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參數(shù)資料
| 型號： | LM4910MMX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.035 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 17/22頁 |
| 文件大?。?/td> | 828K |
| 代理商： | LM4910MMX/NOPB |
Electrical Characteristics V
The following specifications apply for V
DD = 2.6V, AV = 1, and 32
load unless otherwise specified. Limits apply to T
A = 25C.
Symbol
Parameter
Conditions
LM4910
Units
(Limits)
Typ
Limit
(Notes 7,
I
DD
Quiescent Power Supply Current
V
IN = 0V, 32
Load
3.0
mA (max)
I
SD
Standby Current
V
SHUTDOWN = GND
0.1
A (max)
V
OS
Output Offset Voltage
5
mV (max)
P
O
Output Power
THD = 1% (max); f = 1kHz
13
mW
THD+N
Total Harmonic Distortion + Noise P
O = 10mWrms; f = 1kHz
0.3
%
PSRR
Power Supply Rejection Ratio
V
RIPPLE = 200mVp-p sinewave
Input terminated with 10
to ground
55 (f =
217Hz)
55 (f =
1kHz)
dB
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, 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 LM4910, 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: If the product is in shutdown mode and VDD exceeds 6V (to a max of 8V VDD) then most of the excess current will flow through the ESD protection circuits.
If the source impedance limits the current to a max of 10ma then the part will be protected. If the part is enabled when VDD is above 6V circuit performance will be
curtailed or the part may be permanently damaged.
Note 10: Human body model, 100pF discharged through a 1.5k
resistor, Pin 6 to ground.
External Components Description (Figure 1)
Components
Functional Description
1.
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 fc = 1/(2
πR
iCi).
2.
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 fc = 1/(2
πR
iCi). Refer to the section Proper Selection of External Components, for
an explanation of how to determine the value of C
i.
3.
R
f
Feedback resistance which sets the closed-loop gain in conjunction with R
i.
4.
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.
LM4910
www.national.com
4
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