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參數資料
| 型號： | MAX9725BETC |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown |
| 中文描述： | 0.025 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC12 |
| 封裝： | 4 X 4 MM, 0.80 MM HEIGHT, MO-220-WGGB, TQFN-12 |
| 文件頁數： | 1/14頁 |
| 文件大?。?/td> | 425K |
| 代理商： | MAX9725BETC |
General Description
The MAX9725 fixed-gain, stereo headphone amplifier
is ideal for portable equipment where board space is at a
premium. The MAX9725 uses a unique, patented
DirectDrive
TM
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 MAX9725 delivers up to 20mW per channel into a
32
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 0.6μA (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
Smart Phones
Portable Audio Equipment
Features
Low Quiescent Current (2.1mA)
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
Ground-Referenced Outputs Eliminate DC Bias
No Degradation of Low-Frequency Response Due
to Output Capacitors
20mW per Channel into 32
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)
M
1V, Low-Power, DirectDrive, Stereo Headphone
Amplifier with 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
19-3465; Rev 0; 11/04
Ordering Information
PA RT
T EM P R AN G E
PIN-
PA CK A G E
T O P
M A RK
AC K
AAEW
AC L
AAEX
AC M
AAEY
AC N
AAEZ
G A N
( V/V)
- 2
- 2
- 1.5
- 1.5
- 1
- 1
- 4
- 4
MAX9725AEBC T*
M AX9725AE TC
MAX9725BEBC T*
M AX9725BE TC
MAX9725CEBC-T*
M AX9725C E TC
MAX9725D EBC T*
M AX9725D E TC
- 40
°
C to + 85
°
C 12 U C S P- 12
- 40
°
C to + 85
°
C 12 TQFN- EP**
- 40
°
C to + 85
°
C 12 U C S P- 12
- 40
°
C to + 85
°
C 12 TQFN- EP**
- 40
°
C to + 85
°
C 12 U C S P- 12
- 40
°
C to + 85
°
C 12 TQFN- EP**
- 40
°
C to + 85
°
C 12 U C S P- 12
- 40
°
C to + 85
°
C 12 TQFN- EP**
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
*
Future product—contact factory for availability.
**
EP = Exposed paddle.
MP3 Players
Cellular Phones
PDAs
DirectDrive OUTPUTS
ELIMINATE DC-BLOCKING
CAPACITORS.
C1N
C1P
OUTL
SINGLE
1.5V CELL
AA OR AAA
BATTERY
OUTR
SGND
PGND
MAX9725
INVERTING
CHARGE PUMP
INR
INL
V
DD
PV
SS
V
SS
Block Diagram
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9725BETC+ | 功能描述:音頻放大器 1V 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 |
| MAX9725BETC+T | 功能描述:音頻放大器 1V 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 |
| MAX9725BETC-T | 功能描述:音頻放大器 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 |
| 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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