lm4940tsx National Semiconductor Corporation, lm4940tsx Datasheet - Page 3

• Manufacturer Part Number: lm4940tsx
• Description: 6w Streo Audio Power Amplifier
• Manufacturer: National Semiconductor Corporation

I
I
V
V
P
THD+N
e
X
PSRR
DD
SD
OS
SDIH
SDIL
O
TALK
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics V
The following specifications apply for V
25˚C.
Note 1: All voltages are measured with respect to the GND 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
in Figure 1) with V
heatsink surface area.
Note 4: Human body model, 100pF discharged through a 1.5 kΩ 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: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9: Shutdown current is measured in a normal room environment. The Shutdown pin should be driven as close as possible to GND for minimum shutdown
current.
Supply Voltage (pin 6, referenced
to GND, pins 4 and 5)
Storage Temperature
Input Voltage
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
ESD Susceptibility (Note 5)
Symbol
pins 3 and 7
pins 1, 2, 8, and 9
DD
Quiescent Power Supply Current
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Power
Total Harmomic Distortion + Noise
Output Noise
Channel Separation
Power Supply Rejection Ratio
= 12V, R
L
DMAX
= 4Ω stereo operation the total power dissipation is 3.65W. θ
Parameter
= (T
JMAX
− T
−0.3V to V
DD
A
) / θ
−65˚C to +150˚C
Internally limited
= 12V, A
JA
−0.3V to 9.5V
DD
or the given in Absolute Maximum Ratings, whichever is lower. For the LM4940 typical application (shown
(Notes 1, 2)
DD
= 12V
V
+ 0.3V
2000V
18.0V
= 10, R
200V
V
V
Single Channel
THD+N = 1%
THD+N = 10%
V
P
A-Weighted Filter, V
Input Referred
P
V
1kHz
IN
SHUTDOWN
DD
O
O
RIPPLE
= 1Wrms, A
= 1W
= 0V, I
= 14.4V, THD+N = 10%
L
(Notes 1, 2)
= 4Ω, f = 1kHz unless otherwise specified. Limits apply for T
= 200mV
3
O
Conditions
= GND (Note 9)
Operating Ratings
= 0A, No Load
Junction Temperature
Thermal Resistance
Temperature Range
Supply Voltage
V
θ
θ
θ
θ
T
JC
JA
JC
JA
MIN
= 10, f = 1kHz
p-p
JA
(TS) (Note 3)
(TA) (Note 3)
(TS)
(TA)
, f
IN
= 20˚C/W for both TO263 and TO220 packages mounted to 16in
≤ T
RIPPLE
= 0V,
A
≤ T
JMAX
=
MAX
, θ
JA
, and the ambient temperature, T
(Note 6)
Typical
0.15
3.1
4.2
6.0
16
40
10
70
56
LM4940
(Notes 7, 8)
−40˚C ≤ T
V
Limit
100
10V ≤ V
2.0
0.4
2.8
DD
40
/2
A
. The maximum
www.national.com
DD
A
20˚C/W
20˚C/W
mA (max)
µA (max)
≤ 85˚C
(Limits)
V (max)
V (max)
W (min)
4˚C/W
4˚C/W
V (min)
150˚C
≤ 16V
Units
µV
dB
dB
%
A
=
2