MAX9789AETJ+ Maxim Integrated Products, MAX9789AETJ+ Datasheet

IC AMP AUDIO 2W STER AB 32TQFN

MAX9789AETJ+

Manufacturer Part Number
MAX9789AETJ+
Description
IC AMP AUDIO 2W STER AB 32TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Datasheet

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
AB
No. Of Channels
3
Supply Voltage Range
4.5V To 5.5V
Load Impedance
4ohm
Operating Temperature Range
-40°C To +85°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
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*
32 TQFN-EP*
32 TQFN-EP*
MAX9789
Ordering Information
HEADPHONE SUPPLY
LDO
3.0V TO 5.5V
1.21V TO 4.75V
Yes
Yes
Yes
No
No
Features
ON
100
100
100
25
25
(ms)
1

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 ...

Page 7

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 ...

Page 8

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 ...

Page 9

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 ...

Page 10

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 ...

Page 11

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 ...

Page 12

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 ...

Page 13

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 ...

Page 27

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 ...

Page 28

... 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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