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參數(shù)資料
| 型號： | LM4898 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
| 中文描述： | 1瓦特全差分音頻功率放大器，具有關(guān)斷選擇 |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 596K |
| 代理商： | LM4898 |
Electrical Characteristics V
DD
= 3V
The following specifications apply for V
DD
= 3V, 8
load and A
V
= 1V/V, unless otherwise specified. Limits apply for T
A
=
25C.
(Notes 1, 2, 8)
Symbol
Parameter
Conditions
LM4898
Units
(Limits)
Typical
(Note 6)
2.5
4
0.1
0.35
Limit
(Note 7)
5 .5
9
1
I
DD
Quiescent Power Supply Current
V
IN
= 0V, no load
V
IN
= 0V, R
L
= 8
V
SDMODE
= V
SHUTDOWN
= GND
THD = 1% (max); f = 1kHz
LM4898, RL = 8
P
o
= 0.25Wrms; f = 1kHz
V
ripple
= 200mV sine p-p
f = 217Hz (Note 9)
f = 1kHz (Note 9)
f = 217Hz (Note 10)
f = 1kHz (Note 10)
f = 217Hz
V
CM
= 200mV
PP
V
IN
= 0V
SD Mode = GND
SD Mode = GND
SD Mode = V
DD
SD Mode = V
DD
mA (max)
I
SD
P
o
Shutdown Current
Output Power
μA (max)
W
THD+N
PSRR
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
0.03
%
83
84
83
83
50
dB
CMRR
Common-Mode Rejection Ratio
dB
V
OS
V
SDIH
V
SDIL
V
SDIH
V
SDIL
Output Offset
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
2
mV
V
V
V
V
0.8
0.6
0.8
0.6
Note 1:
All voltages are measured with respect to the ground 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 andAC 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 T
,
θ
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/
θ
JA
or the number given in Absolute Maximum Ratings, whichever is lower.
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:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8:
For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I
SD
by a maximum of 2μA.
Note 9:
Unterminated input.
Note 10:
10
terminated input.
Note 11:
When driving 4
loads from a 5V supply, the LM4898LD must be mounted to a circuit board with the exposed-DAP area soldered down to a 1sq. in plane
of 1oz. copper..
External Components Description
(
Figure 1
)
Components
1.
Functional Description
C
S
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 External
Components
, for information concerning proper placement and selection of C
B
.
Inverting input resistance which sets the closed-loop gain in conjunction with R
f
.
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
2.
C
B
3.
4.
R
i
R
f
L
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| LM4898ITLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
| LM4898ITLX/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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