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参数资料
型号： MAX9789BETJ+T
厂商： Maxim Integrated Products
文件页数： 1/28页
文件大小： 0K
描述： IC AMP AUDIO 2W STER AB 32TQFN
产品培训模块： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装： 2,500
系列： DirectDrive®
类型： AB 类
输出类型： 2-通道（立体声）带立体声耳机
在某负载时最大输出功率 x 通道数量： 2W x 2 @ 4 欧姆; 100mW x 2 @ 16 欧姆
电源电压： 4.5 V ~ 5.5 V
特点： 消除爆音，静音，短路保护和热保护，关机
安装类型： 表面贴装
供应商设备封装： 32-TQFN-EP（5x5）
封装/外壳： 32-WFQFN 裸露焊盘
包装： 带卷 (TR)
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-0606; Rev 3; 9/09
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.
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 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 0.3A.
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
Applications
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.
PART
PIN-PACKAGE INTERNAL LDO tON (ms)
MAX9789AETJ+
32 TQFN-EP*
Yes
100
MAX9789BETJ+** 32 TQFN-EP*
Yes
25
MAX9789CETJ+
32 TQFN-EP*
Yes
100
MAX9790AETJ+
32 TQFN-EP*
No
100
MAX9790BETJ+** 32 TQFN-EP*
No
25
Simplified Block Diagrams
MAX9789
SPKR_EN
HP_EN
MUTE
GAIN1
GAIN2
SPEAKER SUPPLY
4.5V TO 5.5V
HEADPHONE SUPPLY
3.0V TO 5.5V
LDO
4.5V TO 5.5V
SPKR_INR
SPKR_INL
HP_INR
HP_INL
1.21V TO 4.75V
Microsoft Windows Vista Compliant
Class AB 2W Stereo BTL Speaker Amplifier
100mW DirectDrive Headphone Amplifier
Eliminates Costly, Bulky DC-Blocking Capacitors
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
0.8mm) Package
Notebook Computers
Tablet PCs
Portable Multimedia Players
Windows Vista is a registered trademark of Microsoft Corp.
Pin Configurations appear at end of data sheet.
Simplified Block Diagrams continued at end of data sheet.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
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参数描述
MAX9789CETJ+ 功能描述:音频放大器 Windows Vista Class AB Speaker Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
MAX9789CETJ+T 功能描述:音频放大器 Windows Vista Class AB Speaker Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
MAX978EEE 功能描述:校验器 IC Quad High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel
MAX978EEE+ 功能描述:校验器 IC Quad High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel
MAX978EEE+T 功能描述:校验器 IC Quad High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel
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