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參數(shù)資料
| 型號： | MAX9720 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 50mW, DirectDrive, Stereo Headphone Amplifier with SmartSense and Shutdown |
| 中文描述： | 50mW、DirectDrive®、立體聲耳機放大器，帶有SmartSense™和關斷 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 508K |
| 代理商： | MAX9720 |
General Description
The MAX9720 stereo headphone amplifier combines
Maxim’s patented DirectDrive architecture and
SmartSense, an automatic mono/stereo detection fea-
ture. Conventional headphone amplifiers require a bulky
DC-blocking capacitor between the headphone and the
amplifier. DirectDrive produces a ground-referenced out-
put 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
16
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 250μs 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
o
DirectDrive Eliminates Bulky DC-Blocking
Capacitors
o
SmartSense Automatic Short Detection
o
Low 5mA Quiescent Current
o
Fixed Gain Eliminates External Feedback Network
MAX9720A: -1V/V
MAX9720B: -1.41V/V
o
50mW per Channel Output Power
o
Ultra-Low 0.003% THD+N
o
High PSRR (92dB at 217Hz)
o
Integrated Click-and-Pop Suppression
o
1.8V to 3.6V Single-Supply Operation
o
Thermal Overload Protection
o
Available in Space-Saving Packages
16-Bump UCSP (2mm x 2mm x 0.6mm)
16-Pin TSSOP
M
50mW, DirectDrive, Stereo Headphone
Amplifier with SmartSense and Shutdown
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
19-2859; Rev 0; 4/03
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
GAIN
(V/V)
MAX9720AEBE-T
MAX9720BEBE-T
MAX9720AEUE
MAX9720BEUE
-40
o
C to +85
o
C
-40
o
C to +85
o
C
-40
o
C to +85
o
C
-40
o
C to +85
o
C
16 UCSP-16
16 UCSP-16
16 TSSOP
16 TSSOP
-1
-1.41
-1
-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.
R
IN
+
L
IN
R
OUT
HPS
MODE1
MODE2
ALERT
3.6V TO 1.8V
SUPPLY
MAX9720
SmartSense
L
OUT
Simplified Block Diagram
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| MAX9720BEUE | 50mW, DirectDrive, Stereo Headphone Amplifier with SmartSense and Shutdown |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX97200AEVKIT+ | 功能描述:音頻 IC 開發(fā)工具 MAX97200A Eval Kit RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX97200AEWC+ | 制造商:Maxim Integrated Products 功能描述:HIGH EFFICIENCY HEADPHONE AMPLIFIER - Rail/Tube |
| MAX97200AEWC+T | 功能描述:音頻放大器 Class H DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX97200BEWC+T | 功能描述:音頻放大器 Class H DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9720AEBE | 制造商:Maxim Integrated Products 功能描述:50MW, DIRECTDRIVE, STEREO HEADPHONE AMPLIFIER - Rail/Tube |
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