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參數資料
| 型號： | MAX9722B |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 5V. Differential-Input. DirectDrive. 130mW Stereo Headphone Amplifiers with Shutdown |
| 中文描述： | 5V、差分輸入、DirectDrive、130mW立體聲耳機放大器，帶有關斷 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 537K |
| 代理商： | MAX9722B |
General Description
The MAX9712 mono class D audio power amplifier pro-
vides class AB amplifier performance with class D effi-
ciency, conserving board space, and extending battery
life. Using a class D architecture, the MAX9712 delivers
up to 500mW into an 8
load while offering efficiencies
above 85%. A patented, low EMI modulation scheme
renders the traditional class D output filter unnecessary.
The MAX9712 offers two modulation schemes: a fixed-
frequency (FFM) mode, and a spread-spectrum (SSM)
mode that reduces EMI-radiated emissions due to the
modulation frequency. Furthermore, the MAX9712 oscil-
lator can be synchronized to an external clock through
the SYNC input, allowing the switching frequency to be
user defined. The SYNC input also allows multiple
MAX9712s to be cascaded and frequency locked, mini-
mizing interference due to clock intermodulation. The
device utilizes a fully differential architecture, a full-
bridged output, and comprehensive click-and-pop sup-
pression. The gain is internally set to +4V/V, further
reducing external component count.
The MAX9712 features high 72dB PSRR, a low 0.01%
THD+N, and SNR in excess of 90dB. Short-circuit and
thermal-overload protection prevent the device from
damage during a fault condition. The MAX9712 is avail-
able in 10-pin TDFN (3mm
3mm
0.8mm), 10-pin
μMAX, and 12-bump UCSP (1.5mm
2mm
0.6mm)
packages. The MAX9712 is specified over the extended
-40°C to +85°C temperature range.
Applications
Features
Filterless Amplifier Passes FCC Radiated
Emissions Standards with 100mm of Cable
Unique Spread-Spectrum Mode Offers 5dB
Emissions Improvement Over Conventional
Methods
Optional External SYNC Input
Simple Master-Slave Setup for Stereo Operation
85% Efficiency
Up to 500mW into 8
Low 0.01% THD+N
High PSRR (72dB at 217Hz)
Integrated Click-and-Pop Suppression
Low Quiescent Current (4mA)
Low-Power Shutdown Mode (0.1μA)
Short-Circuit and Thermal-Overload Protection
Available in Thermally Efficient, Space-Saving
Packages
10-Pin TDFN (3mm
3mm
0.8mm)
10-Pin μMAX
12-Bump UCSP (1.5mm
2mm
0.6mm)
M
500mW, Low EMI, Filterless,
Class D Audio Amplifier
________________________________________________________________
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
1
2
3
4
5
10
9
8
7
6
PV
DD
OUT-
OUT+
PGND
GND
IN-
IN+
V
DD
MAX9712
TDFN/
μ
MAX
TOP VIEW
SYNC
SHDN
Pin Configurations
Ordering Information
MAX9712
DIFFERENTIAL
AUDIO INPUT
SYNC
INPUT
V
DD
OSCILLATOR
MODULATOR
AND H-BRIDGE
Simplified Block Diagram
19-2917; Rev 1; 1/04
Cellular Phones
PDAs
MP3 Players
Portable Audio
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
TOP
MARK
MAX9712ETB
MAX9712EUB
MAX9712EBC-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
10 TDFN
10 μMAX
12 UCSP-12
AAI
—
ABN
Pin Configurations continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9722BETE | 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 |
| MAX9722BETE+ | 功能描述:音頻放大器 DirectDrive 130mW 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 |
| MAX9722BETE+G104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9722BETE+T | 功能描述:音頻放大器 DirectDrive 130mW 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 |
| MAX9722BETE+WG104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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