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| 型号： | CS35L00-CNZ |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 音频／视频放大 |
| 中文描述： | 2.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封装： | 3 X 3 MM, LEAD FREE, MO-220, DFN-10 |
| 文件页数： | 9/34页 |
| 文件大小： | 730K |
| 代理商： | CS35L00-CNZ |
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CS35L00
DS906PP1
17
ZIN = Input impedance of the device being used (See “Electrical Characteristics - SD Mode” on page 10,
“Electrical Characteristics - FSD Mode” on page 11, “Electrical Characteristics - HD Mode” on page 12, or
“Electrical Characteristics - FHD Mode” on page 13 for this value.)
ZEXT = Value of the resistor added in series with the inputs
AV = Original gain of the device being used (See “Electrical Characteristics - All Operational Modes” on
page 9 for this value.)
5.3
Output Filtering with the CS35L00
The CS35L00 is specifically designed to minimize radiated electromagnetic interference (EMI) signals. All
of the devices are capable of meeting all stated data sheet performance numbers with no special filtering
required. Additionally, the device has shown to be below the compliance limits of both FCC and CISPR test-
ing with no external filtering required.
Ultimately, compliance with any radiated emissions requirements depends significantly on the entire system
under test. In applications where system-level trade-offs, such as compromised component layout or
lengthy speaker wires, have increased emissions levels, a passive output filter can be added to the outputs
of the device in order to decrease EMI levels.
5.3.1
Reduced Filter Order with the CS35L00
In applications which require an output filter, the unique design of the CS35L00 allows a much smaller,
less expensive output filter to be used than what is normally found in Class D amplifiers. In contrast to a
second order filter implemented with a series inductive element (traditional inductor or ferrite beads) and
a shunt capacitive element, basic filtering for the CS35L00 is accomplished by a single-order capacitive
element attached to the OUTx terminals. This is highlighted in Figure 5 below. Of course, if the system
requires more aggressive filtering, a ferrite bead can be added in series with the outputs to further atten-
uate system level noise.
5.3.2
Filter Component Selection
Usually, the need for output filtering is determined after the system under test has failed EMI testing. Dur-
ing this testing, problem frequencies are easily identified by the peaks which appear in the spectral plots
gathered in the EMI testing.
Selection of the filter components should ensure that shunt elements (i.e. CFILT in Figure 5 on page 17)
present a very low impedance at the frequency corresponding to the tallest peak in the spectral plot. If
needed, series components such as ferrite beads (i.e. LFILT in Figure 5 on page 17) should be chosen to
present a very high impedance at the frequency corresponding to the tallest peak in the spectral plot.
Careful attention should be paid to the current carrying capabilities of any included ferrite beads and the
impedance of the ferrite beads in the audio band. A proper trade-off in ferrite bead selection is one that
CFILT
Traditional 2nd Order Optional Filtering
CS35L00’s Minimized Optional Filtering
OUT+
OUT-
CFILT
x
LFILT
OUT+
OUT- x
x
Figure 5. Optional Output Filter Components
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS35L00-CNZR | 功能描述:音频放大器 Low Power Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| CS35L01 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:2.9 W Mono Class-D Audio Amplifier with Low Idle Current |
| CS35L01-CWZ | 功能描述:音频放大器 Mono Low Power Amp w/ +6dB Gain RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| CS35L01-CWZR | 功能描述:IC AMP AUD LP 3W MONO D 9WLCSP 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 |
| CS35L03 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:2.9 W Mono Class-D Audio Amplifier with Low Idle Current |
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