lm4835lq National Semiconductor Corporation, lm4835lq Datasheet - Page 4

• Manufacturer Part Number: lm4835lq
• Description: Stereo 2w Audio Power Amplifiers With Dc Volume Control And Selectable Gain
• Manufacturer: National Semiconductor Corporation

www.national.com
SNR
X
V
P
THD+N
PSRR
SNR
X
talk
OS
O
talk
Electrical Characteristics for Single-Ended Mode Operation
(Notes 8, 12) The following specifications apply for V
Symbol
Electrical Characteristics for Bridged Mode Operation
(Notes 8, 12) The following specifications apply for V
Symbol
Note 3: The θ
Note 4: The θ
through 21 8mil vias.
Note 5: The θ
Note 6: The θ
Note 7: The given θ
Note 8: 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 1.
Note 9: When driving 3Ω loads and operating on a 5V supply, the LM4835MTE must be mounted to the circuit board and forced-air cooled.
Note 10: When driving 4Ω loads and operating on a 5V supply, the LM4835MTE must be mounted to the circuit board.
Note 11: When driving a 3Ω or 4Ω loads and operating on a 5V supply, the LM4835LQ must be mounted to the circuit board that has a minimum of 2.5in
exposed, uninterrupted copper area connected to the LLP package’s exposed DAP.
Note 12: 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 13: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
resistance, when board mounted, is 80˚C/W for the MTC28 package and 42˚C/W for the LM4835LQ package.
Note 14: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 15: Machine Model, 220pF–240pF discharged through all pins.
Note 16: Typicals are measured at 25˚C and represent the parametric norm.
Note 17: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Signal to Noise Ratio
Channel Separation
Output Offset Voltage
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
Channel Separation
JA
JA
JA
JA
given is for an MXA28A package whose exposed-DAP is soldered to an exposed 2in
given is for an MXA28A package whose exposed-DAP is soldered to a 2in
given is for an MXA28A package whose exposed-DAP is soldered to an exposed 1in
given is for an MXA28A package whose exposed-DAP is not soldered to any copper.
JA
is for an LM4835 packaged in an LQA24A with the exposed-DAP soldered to an exposed 2in
Parameter
Parameter
DMAX
= (T
JMAX
− T
A
)/θ
JA
. For the LM4835LQ and LM4835MT, T
P
Filter
f=1kHz, C
V
THD + N = 1.0%; f=1kHz; R
(Notes 9, 11)
THD + N = 1.0%; f=1kHz; R
(Notes 10, 11)
THD = 0.5% (max);f = 1 kHz;
R
THD+N = 10%;f = 1 kHz; R
P
R
P
C
V
V
A-Wtd Filter
f=1kHz, C
OUT
IN
O
O
RIPPLE
DD
L
L
B
DD
DD
= 8Ω
= 8Ω, A
= 1.0 µF, f = 120 Hz,
= 1W, 20 Hz
= 340 mW, R
= 0V
= 5V, P
=75 mW, R
= 5V. Limits apply for T
= 5V, unless otherwise noted. Limits apply for T
= 200 mVrms; R
B
B
VD
= 1.0 µF
= 1.0 µF
OUT
Conditions
Conditions
4
= 2
<
= 1.1W, R
L
L
f
= 32Ω
= 32Ω, A-Wtd
<
2
20 kHz,
piece of 1 ounce printed circuit board copper on a bottom side layer
L
= 8Ω
L
L
L
L
= 8Ω,
= 8Ω
JMAX
A
= 3Ω
= 4Ω
2
2
JMAX
= 25˚C.
piece of 1 ounce printed circuit board copper.
piece of 1 ounce printed circuit board copper.
= 150˚C, and the typical junction-to-ambient thermal
, θ
JA
, and the ambient temperature T
(Note 16)
(Note 16)
Typical
Typical
2
102
2.2
1.1
1.5
0.3
1.0
65
74
93
70
area of 1oz printed circuit board copper.
5
2
LM4835
LM4835
(Continued)
(Note 17)
(Note 17)
A
Limit
= 25˚C.
Limit
1.0
30
A
. The maximum
mV (max)
(Limits)
(Limits)
W (min)
Units
Units
dB
dB
dB
dB
dB
W
W
W
%
%
2
of