lm4820mm-6 National Semiconductor Corporation, lm4820mm-6 Datasheet - Page 4

• Manufacturer Part Number: lm4820mm-6
• Description: Fixed Gain 1 Watt Audio Power Amplifier
• Manufacturer: National Semiconductor Corporation

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P
THD+N
PSRR
A
Symbol
0
V
Electrical Characteristics V
The following specifications apply for V
25˚C. (Continued)
Note 1: All voltages are measured with respect to the ground 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 T
allowable power dissipation is P
derating curves for additional information.
Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5: Machine Model, 220 pF–240 pF discharged through all pins.
Note 6: Typicals are measured at 25˚C and represent the parametric norm.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I
External Components Description
Components
(Figure 1)
2.
4.
5.
Output Power ( 8Ω )
Output Power ( 4Ω )
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Fixed Voltage Gain
C
C
C
S
B
i
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a
highpass filter with R
for an explanation of how to determine the value of C
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.
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
Parameter
DMAX
= (T
JMAX
–T
DD
i
A
at f
)/θ
= 2.6V and 8Ω Load unless otherwise specified. Limits apply for T
JA
c
DD
= 1/(2π R
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4820-6, see power
THD = 1% (max); f = 1 kHz THD =
1% (max); f = 1 kHz
P
V
.5V
o
ripple
= 2.6V
= 0.1Wrms; f = 1kHz
in
rms, R
= 200mV sine p-p
i
C
i
). Refer to the section, Proper Selection of External Components,
Conditions
L
= 8Ω
Functional Description
(Notes 1, 2, 8)
4
i
.
JMAX
44 (f = 1kHz)
, θ
JA
(Note 6)
Typical
217Hz)
44 (f =
, and the ambient temperature T
0.08
0.2
0.4
6.0
LM4820-6
B
.
(Note 7)
Limit
SD
A
by a maximum of 2µA.
=
A
. The maximum
Units
dB
dB
W
W
%