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參數資料
| 型號： | MAX9770EUI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.2W Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers |
| 中文描述： | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| 封裝： | 4.40 MM, MO-153AE, TSSOP-28 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 493K |
| 代理商： | MAX9770EUI |
General Desc ription
The MAX9770 combines a mono, filterless, Class D
speaker amplifier and stereo DirectDrive headphone
amplifiers in a single device. The MAX9770 operates
from a single 2.5V to 5.5V supply and includes features
that reduce external component count, system cost,
board space, and offer improved audio reproduction.
The speaker amplifier makes use of Maxim’s patented
Class D architecture, providing Class AB performance
with Class D efficiency, conserving board space, and
extending battery life. The speaker amplifier delivers
1.2W into an 8
load while offering efficiencies above
85%. A spread-spectrum scheme reduces radiated
emissions caused by the modulation frequency.
Furthermore, the MAX9770 oscillator can be synchro-
nized to an external clock through the SYNC input,
avoiding possible problem frequencies inside a system.
The speaker amplifier features a low 0.025% THD+N,
high 70dB PSRR, and SNR in excess of 90dB.
The headphone amplifiers feature Maxim’s patented
DirectDrive architecture that produces a ground-refer-
enced output from a single supply, eliminating the need
for large DC-blocking capacitors. The headphone ampli-
fiers deliver up to 80mW into a 16
load, feature low
0.015% THD+N, high 80dB PSRR, and
±
8kV ESD-pro-
tected outputs. A headphone sense input detects the
presence of a headphone, and automatically configures
the amplifiers for either speaker or headphone mode.
The MAX9770 includes internally set, logic-selectable
gain, and a comprehensive input multiplexer/mixer, allow-
ing multiple audio sources to be selected and for true
mono reproduction of a stereo source in speaker mode.
Industry-leading click-and-pop suppression eliminates
audible transients during power and shutdown cycles. A
low-power shutdown mode decreases supply current
consumption to 0.1μA, further extending battery life.
The MAX9770 is offered in space-saving, thermally effi-
cient 28-pin TQFN (5mm x 5mm x 0.8mm) and 28-pin
TSSOP packages. The MAX9770 features thermal-over-
load and output short-circuit protection, and is specified
over the extended -40°C to +85°C temperature range.
Applic ations
Cellular Phones
PDAs
Compact Notebooks
Features
1.2W Filterless Class D Amplifier Passes FCC
Class B Radiated Emissions Standards with
100mm of Cable
Unique Spread-Spectrum Mode Offers 5dB
Emissions Improvement Over Conventional
Methods
80mW DirectDrive Headphone Amplifier
Eliminates Bulky DC-Blocking Capacitors
High 80dB PSRR at 217Hz
85% Efficiency
Low 0.015% THD+N
Industry-Leading Click-and-Pop Suppression
Integrated 3-Way Input Mixer/Multiplexer
Logic-Selectable Gain
Short-Circuit and Thermal Protection
±
8kV ESD-Protected Headphone Outputs
Low-Power Shutdown Mode
Available in Space-Saving, Thermally Efficient
Packages
28-Pin TQFN (5mm x 5mm x 0.8mm)
28-Pin TSSOP
Ordering Information
M
1.2W Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
________________________________________________________________
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
SPKR
(MONO)
MAX9770
CLASS
D
V
DD
DirectDrive
STEREO
HEADPHONE
L1IN
L2IN
R1IN
R2IN
MONO
GAIN SEL
INPUT SEL
MUTE
SHDN
HPS
PART
TEMP RANGE
-40
o
C to +85
o
C
-40
o
C to +85
o
C
PIN-PACKAGE
28 TQFN-EP*
28 TSSOP
MAX9770ETI
MAX9770EUI
Lead-free package.
*
EP = Exposed paddle.
S implified Bloc k Diagram
19-3134; Rev 0; 5/04
Pin Configuration appears at end of data sheet.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9770EUI+ | 功能描述:音頻放大器 1.2W Low-EMI Class D 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 |
| MAX9770EUI+T | 功能描述:音頻放大器 1.2W Low-EMI Class D 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 |
| MAX9770EVKIT | 功能描述:音頻 IC 開發(fā)工具 Programmers, Development Systems 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 |
| MAX9772EBA | 制造商:Maxim Integrated Products 功能描述:1.2WLOW-EMIFILTERLESSMONO CLASS - Rail/Tube |
| MAX9772EBA-T | 制造商:Maxim Integrated Products 功能描述:1.2W,LOW-EMI,FILTERLESS,MONO CLASS D AMP. W S - Tape and Reel |
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