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參數(shù)資料
| 型號： | LM4818M/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 483K |
| 代理商： | LM4818M/NOPB |
Electrical Characteristics V
The following specifications apply for V
DD = 3V and RL =16
load unless otherwise stated. Limits apply to T
A =
25C. (Continued)
Note 1: See AN-450 "Surface Mounting and their Effects on Product Reliability" for other methods of soldering surface mount devices.
Note 2: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given. However, the typical value is a good indication of device’s performance.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum
allowable power dissipation is PDMAX =(TJMAX–TA)/θJA. For the LM4818, TJMAX = 150C and the typical junction-to-ambient thermal resistance (θJA) when board
mounted is 170C/W for the SOP package.
Note 5: Human body model, 100pF discharged through a 1.5 k
resistor.
Note 6: Machine Model, 220pF–240pF capacitor is discharged through all pins.
Note 7: Typical specifications are specified at 25C and represent the parametric norm.
Note 8: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 9: Datasheet min/max specification limits are guaranteed by designs, test, or statistical analysis.
Note 10: The Shutdown pin (pin 1) should be driven as close as possible to VDD for minimum current in Shutdown Mode.
External Components Description (Figure 1)
Components
Functional Description
1.
R
i
Combined with R
f, this inverting input resistor sets the closed-loop gain. Ri also forms a high pass filter with
C
i at fc = 1/(2
πR
iCi).
2.
C
i
This input coupling capacitor blocks DC voltage at the amplifier’s terminals. Combined with R
i, it creates a
high pass filter with R
i at fc = 1/(2
πR
iCi). Refer to the section, Proper Selection of External Components for
an explanation of how to determine the value of C
i.
3.
R
f
Combined with R
i, this is the feedback resistor that sets the closed-loop gain: Av = 2(RF/Ri).
4.
C
S
This is the power supply bypass capacitor that filters the voltage applied to the power supply pin. Refer to the
Application Information section for proper placement and selection of C
s.
5.
C
B
This is the bypass pin capacitor that filters the voltage at the BYPASS pin. Refer to the section, Proper
Selection of External Components for information concerning proper placement and selection of C
B.
6.
C
B2
This is an optional capacitor that is not needed in the majority of applications. If the capacitor is not used, pin
3 should be connected directly to pin2. Refer to the section Proper Selection of External Components for
more information concerning C
B2.
Typical Performance Characteristics
20038937
20038938
LM4818
www.national.com
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|---|---|
| LM4818MX | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4818MX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4819 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:350mW Audio Power Amplifier with Shutdown Mode |
| LM4819LD | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4819LD/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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