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參數資料
| 型號： | SSM2305CPZ-R2 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/16頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 2.8W MONO D 8LFCSP |
| 標準包裝： | 1 |
| 類型： | D 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負載時最大輸出功率 x 通道數量： | 2.8W x 1 @ 4 歐姆 |
| 電源電壓： | 2.2 V ~ 5.5 V |
| 特點： | 消除爆音，差分輸入，短路和熱保護，關閉 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 8-LFCSP-VD（3x3） |
| 封裝/外殼： | 8-VFDFN 裸露焊盤，CSP |
| 包裝： | 標準包裝 |
| 其它名稱： | SSM2305CPZ-R2DKR |
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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相關代理商/技術參數 |
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| SSM2305CPZ-REEL | 功能描述:IC AMP AUDIO 2.8W MONO D 8LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 標準包裝:2,000 系列:- 類型:AB 類 輸出類型:2 通道（立體聲） 在某負載時最大輸出功率 x 通道數量:- 電源電壓:4 V ~ 18 V 特點:- 安裝類型:通孔 供應商設備封裝:8-DIP 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 |
| SSM2305CPZ-REEL7 | 功能描述:IC AMP AUDIO 2.8W MONO D 8LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:D 類 輸出類型:1-通道（單聲道），帶立體聲耳機 在某負載時最大輸出功率 x 通道數量:930mW x 1 @ 8 歐姆; 40mW x 2 @ 16 歐姆 電源電壓:2.7 V ~ 5.5 V 特點:消除爆音，差分輸入，I²C，靜音，關閉，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) 其它名稱:MAX97000EWA+T-ND |
| SSM2305-EVALZ | 功能描述:BOARD EVAL FOR SSM2305 LFCSP RoHS:是 類別:編程器，開發系統 >> 評估板 - 音頻放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| SSM2305GN | 制造商:SSC 制造商全稱:Silicon Standard Corp. 功能描述:P-channel Enhancement-mode Power MOSFET |
| SSM2305RMZ-R2 | 功能描述:IC AMP AUDIO 2.8W MONO D 8MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:D 類 輸出類型:1-通道（單聲道），帶立體聲耳機 在某負載時最大輸出功率 x 通道數量:930mW x 1 @ 8 歐姆; 40mW x 2 @ 16 歐姆 電源電壓:2.7 V ~ 5.5 V 特點:消除爆音，差分輸入，I²C，靜音，關閉，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) 其它名稱:MAX97000EWA+T-ND |
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