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MAX9789BETJ+

Description
Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
CategoryAnalog mixed-signal IC    Consumption circuit   
File Size499KB,28 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX9789BETJ+ Overview

Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers

MAX9789BETJ+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFN
package instructionHVQCCN, LCC32,.2SQ,20
Contacts32
Reach Compliance Codecompli
ECCN codeEAR99
Nominal bandwidth20 kHz
Commercial integrated circuit typesAUDIO AMPLIFIER
Gain21.6 dB
JESD-30 codeS-XQCC-N32
JESD-609 codee3
length5 mm
Humidity sensitivity level1
Number of channels2
Number of functions1
Number of terminals32
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Nominal output power2 W
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC32,.2SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
power supply5 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum slew rate40 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)4.5 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width5 mm
19-0606; Rev 3; 9/09
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
General Description
The MAX9789/MAX9790 combine a stereo, 2W Class AB
speaker power amplifier with a stereo 100mW
DirectDrive
®
headphone amplifier in a single device. The
MAX9789/MAX9790 are designed for use with the
Microsoft Windows Vista
®
operating system and are fully
compliant with Microsoft’s Windows Vista specifications.
The headphone amplifier features Maxim’s patented
DirectDrive architecture that produces a ground-refer-
enced 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-distor-
tion amplification 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.
Features
o
Microsoft Windows Vista Compliant
o
Class AB 2W Stereo BTL Speaker Amplifier
o
100mW DirectDrive Headphone Amplifier
Eliminates Costly, Bulky DC-Blocking Capacitors
o
Excellent RF Immunity
o
Integrated 120mA LDO (MAX9789)
o
High +90dB PSRR, Low 0.002% THD+N
o
Low-Power Shutdown Mode
o
Click-and-Pop Suppression
o
Short-Circuit and Thermal-Overload Protection
o
Available in 32-Pin Thin QFN (5mm x 5mm x
0.8mm) Package
MAX9789/MAX9790
Ordering Information
PART
MAX9789AETJ+
MAX9789CETJ+
MAX9790AETJ+
PIN-PACKAGE INTERNAL LDO t
ON
(ms)
32 TQFN-EP*
Yes
100
Yes
Yes
No
25
100
100
32 TQFN-EP*
32 TQFN-EP*
MAX9789BETJ+** 32 TQFN-EP*
MAX9790BETJ+** 32 TQFN-EP*
No
25
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.
Simplified Block Diagrams
SPEAKER SUPPLY
4.5V TO 5.5V
HEADPHONE SUPPLY
3.0V TO 5.5V
SPKR_INR
Applications
Notebook Computers
Tablet PCs
Portable Multimedia Players
Pin Configurations appear at end of data sheet.
U.S. Patent # 7,061,327.
MAX9789
SPKR_INL
HP_INR
HP_INL
SPKR_EN
HP_EN
MUTE
GAIN1
GAIN2
4.5V TO 5.5V
LDO
1.21V TO 4.75V
Windows Vista is a registered trademark of Microsoft Corp.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
Simplified Block Diagrams continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.

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