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| 型号： | SSM2305RMZ-R2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 2.8W MONO D 8MSOP |
| 标准包装： | 250 |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 2.8W x 1 @ 4 欧姆 |
| 电源电压： | 2.2 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，短路和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 8-MSOP |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
Filterless High Efficiency
Mono 2.8 W Class-D Audio Amplifier
SSM2305
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2008 Analog Devices, Inc. All rights reserved.
FEATURES
Filterless Class-D amplifier with Σ-Δ modulation
No sync necessary when using multiple Class-D amplifiers
from Analog Devices, Inc.
2.8 W into 4 Ω load and 1.6 W into 8 Ω load at 5.0 V supply
with <10% total harmonic distortion (THD)
89% efficiency at 5.0 V, 1.3 W into 8 Ω speaker
>98 dB signal-to-noise ratio (SNR)
Single-supply operation from 2.5 V to 5.5 V
20 nA ultralow shutdown current
Short-circuit and thermal protection
Available in 8-lead, 3 mm × 3 mm LFCSP and MSOP
Pop-and-click suppression
Built-in resistors reduce board component count
Fixed and user-adjustable gain configurations
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys
GENERAL DESCRIPTION
The SSM2305 is a fully integrated, high efficiency, Class-D
audio amplifier designed to maximize performance for mobile
phone applications. The application circuit requires a minimum
of external components and operates from a single 2.5 V to 5.5 V
supply. It is capable of delivering 2.2 W of continuous output
power with less than 1% THD + N driving a 4 Ω load from a
5.0 V supply. It has built-in thermal shutdown and output short-
circuit protection.
The SSM2305 features a high efficiency, low noise modulation
scheme that does not require external LC output filters. The modu-
lation provides high efficiency even at low output power. The
SSM2305 operates with 90% efficiency at 1.3 W into 8 Ω or 83%
efficiency at 2.2 W into 4 Ω from a 5.0 V supply and has an SNR of
>98 dB. Spread-spectrum pulse density modulation is used to
provide lower EMI-radiated emissions compared with other
Class-D architectures.
The SSM2305 has a micropower shutdown mode with a maximum
shutdown current of 30 nA. Shutdown is enabled by applying
a Logic 0 to the SD pin. The device also includes pop-and-click
suppression circuitry. This minimizes voltage glitches at the
output during turn-on and turn-off, thus reducing audible noise
on activation and deactivation.
The fully differential input of the SSM2305 provides excellent
rejection of common-mode noise on the input. Input coupling
capacitors can be omitted if the dc input common-mode voltage
is approximately VDD/2.
The SSM2305 has excellent rejection of power supply noise,
including noise caused by GSM transmission bursts and RF
rectification. PSRR is typically 60 dB at 217 Hz.
The default gain of the SSM2305 is 18 dB, but users can reduce the
gain by using a pair of external resistors.
The SSM2305 is specified over the commercial temperature range
(40°C to +85°C). It is available in both an 8-lead, 3 mm ×
3 mm lead frame chip scale package (LFCSP) and an 8-lead
mini small outline package (MSOP).
FUNCTIONAL BLOCK DIAGRAM
07
243
-00
1
SHUTDOWN
0.1F
VDD
POP/CLICK
SUPPRESSION
OUT+
OUT–
IN+
VBATT
2.5V TO 5.5V
IN–
MODULATOR
(Σ-Δ)
GND
10F
47nF*
*INPUT CAPACITORS ARE OPTIONAL IF INPUT DC COMMON-MODE VOLTAGE IS
APPROXIMATELY VDD/2.
47nF*
SD
AUDIO IN–
AUDIO IN+
SSM2305
37k
296k
37k
FET
DRIVER
BIAS
INTERNAL
OSCILLATOR
Figure 1.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SSM2305RMZ-REEL | 功能描述:IC AMP AUDIO 2.8W MONO D 8MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 标准包装:2,000 系列:- 类型:AB 类 输出类型:2 通道（立体声） 在某负载时最大输出功率 x 通道数量:- 电源电压:4 V ~ 18 V 特点:- 安装类型:通孔 供应商设备封装:8-DIP 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 |
| SSM2305RMZ-REEL7 | 功能描述:IC AMP AUDIO 2.8W MONO D 8MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 标准包装:1 系列:- 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:30mW x 2 @ 32 欧姆 电源电压:2.7 V ~ 5.5 V 特点:3D，低音提升，无噪音，热保护，关断 安装类型:表面贴装 供应商设备封装:20-QFN（3x3） 封装/外壳:20-WFQFN 裸露焊盘 包装:Digi-Reel® 其它名称:706-1163-6 |
| SSM2306 | 制造商:AD 制造商全称:Analog Devices 功能描述:2 W, Filterless, Class-D Stereo Audio Amplifier |
| SSM2306A | 制造商:SECOS 制造商全称:SeCoS Halbleitertechnologie GmbH 功能描述:N-Channel Enhancement Mode Power Mos.FET |
| SSM2306CPZ-R2 | 功能描述:IC AMP AUDIO 2.4W STER D 16LFCSP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:D 类 输出类型:1-通道（单声道），带立体声耳机 在某负载时最大输出功率 x 通道数量:930mW x 1 @ 8 欧姆; 40mW x 2 @ 16 欧姆 电源电压:2.7 V ~ 5.5 V 特点:消除爆音，差分输入，I²C，静音，关闭，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) 其它名称:MAX97000EWA+T-ND |
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