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LM4895 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4895
Description  1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain
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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 V
DD =3V (Notes 1, 2, 8)
The following specifications apply for V
DD = 3V and 8
Ω load unless otherwise specified. Limits apply for T
A =
25˚C. (Continued)
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 LM4895, see power derating
currents for additional information.
Note 4: Human body model, 100pF discharged through a 1.5k
Ω resistor.
Note 5: Machine Model, 220pF–240pF discharged through all pins.
Note 6: Typicals are measured at 25˚C and represent the parametric norm.
Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a maximum of 2µA.
Note 9: Unterminated input.
Note 10: 10
Ω terminated input.
Note 11: When driving 4
Ω loads from a 5V supply, the LM4895LD must be mounted to a circuit board.
External Components Description (Figure 1)
Components
Functional Description
1.
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.
2.
C
B
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External
Components, for information concerning proper placement and selection of C
B.
Typical Performance Characteristics
LD Specific Characteristics
LM4895LD
THD+N vs Output Power
V
DD = 5V, 4
Ω R
L
LM4895LD
THD+N vs Frequency
V
DD = 5V, 4
Ω R
L, and Power = 1W
20023202
20023210
www.national.com
4




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