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參數(shù)資料
| 型號： | LM4911 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
| 中文描述： | 40mW的功率立體聲耳機放大器，低噪聲與耦合模式或無需輸出電容可選 |
| 文件頁數(shù)： | 5/18頁 |
| 文件大?。?/td> | 923K |
| 代理商： | LM4911 |
Electrical Characteristics V
DD
= 2.4V
(Notes 1, 2)
The following specifications apply for V
DD
= 2.4V, R
L
= 16
, and C
B
= 4.7μF unless otherwise specified. Limits apply to T
A
=
25C.
Symbol
Parameter
Conditions
LM4911
Units
(Limits)
Typ
(Note 6)
1.5
0.1
40
Limit
(Note 7)
3
2.0
80
I
DD
I
SD
I
M
Quiescent Power Supply Current
Shutdown Current
Mute Current
V
IN
= 0V, I
O
= 0A
V
SHUTDOWN
= GND
V
MUTE
= V
DD
, C-Coupled
THD = 1%; f = 1kHz
mA (max)
μA(max)
μA(max)
P
O
Output Power
mW
R = 16
R = 32
25
12
10
65
0.5
2
V
NO
PSRR
T
WU
Output Noise Voltage
Power Supply Rejection Ratio
Wake Up Time from Shutdown
BW = 20 Hz to 20kHz, A-weighted
V
RIPPLE
= 200mV sine p-p
OCL
C-Coupled, C
O
= 100μF
μV
dB
s
V
OSD
Output Voltage Change on
Release from Shutdown
Time to Un-Mute
C-Coupled, C
O
= 100μF
1
mV (max)
T
UM
C-Coupled, C
O
= 100μF
0.01
0.02
s (max)
Note 1:
All voltages are measured with respect to the GND pin unless otherwise specified.
Note 2:
: 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 performance.
Note 3:
: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX,
θ
, and the ambient temperature, T
. The
maximum allowable power dissipation is P
= (T
JMAX
- T
A
)/
θ
JA
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4911, see
power derating currents for more information.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Machine Model, 220pF-240pF discharged through all pins.
Note 6:
Typicals are measured at 25C and represent the parametric norm.
Note 7:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
10
Terminated input.
External Components Description
(
Figure 2
)
Components
1.
Functional Description
R
I
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
high-pass 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 value of C
i
.
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
Supply bypass capacitor which provides power supply filtering. Refer to the
Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section,
Proper Selection of Proper
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 with
R
L
at f
o
= 1/(2
π
R
L
C
o
)
2.
C
I
3.
4.
R
f
C
S
5.
C
B
6.
C
o
L
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LM4911LD | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
| LM4911LD/NOPB | 功能描述:IC AMP AUDIO PWR .145W AB 10LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負(fù)載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風(fēng)，靜音，短路保護，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) |
| LM4911LDX | 功能描述:IC AMP AUDIO PWR .145W AB 10LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負(fù)載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風(fēng)，靜音，短路保護，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) |
| LM4911MM | 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 |
| LM4911MM/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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