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參數(shù)資料
| 型號(hào)： | MXF10A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1W Monaural, 85mW Stereo Headphone Audio Amplifier |
| 中文描述： | 1W的單聲道，85mW立體聲耳機(jī)音頻放大器 |
| 文件頁(yè)數(shù)： | 5/15頁(yè) |
| 文件大?。?/td> | 384K |
| 代理商： | MXF10A |
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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.
(Note 3)
Symbol
Parameter
Conditions
LM4914
Units
(Limits)
Typical
(Note 8)
Limit
(Notes 9, 10)
P
O
Output Power (Note 11)
THD = 0.1%, f = 1kHz
A
V
= 14dB, R
L
= 8
f = 1kHz
P
O
= 250mW
C
B
= 0.47μF, 20Hz
<
f
<
20kHz
330
mW
THD+N
Total Harmonic Distortion + Noise
0.2
%
V
ON
Output Voltage Noise
29
μV
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.
(Note 3)
Symbol
Parameter
Conditions
LM4914
Units
(Limits)
Typical
(Note 8)
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)
C
B
= 0.47μF, 20Hz
<
f
<
20kHz
30
mW
V
ON
Output Voltage Noise
13
μV
RMS
Note 1:
When operating on a 5V
, 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 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 4:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
,
θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/
θ
JA
or the number given inAbsolute 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
θ
JA
is for an LM4914 packaged in an MH with the Exposed-DAP soldered to an exposed 2in
2
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.
L
www.national.com
5
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