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| 型号： | MAX9720AEBE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO .05W STER AB 16UCSP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | DirectDrive®, SmartSense™ |
| 类型： | AB 类 |
| 输出类型： | 耳机，2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 50mW x 2 @ 32 欧姆 |
| 电源电压： | 1.8 V ~ 3.6 V |
| 特点： | 消除爆音，短路保护和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 16-UCSP（2x2） |
| 封装/外壳： | 16-WFBGA，CSPBGA |
| 包装： | 带卷 (TR) |
General Description
The MAX9720 stereo headphone amplifier combines
Maxim’s DirectDrive architecture and SmartSense, an
automatic mono/stereo detection feature. Conventional
headphone amplifiers require a bulky DC-blocking
capacitor between the headphone and the amplifier.
DirectDrive produces a ground-referenced output from
a single supply, eliminating the need for large DC-
blocking capacitors, saving cost, board space, and
component height.
SmartSense automatically detects the presence of a
short at either the left or right amplifier output. Under a
fault condition, the shorted output is automatically dis-
abled and the stereo input signal is automatically mixed
and routed to the remaining active channel. This feature
is useful in cell phone and PDA applications where a
variety of headphone jacks with unknown loads can be
inserted into the headphone jack socket. SmartSense
prevents both damage to the amplifier and eliminates
battery drain into a shorted load.
The MAX9720 delivers up to 50mW per channel into a
16Ω load and has an ultra-low 0.003% THD+N. A high
(92dB at 217kHz) power-supply rejection ratio (PSRR)
allows the device to operate from noisy digital supplies
without additional power conditioning. The gain of the
MAX9720 is set internally, further reducing component
count. Two gain options are available (-1V/V, MAX9720A
and -1.41V/V, MAX9720B). The headphone outputs
include a comprehensive click-and-pop circuitry that
eliminates audible glitches on startup and shutdown. A
shutdown mode provides a fast 250s turn-on time.
The MAX9720 operates from a single 1.8V to 3.6V
supply and consumes only 5mA of supply current. The
MAX9720 also features thermal overload protection,
and is specified over the extended -40°C to +85°C tem-
perature range. The MAX9720 is available in a tiny
(2mm x 2mm x 0.6mm) 16-bump chip-scale package
(UCSP) and a 16-pin TSSOP package.
Applications
Features
DirectDrive Eliminates Bulky DC-Blocking
Capacitors
SmartSense Automatic Short Detection
Low 5mA Quiescent Current
Fixed Gain Eliminates External Feedback Network
MAX9720A: -1V/V
MAX9720B: -1.41V/V
50mW per Channel Output Power
Ultra-Low 0.003% THD+N
High PSRR (92dB at 217Hz)
Integrated Click-and-Pop Suppression
1.8V to 3.6V Single-Supply Operation
Thermal Overload Protection
Available in Space-Saving Packages
16-Bump UCSP (2mm x 2mm x 0.6mm)
16-Pin TSSOP
MAX9720
50mW, DirectDrive, Stereo Headphone
Amplifier with SmartSense and Shutdown
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-2859; Rev 0; 4/03
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.
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
GAIN
(V/V)
MAX9720AEBE-T
-40
oC to +85oC
16 UCSP-16
-1
MAX9720BEBE-T
-40
oC to +85oC
16 UCSP-16
-1.41
MAX9720AEUE
-40
oC to +85oC
16 TSSOP
-1
MAX9720BEUE
-40
oC to +85oC
16 TSSOP
-1.41
PDAs
Cellular Phones
MP3 Players
Notebook PCs
Smart Phones
Tablet PCs
Portable Audio Equipment
SmartSense and UCSP are trademarks of Maxim Integrated
Products, Inc.
RIN
+
LIN
ROUT
HPS
MODE1
MODE2
ALERT
3.6V TO 1.8V
SUPPLY
MAX9720
SmartSense
LOUT
Simplified Block Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9720AEUE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9720AEUE+ | 功能描述:音频放大器 50mW DirectDrive Headphone Amplifier 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 |
| MAX9720AEUE+T | 功能描述:音频放大器 50mW DirectDrive Headphone Amplifier 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 |
| MAX9720BEBE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9720BEBE+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.05W CLS-AB 16UCSP - Rail/Tube |
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