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| 型號： | SSM2356CBZ-RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUD 2X2W STER D 16WLCSP |
| 產(chǎn)品變化通告： | 8mm Carrier Tape Changes 28/Feb/2012 |
| 標準包裝： | 1 |
| 類型： | D 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(shù)量： | 2.5W x 2 @ 4 歐姆 |
| 電源電壓： | 2.5 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： | 16-WLCSP |
| 封裝/外殼： | 16-WFBGA，WLCSP |
| 包裝： | 標準包裝 |
| 其它名稱： | SSM2356CBZ-RL7DKR |
2 × 2W Filterless Class-D
Stereo Audio Amplifier
Data Sheet
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
2009–2013 Analog Devices, Inc. All rights reserved.
FEATURES
Filterless stereo Class-D amplifier with Σ-Δ modulation
No sync necessary when using multiple Class-D amplifiers
from Analog Devices, Inc.
2 × 2W into 4 load and 2x1.4 W into 8 load at 5.0 V
supply with <1% total harmonic distortion (THD + N)
92% efficiency at 5.0 V, 1.4 W into 8 speaker
>103 dB signal-to-noise ratio (SNR)
Single-supply operation from 2.5 V to 5.5 V
20 nA shutdown current; left/right channel control
Short-circuit and thermal protection
Available in a 16-ball, 1.66 mm × 1.66 mm WLCSP
Pop-and-click suppression
Built-in resistors that reduce board component count
User-selectable 6 dB or 18 dB gain setting
User-selectable ultralow EMI emission mode
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
GENERAL DESCRIPTION
The SSM2356 is a fully integrated, high efficiency, stereo Class-D
audio amplifier. It is 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 × 2W of contin-
uous output power with <1% THD + N driving a 4 load from a
5.0 V supply.
The SSM2356 features a high efficiency, low noise modulation
scheme that requires no external LC output filters. The modulation
continues to provide high efficiency even at low output power.
It operates with 92% efficiency at 1.4 W into 8 or 85% efficiency
at 2.0 W into 4 from a 5.0 V supply and has an SNR of >103 dB.
Spread-spectrum pulse density modulation is used to provide
lower EMI-radiated emissions compared with other Class-D
architectures. The SSM2356 includes an optional modulation
select pin (ultralow EMI emission mode) that significantly
reduces the radiated emissions at the Class-D outputs, particularly
above 100 MHz.
The SSM2356 has a micropower shutdown mode with a typical
shutdown current of 20 nA. Shutdown is enabled by applying
a logic low to the SDNR and SDNL pins. The device also
includes pop-and-click suppression circuitry that minimizes
voltage glitches at the output during turn-on and turn-off,
reducing audible noise on activation and deactivation.
The fully differential input of the SSM2356 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 preset gain of SSM2356 can be
selected between 6 dB and 18 dB with no external components
and no change to the input impedance. Gain can be further
reduced to a user-defined setting by inserting series external
resistors at the inputs.
The SSM2356 is specified over the commercial temperature range
(40°C to +85°C). It has built-in thermal shutdown and output
short-circuit protection. It is available in a 16-ball, 1.66 mm ×
1.66 mm wafer level chip scale package (WLCSP).
FUNCTIONAL BLOCK DIAGRAM
FET
DRIVER
MODULATOR
(Σ-Δ)
0.1F
VDD
OUTR+
OUTR–
OUTL+
OUTL–
BIAS
FET
DRIVER
MODULATOR
(Σ-Δ)
EDGE
INR+
VBATT
2.5V TO 5.5V
INR–
INL+
INL–
INTERNAL
OSCILLATOR
EDGE
CONTROL
GND
10F
22nF1
1 INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE
VOLTAGE IS APPROXIMATELY VDD/2.
22nF1
80k
22nF1
SHUTDOWN–R
SDNR
SHUTDOWN–L
SDNL
LEFT IN+
LEFT IN–
GAIN
RIGHT IN–
RIGHT IN+
SSM2356
EMISSION
CTRL
GAIN
CONTROL
GAIN
CONTROL
GAIN
GAIN = 6dB OR 18dB
08084-
001
Figure 1.
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