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LM4756 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4756
Description  Dual 7W Audio Power Amplifier w/Mute, Standby and Volume Control
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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 4 page
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Electrical Characteristics (Notes 3, 4) (Continued)
The following specifications apply for V
CC = +22V, and Volume at 0dB unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
LM4756
Units
(Limits)
Typical
(Note 8)
Limit
(Note 9)
SNR
Signal-to-Noise Ratio
Measured at 1 kHz, R
s =25
P
o = 4.8W, A - Weighted,
70
dB
Standby
V
IL
Standby Low Input Voltage
0.8
V (max)
V
IH
Standby High Input Voltage
2.0
V (min)
Mute
V
IL
Mute Low Input Voltage
0.8
V (max)
V
IH
Mute High Input Voltage
2.0
V (min)
Note 1: DC Electrical Test.
Note 2: AC Electrical Test.
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: All voltages are measured with respect to the ground (pin 8), unless otherwise specified.
Note 5: 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 the Absolute Maximum Ratings, whichever is lower. For operating at case
temperatures above 25˚C, the device must be derated based on a 150˚C maximum junction temperature and a thermal resistance of
θJC = 1.5˚C/W (junction to
case).
Note 6: Human body model, 100pF discharged through a 1.5k
Ω resistor.
Note 7: Machine model, 200pF–240pF discharge through all pins.
Note 8: Typicals are measured at 25˚C and represent the parametric norm.
Note 9: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 10: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Standby Mute Pin Function Table
Standby (Pin 9)
Mute (Pin 10)
Operating Condition
“L” or Open
“L”
Play
“L” or Open
“H” or Open
Mute
“H”
“L”
Standby
“H”
“H” or Open
Standby
www.national.com
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