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参数资料
| 型号： | LM4914MH/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.085 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封装： | TSSOP-10 |
| 文件页数： | 12/16页 |
| 文件大小： | 767K |
| 代理商： | LM4914MH/NOPB |
Electrical Characteristics: Bridged-Mode Operation (V
DD = 3V)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A = 25C.
Symbol
Parameter
Conditions
LM4914
Units
(Limits)
Typical
Limit
(Notes 9, 10)
P
O
Output Power (Note 11)
THD = 0.1%, f = 1kHz
A
V = 14dB, RL =8
330
mW
THD+N
Total Harmonic Distortion + Noise
f = 1kHz
P
O = 250mW
0.2
%
V
ON
Output Voltage Noise
C
B = 0.47F, 20Hz < f < 20kHz
29
V
RMS
Electrical Characteristics: SE Operation (V
DD = 3V)
The following specifications apply for the circuit shown in Figure 1 and a measurement bandwidth of 20Hz to 80kHz, unless
otherwise specified. Limits apply for T
A = 25C.
Symbol
Parameter
Conditions
LM4914
Units
(Limits)
Typical
Limit
(Notes 9, 10)
P
O
Output Power (Note 11)
THD+N = 0.1%, f = 1kHz,
R
L =32
,A
V = 1.9dB (Note 12)
30
mW
V
ON
Output Voltage Noise
C
B = 0.47F, 20Hz < f < 20kHz
13
V
RMS
Note 1: When operating on a 5VDC, an LM4914MH that has been properly mounted to a circuit board will deliver 1W into 8. See the Application Information
sections for further information concerning PCB layout suggestions to maximize the LM4914MH’s output power into an 8
load.
Note 2: All voltages are measured with respect to the GND 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 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 or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4914, see power derating
curves for additional information.
Note 5: Human body model, 100pF discharged through a 1.5k
resistor.
Note 6: Machine Model, 220pF–240pF discharged through all pins.
Note 7: The given
θJA is for an LM4914 packaged in an MH with the Exposed-DAP soldered to an exposed 2in2 area of 1oz printed circuit board copper.
Note 8: Typicals are measured at 25C and represent the parametric norm.
Note 9: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 10: Datasheet minimum and maximum specification limits are guaranteed by design, test, or statistical analysis.
Note 11: Output power is measured at the amplifier’s package pins.
Note 12: See Application Information section "Single-Ended Output Power Performance and Measurement Considerations" for more information.
LM4914
www.national.com
5
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