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| 型号： | MAX9725BETC+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO .025W STER 12TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 系列： | DirectDrive® |
| 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： | 25mW x 2 @ 16 欧姆 |
| 电源电压： | 900 mV ~ 1.8 V |
| 特点： | 消除爆音，短路保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 12-TQFN-EP（4x4） |
| 封装/外壳： | 12-WQFN 裸露焊盘 |
| 包装： | 管件 |
DirectDrive OUTPUTS
ELIMINATE DC-BLOCKING
CAPACITORS.
C1N
C1P
OUTL
SINGLE
1.5V CELL
AA OR AAA
BATTERY
OUTR
SGND
PGND
MAX9725A–MAX9725D
INVERTING
CHARGE PUMP
INR
INL
VDD
PVSS
C2
VSS
C3
General Description
The MAX9725A–MAX9725D fixed-gain, stereo head-
phone amplifiers are ideal for portable equipment where
board space is at a premium. The MAX9725E offers the
flexibility to adjust the gain with external input and feed-
back resistors. The MAX9725A–MAX9725E use a unique
DirectDrive architecture to produce a ground-referenced
output from a single supply, eliminating the need for large
DC-blocking capacitors, saving cost, board space, and
component height. Fixed gains of -2V/V (MAX9725A),
-1.5V/V (MAX9725B), -1V/V (MAX9725C), and -4V/V
(MAX9725D) further reduce external component count.
The adjustable gain of the MAX9725E DirectDrive head-
phone amplifier allows for any gain down to -1V/V using
external resistors.
The MAX9725 delivers up to 20mW per channel into a
32Ω load and achieves 0.006% THD+N. An 80dB at 1kHz
power-supply rejection ratio (PSRR) allows the MAX9725
to operate from noisy digital supplies without an additional
linear regulator. The MAX9725 includes
±8kV ESD protec-
tion on the headphone output. Comprehensive click-and-
pop circuitry suppresses audible clicks and pops at
startup and shutdown. A low-power shutdown mode
reduces supply current to 0.6A (typ).
The MAX9725 operates from a single 0.9V to 1.8V supply,
allowing the device to be powered directly from a single
AA or AAA battery. The MAX9725 consumes only
2.1mA of supply current, provides short-circuit protection,
and is specified over the extended -40
°C to +85°C tem-
perature range. The MAX9725 is available in a tiny
(1.54mm x 2.02mm x 0.6mm) 12-bump chip-scale
package (UCSP) and a 12-pin thin QFN package
(4mm x 4mm x 0.8mm).
Applications
Features
Low Quiescent Current
2.1mA (MAX9725A–MAX9725D)
2.3mA (MAX9725E)
Single-Cell, 0.9V to 1.8V Single-Supply Operation
Fixed Gain Eliminates External Feedback Network
MAX9725A: -2V/V
MAX9725B: -1.5V/V
MAX9725C: -1V/V
MAX9725D: -4V/V
Adjustable Gain with External Input and Feedback
Resistors
MAX9725E: Minimum Stable Gain of -1V/V
Ground-Referenced Outputs Eliminate DC Bias
No Degradation of Low-Frequency Response Due
to Output Capacitors
20mW per Channel into 32Ω
Low 0.006% THD+N
High PSRR (80dB at 1kHz)
Integrated Click-and-Pop Suppression
Low-Power Shutdown Control
Short-Circuit Protection
±8kV ESD-Protected Amplifier Outputs
Available in Space-Saving Packages
12-Bump UCSP (1.54mm x 2.02mm x 0.6mm)
12-Pin Thin QFN (4mm x 4mm x 0.8mm)
MAX9725
1V, Low-Power, DirectDrive, Stereo Headphone
Amplifier with Shutdown
________________________________________________________________
Maxim Integrated Products
1
19-3465; Rev 4; 3/09
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.
EVALUATION
KIT
AVAILABLE
Ordering Information
PART
PIN-PACKAGE
TOP
MARK
GAIN
(V/V)
MAX9725AEBC+TG45
12 UCSP+ACK
-2
MAX9725AETC+
12 TQFN-EP*
+AAEW
-2
MAX9725BEBC+TG45
12 UCSP+ACL
-1.5
UCSP is a trademark of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet.
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*
EP = Exposed pad.
Pin Configurations appear at end of data sheet.
Block Diagrams continued at end of data sheet.
MP3 Players
Cellular Phones
PDAs
Smart Phones
Portable Audio Equipment
Block Diagrams
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| MAX9725CETC+ | IC AMP AUDIO .025W STER 12TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9725BETC+ | 功能描述:音频放大器 1V 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 |
| MAX9725BETC+T | 功能描述:音频放大器 1V 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 |
| MAX9725BETC-T | 功能描述:音频放大器 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 |
| MAX9725CEBC | 制造商:Maxim Integrated Products 功能描述:1V LOW-POWER DIRECTDRIVE STEREO - Rail/Tube |
| MAX9725CEBC+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.025W CLS-AB 12UCSP - Rail/Tube |
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