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LM4766 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM4766
Description  Audio Power Amplifier Series Dual 40W Audio Power Amplifier with Mute
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM4766 Datasheet(HTML) 3 Page - National Semiconductor (TI)

 
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Electrical Characteristics (Notes 4, 5) (Continued)
The following specifications apply for V
CC = +30V, VEE = −30V, IMUTE = −0.5 mA with RL = 8Ω unless otherwise specified.
Limits apply for T
A = 25˚C.
Symbol
Parameter
Conditions
LM4766
Units
(Limits)
Typical
Limit
(Note 9)
(Note 10)
SNR
Signal-to-Noise Ratio
P
O = 1W, A — Weighted,
98
dB
Measured at 1 kHz, R
S = 25Ω
P
O = 25W, A — Weighted
112
dB
Measured at 1 kHz, R
S = 25Ω
A
M
Mute Attenuation
Pin 6,11 at 2.5V
115
80
dB (min)
Note 1: Operation is guaranteed up to 60V, however, distortion may be introduced from SPiKe Protection Circuitry if proper thermal considerations are not taken into
account. Refer to the Application Information section for a complete explanation.
Note 2: DC Electrical Test; Refer to Test Circuit #1.
Note 3: AC Electrical Test; Refer to Test Circuit #2.
Note 4: All voltages are measured with respect to the GND pins (5, 10), unless otherwise specified.
Note 5: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-
antee 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 6: 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˚C/W (junction to case) for the T package. Refer to the section Determining the Correct Heat Sink in the Application Information section.
Note 7: Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
Note 8: The operating junction temperature maximum is 150˚C, however, the instantaneous Safe Operating Area temperature is 250˚C.
Note 9: Typicals are measured at 25˚C and represent the parametric norm.
Note 10: Limits are guarantees that all parts are tested in production to meet the stated values.
Note 11: VEE must have at least −9V at its pin with reference to ground in order for the under-voltage protection circuitry to be disabled. In addition, the voltage dif-
ferential between VCC and VEE must be greater than 14V.
Note 12: The output dropout voltage, VOD, is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in the Typical Per-
formance Characteristics section.
Test Circuit #1 (Note 2) (DC Electrical Test Circuit)
DS100928-3
www.national.com
3


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