MAX9789AETJ+ Maxim Integrated Products, MAX9789AETJ+ Datasheet

MAX9789AETJ+

Manufacturer Part Number

MAX9789AETJ+

Description

IC AMP AUDIO 2W STER AB 32TQFN

Manufacturer

Maxim Integrated Products

Series

DirectDrive™r

Type

Class ABr

Datasheet

1.MAX9789AETJ.pdf (28 pages)

Specifications of MAX9789AETJ+

Output Type

2-Channel (Stereo) with Stereo Headphones

Max Output Power X Channels @ Load

2W x 2 @ 4 Ohm; 100mW x 2 @ 16 Ohm

Voltage - Supply

4.5 V ~ 5.5 V

Features

Depop, Mute, Short-Circuit and Thermal Protection, Shutdown

Mounting Type

Surface Mount

Package / Case

32-TQFN Exposed Pad

Product

Class-AB

Output Power

2 W

Thd Plus Noise

0.004 %

Supply Current

0.1 mA

Maximum Power Dissipation

1990 mW

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Audio Load Resistance

4 Ohms

Minimum Operating Temperature

- 40 C

Amplifier Class

No. Of Channels

Supply Voltage Range

4.5V To 5.5V

Load Impedance

4ohm

Operating Temperature Range

-40Â°C To +85Â°C

Amplifier Case Style

TQFN

Rohs Compliant

Yes

For Use With

MAX9789AEVKIT+ - EVALUATION KIT FOR MAX9789A

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Download datasheet (524Kb)

The MAX9789/MAX9790 combine a stereo, 2W Class AB

speaker power amplifier with a stereo 100mW

DirectDrive

MAX9789/MAX9790 are designed for use with the

Microsoft Windows Vista

compliant with Microsoft’s Windows Vista specifications.

The headphone amplifier features Maxim’s DirectDrive

architecture that produces a ground-referenced output

from a single supply to eliminate the need for large DC-

blocking capacitors, as well as save cost, board space,

and component height. A high +90dB PSRR and low

0.002% THD+N ensures clean, low-distortion amplifica-

tion of the audio signal.

Separate speaker and headphone amplifier control

inputs provide independent shutdown of the speaker

and headphone amplifiers, allowing speaker and head-

phone amplifiers to be active simultaneously, if

required. The industry-leading click-and-pop suppres-

sion circuitry reduces audible transients during startup

and shutdown cycles.

The MAX9789 features an internal LDO that can be used

as a clean power supply for a CODEC or other circuits.

The LDO output voltage is set internally at 4.75V or can

be adjusted between 1.21V and 4.75V using a simple

resistive divider. The LDO is protected against thermal

overloads and short circuits while providing 120mA of

continuous output current and can be enabled indepen-

dently of the audio amplifiers.

By disabling the speaker and headphone amplifiers, and

the LDO (for MAX9789), the MAX9789/MAX9790 enter

low-power shutdown mode and draw only 0.3µA.

The MAX9789/MAX9790 operate from a single 4.5V to

5.5V supply and feature thermal-overload and output

short-circuit protection. Devices are specified over the

-40°C to +85°C extended temperature range.

19-0606; Rev 3; 9/09

Windows Vista-Compliant, Stereo Class AB Speaker

Pin Configurations appear at end of data sheet.

Windows Vista is a registered trademark of Microsoft Corp.

DirectDrive is a registered trademark of Maxim Integrated

Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Amplifiers and DirectDrive Headphone Amplifiers

Notebook Computers

Tablet PCs

Portable Multimedia Players

headphone amplifier in a single device. The

________________________________________________________________ Maxim Integrated Products

General Description

operating system and are fully

Applications

♦ Microsoft Windows Vista Compliant

♦ Class AB 2W Stereo BTL Speaker Amplifier

♦ 100mW DirectDrive Headphone Amplifier

♦ Excellent RF Immunity

♦ Integrated 120mA LDO (MAX9789)

♦ High +90dB PSRR, Low 0.002% THD+N

♦ Low-Power Shutdown Mode

♦ Click-and-Pop Suppression

♦ Short-Circuit and Thermal-Overload Protection

♦ Available in 32-Pin Thin QFN (5mm x 5mm x

Note: All devices are specified over the -40°C to +85°C extended

temperature range.

+ Denotes a lead-free/RoHS-compliant package.

* EP = Exposed pad.

** Future product—contact factory for availability.

MAX9789AETJ+

MAX9789BETJ+** 32 TQFN-EP*

MAX9789CETJ+

MAX9790AETJ+

MAX9790BETJ+** 32 TQFN-EP*

Simplified Block Diagrams continued at end of data sheet.

Eliminates Costly, Bulky DC-Blocking Capacitors

0.8mm) Package

PART

4.5V TO 5.5V

SPKR_INR

SPKR_INL

HP_INR

HP_INL

Simplified Block Diagrams

SPEAKER SUPPLY

SPKR_EN

MUTE

4.5V TO 5.5V

HP_EN

GAIN1

GAIN2

PIN-PACKAGE INTERNAL LDO t

32 TQFN-EP*

MAX9789

Ordering Information

HEADPHONE SUPPLY

LDO

3.0V TO 5.5V

1.21V TO 4.75V

Yes

Features

100

(ms)

Related parts for MAX9789AETJ+

MAX9789AETJ+ Summary of contents

Page 1

... Low-Power Shutdown Mode ♦ Click-and-Pop Suppression ♦ Short-Circuit and Thermal-Overload Protection ♦ Available in 32-Pin Thin QFN (5mm x 5mm x 0.8mm) Package PART MAX9789AETJ+ MAX9789BETJ+** 32 TQFN-EP* MAX9789CETJ+ MAX9790AETJ+ MAX9790BETJ+** 32 TQFN-EP* Note: All devices are specified over the -40°C to +85°C extended temperature range. ...

Page 2

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage ( HPV , CPV to GND) ..................................................-0.3V to +6.0V DD GND to PGND, CPGND ......................................................±0.3V CPV , C1N, ...

Page 3

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued CPV = HPV = HP_EN = (MAX9789 only) = 0V, I (MAX9789 only ...

Page 4

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued CPV = HPV = HP_EN = (MAX9789 only) = 0V, I (MAX9789 only ...

Page 5

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued CPV = HPV = HP_EN = (MAX9789 only) = 0V, I (MAX9789 only ...

Page 6

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers ( CPV = HPV = LDO_EN = +5V ∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (A unless otherwise ...

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Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers PIN NAME MAX9789 MAX9790 1 — LDO_SET 2 2 SPKR_INR Right-Channel Speaker Amplifier Input 3 3 SPKR_INL Left-Channel Speaker Amplifier Input 4 — LDO_EN PGND ...

Page 14

... FS = 0.300V ) RMS Headphone output crosstalk Note: THD+N, DYNAMIC RANGE, and CROSSTALK should be measured in accordance with AES-17 audio measurements standards. Dual Mode is a trademark of Maxim Integrated Products, Inc. 14 ______________________________________________________________________________________ tional headphone amplifiers to conserve board space and system cost, as well as improve low-frequency response. ...

Page 15

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers The output voltage is set by the following equation LDO OUT _ LDO SET _ where V = 1.21V. LDO_SET To simplify resistor selection: ⎛ V ...

Page 16

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers LOW-FREQUENCY ROLLOFF (R = 16Ω DirectDrive -6 -9 330μF -12 220μF -15 100μF -18 -21 33μF -24 -27 - 100 1k FREQUENCY (Hz) Figure ...

Page 17

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers Speaker and Headphone Amplifier Enable The MAX9789/MAX9790 feature control inputs for the independent enabling of the speaker and headphone amplifiers, allowing both to be active simultaneously if required. Driving ...

Page 18

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers Mono Speaker Configuration The MAX9789 stereo BTL Class AB speaker amplifier can be configured to drive a mono speaker. Rather than combining the CODEC’s left- and right-input sig- nals ...

Page 19

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers Headphone Amplifier Power-Supply Input (HPV The headphone amplifiers are powered from HPV and PV . HPV is the positive supply of the head phone amplifiers and ranges ...

Page 20

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers Output Capacitor (C2) The output capacitor value and ESR directly affect the ripple at CPV . Increasing the value of C2 reduces SS output ripple. Likewise, decreasing the ESR ...

Page 21

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers 4.5V TO 5.5V 1.0µF 1.0µF 0.1µF 1.0µF SPKR_INL 1.0µF SPKR_INR 1.0µF HP_INL 27 1.0µF HP_INR 5.5V HP_EN 22 MUTE 25 SPKR_EN 23 GAIN2 32 GAIN1 31 ...

Page 22

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers 1.0μF SPKR_INL 3 1.0μF SPKR_INR 2 1.0μF HP_INL 27 1.0μF HP_INR 5.5V HP_EN 22 MUTE 25 SPKR_EN 23 GAIN2 32 GAIN1 31 LOGIC PINS CONFIGURED FOR: ...

Page 23

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers 0.1μF 1μF V LDO_OUT SPKR_L SPKR_R HDA CODEC HP_R HP_L 5.0V MONO DGND AGND C 1μF μC ______________________________________________________________________________________ 5.0V 5.0V C 1μF BULK V PV HPV DD DD BIAS ...

Page 24

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers V LDO_OUT SPKR_L SPKR_R HDA CODEC HP1_R HP1_L HP2_R HP2_L DGND AGND 24 ______________________________________________________________________________________ System Diagrams (continued) +5V 1μF 1μF 0.1μ 1μF SPKR_INL 1μF SPKR_INR ...

Page 25

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers TOP VIEW MUTE 25 HP_INR 26 27 HP_INL 28 GND MAX9789 29 LDO_OUT GAIN1 + 32 GAIN2 ...

Page 26

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings ...

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... 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. 28 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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