lm4839mtx

Manufacturer Part Numberlm4839mtx
DescriptionStereo 2w Audio Power Amplifiers With Dc Volume Control, Bass Boost, And Input Mux
ManufacturerNational Semiconductor Corporation
lm4839mtx datasheet
 


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Electrical Characteristics for Single-Ended Mode Operation
(Notes 7, 10)
The following specifications apply for V
Symbol
Parameter
P
Output Power
O
THD+N
Total Harmonic Distortion+Noise
PSRR
Power Supply Rejection Ratio
SNR
Signal to Noise Ratio
X
Channel Separation
talk
Electrical Characteristics for Bridged Mode Operation
(Notes 7, 10)
The following specifications apply for V
Symbol
Parameter
V
Output Offset Voltage
OS
P
Output Power
O
THD+N
Total Harmonic Distortion+Noise
PSRR
Power Supply Rejection Ratio
SNR
Signal to Noise Ratio
X
Channel Separation
talk
Note 3: The
given is for an MXA28A package whose exposed-DAP is soldered to an exposed 2in
JA
Note 4: The
given is for an MXA28A package whose exposed-DAP is soldered to a 2in
JA
through 21 8mil vias.
Note 5: The
given is for an MXA28A package whose exposed-DAP is soldered to an exposed 1in
JA
Note 6: The
given is for an MXA28A package whose exposed-DAP is not soldered to any copper.
JA
Note 7: All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical application as shown
in Figure 2.
Note 8: When driving 3
loads from a 5V supply the LM4839MTE exposed DAP must be soldered to the circuit board and forced-air cooled.
Note 9: When driving 4
loads from a 5V supply the LM4839MTE exposed DAP must be soldered to the circuit board.
Note 10: 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 11: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
= (T
DMAX
JMAX
mounted, is 80˚C/W assuming the MTC28 package.
Note 12: Human body model, 100 pF discharged through a 1.5 k
Note 13: Machine Model, 220 pF–240 pF discharged through all pins.
Note 14: Typicals are measured at 25˚C and represent the parametric norm.
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= 5V and T
= 25˚C unless otherwise noted.
DD
A
Conditions
THD+N = 1.0%; f = 1kHz;
R
= 32
L
THD+N = 10%; f = 1 kHz; R
32
V
= 1V
, f=1kHz, R
OUT
RMS
L
A
= 1
VD
C
= 1.0 µF, f =120 Hz,
B
V
= 200 mVrms
RIPPLE
P
=75 mW, R
= 32 , A-Wtd
OUT
L
Filter
f=1kHz, C
= 1.0 µF
B
= 5V and T
= 25˚C unless otherwise noted.
DD
A
Conditions
V
= 0V, No Load
IN
THD + N = 1.0%; f=1kHz; R
(Note 8)
THD + N = 1.0%; f=1kHz; R
(Note 9)(Note 15)
THD = 1.5% (max);f = 1 kHz;
R
= 8
L
THD+N = 10%;f = 1 kHz; R
<
<
P
= 1W, 20 Hz
f
20 kHz,
O
R
= 8 , A
= 2
L
VD
P
= 340 mW, R
= 32
O
L
C
= 1.0 µF, f = 120 Hz,
B
V
= 200 mVrms; R
RIPPLE
L
V
= 5V, P
= 1.1W, R
DD
OUT
A-Wtd Filter
f=1kHz, C
= 1.0 µF
B
2
piece of 1 ounce printed circuit board copper on a bottom side layer
− T
)/
. For the LM4839MT, T
= 150˚C, and the typical junction-to-ambient thermal resistance, when board
A
JA
JMAX
resistor.
4
LM4839
Typical
Limit
(Note 14)
(Note 15)
85
=
95
L
= 10k ,
0.065
58
102
65
LM4839
Typical
Limit
(Note 14)
(Note 15)
±
50
= 3
2.2
L
= 4
2
L
1.1
1.0
= 8
1.5
L
0.3
1.0
74
= 8
= 8 ,
93
L
70
2
piece of 1 ounce printed circuit board copper.
2
piece of 1 ounce printed circuit board copper.
,
, and the ambient temperature T
. The maximum
JMAX
JA
A
Units
(Limits)
mW
mW
%
dB
dB
dB
Units
(Limits)
mV (max)
W
W
W (min)
W
%
%
dB
dB
dB