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LM4991LD Folha de dados(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM4991LD
Descrição Electrónicos  3W Audio Power Amplifier with Shutdown Mode
Download  15 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4991LD Folha de dados(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics V
DD =3V (Notes 2, 3)
The following specifications apply for V
DD = 3V and RL =8
Ω unless otherwise specified. Limits apply for T
A =
25˚C. (Continued)
Symbol
Parameter
Conditions
LM4991
Typical
(Note 7)
Limit
(Note 8)
Units
(Limits)
PSRR
Power Supply Rejection
Ratio
V
RIPPLE = 200mV sine p-p,
Input terminated with 10
Ω,
f = 1kHz
68
dB
Electrical Characteristics V
DD = 2.6V (Notes 2, 3)
The following specifications apply for V
DD = 2.6V and RL =8
Ω unless otherwise specified. Limits apply for T
A = 25˚C.
Symbol
Parameter
Conditions
LM4991
Typical
(Note 7)
Limit
(Note 8)
Units
(Limits)
I
DD
Quiescent Power Supply
Current
V
IN = 0V, no Load
2
mA (max)
V
IN = 0V, RL =8
3
I
SD
Shutdown Current
V
SHUTDOWN =VDD
0.1
µA(max)
V
SDIH
Shutdown Voltage Input High
1
V
V
SDIL
Shutdown Voltage Input Low
0.9
V
V
OS
Output Offset Voltage
5
35
mV (max)
P
o
Output Power
THD = 1% (max), f = 1kHz
R
L =4
R
L =8
400
300
mW
THD+N
Total Harmonic
Distortion+Noise
P
O = 0.15W, f = 1kHz
0.1
%
PSRR
Power Supply Rejection
Ratio
V
RIPPLE = 200mV sine p-p,
Input terminated with 10
Ω,
f = 1kHz
51
dB
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: All voltages are measured with respect to the ground pin, unless otherwise specified.
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 LM4991, TJMAX = 150˚C.
For the
θJA’s for different packages, please see the Application Information section or the Absolute Maximum Ratings section.
Note 5: Human body model, 100pF discharged through a 1.5k
Ω resistor.
Note 6: Machine Model, 220pF–240pF discharged through all pins.
Note 7: Typicals are specified at 25˚C and represent the parametric norm.
Note 8: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 9: The given
θJA is for an LM4991 packaged in an LDC08A with the Exposed–DAP soldered to an exposed 1in2 area of 1oz printed circuit board copper.
Note 10: When driving 3
Ω or 4Ω loads from a 5V supply, the LM4991LD must be mounted to a circuit board.
www.national.com
4


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