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參數(shù)資料
| 型號： | LM4882 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 250mW Audio Power Amplifier with Shutdown Mode |
| 中文描述： | 25萬千瓦音頻功率放大器關(guān)斷模式 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 445K |
| 代理商： | LM4882 |
Electrical Characteristics
(Notes 1, 2) (Continued)
The following specifications apply for V
DD
= 3V unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4882
Units
(Limits)
Typical
(Note 5)
0.25
0.3
Limit
(Note 6)
THD + N
Total Harmonic Distortion + Noise
R
L
= 8
, P
O
= 70 mWrms;
R
L
= 32
, P
O
= 30 mWrms;
f = 1 kHz
V
pin3
= 2.5V, V
ripple
= 200 mVrms,
f = 120 Hz
%
%
PSRR
Power Supply Rejection Ratio
50
dB
Note 1:
All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2:
Absolute Maximum Ratingsindicate limits beyond which damage to the device may occur. Operating Ratingsindicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. Electrical Characteristicsstate DC andAC electrical specifications under particular test conditions which guar-
antee 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 performance.
Note 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
,
θ
, and the ambient temperature T
. The maximum
allowable power dissipation is P
= (T
T
)/
θ
. For the LM4882, T
= 150C, and the typical junction-to-ambient thermal resistance, when board
mounted, is 210C/W for the MUA08A Package and 170C/W for the M08A Package.
Note 4:
Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 5:
Typicals are measured at 25C and represent the parametric norm.
Note 6:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
External Components Description
(Refer to Figure 1)
Components
1. R
i
Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with R
f
. This resistor also forms a
high pass filter with C
i
at f
c
= 1 / (2
π
R
i
C
i
).
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with R
i
at f
c
= 1 / (2
π
R
i
C
i
). Refer to the section,
Proper Selection of External Components,
for an explanation of how to determine the values of C
i
.
Feedback resistance which sets closed-loop gain in conjunction with R
i
.
Supply bypass capacitor which provides power supply filtering. Refer to the
Application Information
section
for proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section,
Proper Selection of External
Components,
for information concerning proper placement and selection of C
B
.
Output coupling capacitor which blocks the DC voltage at the amplifier’s output. Forms a high pass filter wth
R
L
at f
O
= 1 / (2
π
R
L
C
O
).
2. C
i
3. R
f
4. C
S
5. C
B
6. C
O
Typical Performance Characteristics
THD+N vs Frequency
DS100030-26
THD+N vs Frequency
DS100030-9
THD+N vs Frequency
DS100030-10
3
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM48820 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ground-Referenced, Ultra Low Noise, Fixed Gain, 95mW Stereo Headphone Amplifier |
| LM48820TM | 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 |
| LM48820TM/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 |
| LM48820TMBD | 功能描述:BOARD EVAL GROUND REF AUDIO AMP RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:Boomer®, PowerWise® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| LM48820TMBD/NOPB | 功能描述:音頻 IC 開發(fā)工具 LM48820TMBD EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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