MAX9763 feature Maxim’s patented comprehensive click-and-pop suppression. During ...

Page 15

Stereo 3W Audio Power Amplifiers with SDA t SU, DAT t LOW SCL t HIGH t HD, STA t R START CONDITION Figure 3. 2-Wire Serial Interface Timing Diagram The clickless power-down cycle only occurs when the device is in ...

Page 16

Stereo 3W Audio Power Amplifiers with Headphone Drive 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 17

Stereo 3W Audio Power Amplifiers with S ADDRESS 7 BITS SLAVE ADDRESS. SELECTS DEVICE. S ADDRESS 7 BITS SLAVE ADDRESS. SELECTS DEVICE. Figure 7. Write/Read Data Format Example 2 Table Slave ...

Page 18

... In read mode (R/W = 1), the MAX9760/MAX9762 write the contents of the selected register to the bus. The direction of the data flow reverses following the address acknowledge by the MAX9760/MAX9761. The master device reads the contents of all registers, including the read-only status register. the status register format. ...

Page 19

Stereo 3W Audio Power Amplifiers with Table 6. Status Register Format REGISTER ADDRESS BIT NAME 7 THRM 6 AMPR- 5 AMPR+ 4 AMPL- 3 AMPL+ 2 HPSTS When the MAX9760/MAX9762 are configured to auto- matically detect ...

Page 20

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux Component Selection Gain-Setting Resistors External feedback components set the gain of the MAX9760–MAX9763. Resistor R sets the gain of the IN input amplifier (A ) and resistor R VIN ...

Page 21

... BIAS Figure 9. Bass Boost Circuit depending on the status of the gain control input. The stereo MAX9760/MAX9761 feature two gain options per channel. The mono MAX9762/MAX9763 feature two gain options per single-ended channel, and a single gain option for the mono speaker amplifier (see Tables 1a and 1b for the gain-setting options) ...

Page 22

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux AUX_IN OUT BIAS MAX4060 CODEC IN+ IN- MICROCONTROLLER 22 ______________________________________________________________________________________ Typical Application Circuit V DD 0.1µ 0.047µF BIAS SV DD 1µF GAINLB GAINLA 15kΩ OUTL+ ...

Page 23

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux PV DD AUDIO INL1 2:1 INPUT INPUT INL2 AUDIO MUX INPUT BIAS BIAS AUDIO INR1 2:1 INPUT INPUT INR2 AUDIO MUX INPUT SHDN SCL SDA LOGIC ADD INT MAX9760 ...

Page 24

... DD DD GAIN Ω 10k SET MUX 2:1 Ω 10k INPUT MUX Ω 10k BIAS Ω 10k GAIN Ω 10k SET MUX 2:1 Ω 10k INPUT MUX Ω 10k Ω 10k LOGIC HPS MAX9761 GND GAINLB GAINLA OUTL+ OUTL- GAINRB GAINRA OUTR+ OUTR- HPS ...

Page 25

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux INR1 2:1 MIXER INPUT INR2 MUX BIAS BIAS INL1 2:1 INPUT INL2 MUX SHDN SCL SDA LOGIC ADD INT MAX9762 ______________________________________________________________________________________ Functional Diagrams (continued) SV ...

Page 26

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux INR1 INR2 BIAS INL1 INL2 SHDN HP_EN MUTE IN1/IN2 GAINA/B 26 ______________________________________________________________________________________ Functional Diagrams (continued Ω 10k 2:1 MIXER 10k INPUT MUX BIAS ...

Page 27

... GND MAX9761 17 BIAS 16 HPS 15 GAINA/B THIN QFN INL1 2 27 HPS_EN INL2 3 26 MUTE 4 25 IN/1V2 5 24 PGND MAX9761 PGND 6 23 OUTR- OUTL OUTR+ DD OUTL PGND PGND 10 19 GAINRB SHDN 11 18 GAINRA 12 17 INR2 HPS ...

Page 28

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux TOP VIEW SDA 1 INT MAX9762 5 INL1 6 INL2 GAINLA 7 THIN QFN INL1 2 INL2 3 GAINLA ...

Page 29

... MAX9762 I C Compatible MAX9763 Parallel ______________________________________________________________________________________ Headphone Drive and Input Mux MAX9760 TRANSISTOR COUNT: 5256 PIN-PACKAGE MAX9761 TRANSISTOR COUNT: 2715 28 Thin QFN-EP* MAX9762 TRANSISTOR COUNT: 5046 28 TSSOP-EP* MAX9763 TRANSISTOR COUNT: 2505 28 Thin QFN-EP* PROCESS: BiCMOS 28 TSSOP-EP* 28 Thin QFN-EP* 28 TSSOP-EP* SPEAKER AMPLIFIER ...

Page 30

Stereo 3W Audio Power Amplifiers with Headphone Drive 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 PIN # 1 I.D. C ...

Page 31

Stereo 3W Audio Power Amplifiers with (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.) Maxim cannot assume responsibility for use of any circuitry other than ...

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