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參數(shù)資料
| 型號： | SSM2302CPZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 1.4W STER D 16LFCSP |
| 標準包裝： | 5,000 |
| 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： | 1.4W x 2 @ 8 歐姆 |
| 電源電壓： | 2.5 V ~ 5 V |
| 特點： | 消除爆音，差分輸入，短路和熱保護，關(guān)閉 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 16-LFCSP-VQ |
| 封裝/外殼： | 16-VFQFN 裸露焊盤，CSP |
| 包裝： | 帶卷 (TR) |
| 配用： | SSM2302Z-EVAL-ND - BOARD EVAL FOR SSM2302 |
SSM2302
Rev. 0 | Page 13 of 20
LAYOUT
As output power continues to increase, care needs to be taken to
lay out PCB traces and wires properly between the amplifier,
load, and power supply. A good practice is to use short, wide
PCB tracks to decrease voltage drops and minimize inductance.
Make track widths at least 200 mil for every inch of track length
for lowest DCR, and use 1 oz or 2 oz of copper PCB traces to
further reduce IR drops and inductance. A poor layout
increases voltage drops, consequently affecting efficiency. Use
large traces for the power supply inputs and amplifier outputs to
minimize losses due to parasitic trace resistance. Proper
grounding guidelines helps to improve audio performance,
minimize crosstalk between channels, and prevent switching
noise from coupling into the audio signal. To maintain high
output swing and high peak output power, the PCB traces that
connect the output pins to the load and supply pins should be as
wide as possible to maintain the minimum trace resistances. It
is also recommended to use a large-area ground plane for
minimum impedances. Good PCB layouts also isolate critical
analog paths from sources of high interference. High frequency
circuits (analog and digital) should be separated from low
frequency ones. Properly designed multilayer printed circuit
boards can reduce EMI emission and increase immunity to RF
field by a factor of 10 or more compared with double-sided
boards. A multilayer board allows a complete layer to be used
for ground plane, whereas the ground plane side of a double-
side board is often disrupted with signal crossover. If the system
has separate analog and digital ground and power planes, the
analog ground plane should be underneath the analog power
plane, and, similarly, the digital ground plane should be
underneath the digital power plane. There should be no overlap
between analog and digital ground planes nor analog and
digital power planes.
INPUT CAPACITOR SELECTION
The SSM2302 will not require input coupling capacitors if the
input signal is biased from 1.0 V to VDD 1.0 V. Input
capacitors are required if the input signal is not biased within
this recommended input dc common-mode voltage range, if
high-pass filtering is needed (Figure 20), or if using a single-
ended source (Figure 21). If high-pass filtering is needed at the
input, the input capacitor along with the input resistor of the
SSM2302 will form a high-pass filter whose corner frequency is
determined by the following equation:
fC = 1/(2π × RIN × CIN)
Input capacitor can have very important effects on the circuit
performance. Not using input capacitors degrades the output
offset of the amplifier as well as the PSRR performance.
PROPER POWER SUPPLY DECOUPLING
To ensure high efficiency, low total harmonic distortion (THD),
and high PSRR, proper power supply decoupling is necessary.
Noise transients on the power supply lines are short-duration
voltage spikes. Although the actual switching frequency can
range from 10 kHz to 100 kHz, these spikes can contain
frequency components that extend into the hundreds of
megahertz. The power supply input needs to be decoupled with
a good quality low ESL and low ESR capacitor—usually around
4.7 μF. This capacitor bypasses low frequency noises to the
ground plane. For high frequency transients noises, use a 0.1 μF
capacitor as close as possible to the VDD pin of the device.
Placing the decoupling capacitor as close as possible to the
SSM2302 helps maintain efficiency performance.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SSM2302CPZ-REEL7 | 功能描述:IC AMP AUDIO 1.4W STER D 16LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)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(shù)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(guān)閉，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)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 |
| SSM2302N | 制造商:SSC 制造商全稱:Silicon Standard Corp. 功能描述:N-CHANNEL ENHANCEMENT-MODE POWER MOSFET |
| SSM2302Z-EVAL | 功能描述:BOARD EVAL FOR SSM2302 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| SSM2303N | 制造商:SSC 制造商全稱:Silicon Standard Corp. 功能描述:P-CHANNEL ENHANCEMENT-MODE POWER MOSFET |
| SSM2304 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2 W Filterless Class-D Stereo Audio Amplifier |
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