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參數(shù)資料
| 型號： | LM4899ITL/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封裝： | MICRO SMD-9 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 593K |
| 代理商： | LM4899ITL/NOPB |
Electrical Characteristics V
The following specifications apply for V
DD = 3V and 8
load unless otherwise specified. Limits apply for T
A =
25C. (Continued)
Symbol
Parameter
Conditions
LM4899
Units
(Limits)
Typical
Limit
PSRR
Power Supply Rejection Ratio
V
ripple = 200mV sine p-p
f = 217Hz (Note 9)
83
dB
f = 1kHz (Note 9)
84
f = 217Hz (Note 10)
83
f = 1kHz (Note 10)
83
CMRR
Common-Mode Rejection Ratio
f = 217Hz, V
CM = 200mVpp
50
dB
V
OS
Offset Voltage
V
IN =0V
2
mV
V
SDIH
Shutdown Voltage Input High
SD Mode = GND
0.8
V
SDIL
Shutdown Voltage Input Low
SD Mode = GND
0.6
V
SDIH
Shutdown Voltage Input High
SD Mode = V
DD
0.8
V
SDIL
Shutdown Voltage Input Low
SD Mode = V
DD
0.6
V
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 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, θJA, and the ambient temperature TA. The maximum
allowable power dissipation is PDMAX =(TJMAX–TA)/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4899, see power derating
currents for additional 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: 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 ISD by a maximum of 2A.
Note 9: Unterminated input.
Note 10: 10
terminated input.
Note 11: : When driving 4
loads from a 5V power supply, the LM4899LD 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
Functional Description
1.
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.
2.
C
B
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.
LM4899
www.national.com
5
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