If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (pin 6, referenced
to GND, pins 4 and 5)
Storage Temperature
Input Voltage
pins 3 and 7
pins 1, 2, 8, and 9
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
−0.3V to V
DD
+ 0.3V
−0.3V to 9.5V
Internally limited
2000V
18.0V
−65˚C to +150˚C
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
−40˚C
≤
T
A
≤
85˚C
9.6V
≤
V
DD
≤
16V
Electrical Characteristics V
DD
= 12V
(Notes 1, 2)
The following specifications apply for V
DD
= 12V, A
V
= 0dB (SE) or 6dB (BTL) unless otherwise specified. Limits apply for T
A
=
25˚C.
Symbol
Parameter
Conditions
LM4950
Typical
(Note 6)
I
DD
I
SD
V
OS
V
SDIH
V
SDIL
T
WU
TSD
P
O
Quiescent Power Supply Current
Shutdown Current
Offset Voltage
Shutdown Voltage Input High
Shutdown Voltage Input Low
Wake-up Time
Thermal Shutdown Temperature
Output Power
f = 1kHz
R
L
= 4Ω SE, Single Channel,
THD+N = 1%
R
L
= 8Ω BTL, THD+N = 10%
P
O
= 2.5Wrms; f = 1kHz;
R
L
= 4Ω SE
P
O
= 2.5Wrms; A
V
= 10; f = 1kHz;
R
L
= 4Ω, SE
A-Weighted Filter, V
IN
= 0V,
Input Referred
f
IN
= 1kHz, P
O
= 1W, SE Mode
R
L
= 8Ω
R
L
= 4Ω
V
RIPPLE
= 200mV
p-p
, f = 1kHz,
R
L
= 8Ω, BTL
V
IN
= 0V, R
L
= 500mΩ
C
B
= 10µF
440
170
150
190
V
IN
= 0V, I
O
= 0A, No Load
V
SHUTDOWN
= GND (Note 9)
V
IN
= 0V, RL = 8Ω
16
40
5
Limit
(Notes 7, 8)
30
80
30
2.0
V
DD
/2
0.4
Units
(Limits)
mA (max)
µA (max)
mV (max)
V (min)
V (max)
V (max)
ms
˚C (min)
˚C (max)
3.1
7.5
0.05
3.0
W (min)
THD+N
Total Harmomic Distortion + Noise
%
0.14
10
µV
e
OS
X
TALK
Output Noise
Channel Separation
76
70
70
5
56
dB
PSRR
I
OL
Power Supply Rejection Ratio
Output Current Limit
dB (min)
A
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
JMAX
,
θ
JA
, and the ambient temperature, T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
− T
A
) /
θ
JA
or the given in Absolute Maximum Ratings, whichever is lower. For the LM4950 typical application (shown
in
Figure 1)
with V
DD
= 12V, R
L
= 4Ω stereo operation the total power dissipation is 3.65W.
θ
JA
= 20˚C/W for both TO263 and TO220 packages mounted to 16in
2
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.
3
www.national.com
LM4950
Electrical Characteristics V
DD
= 12V
(Notes 1, 2)
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).
(Continued)
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
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