Datasheet

LM4950
SNAS174E –JULY 2003–REVISED MAY 2013 www.ti.com
Electrical Characteristics V
DD
= 12V
(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 Units
(Limits)
Typical
(3)
Limit
(4)(5)
I
DD
Quiescent Power Supply Current V
IN
= 0V, I
O
= 0A, No Load 16 30 mA (max)
I
SD
Shutdown Current V
SHUTDOWN
= GND
(6)
40 80 µA (max)
V
OS
Offset Voltage V
IN
= 0V, RL = 8Ω 5 30 mV (max)
V
SDIH
Shutdown Voltage Input High 2.0 V (min)
V
DD
/2 V (max)
V
SDIL
Shutdown Voltage Input Low 0.4 V (max)
T
WU
Wake-up Time C
B
= 10µF 440 ms
150 °C (min)
TSD Thermal Shutdown Temperature 170
190 °C (max)
P
O
Output Power f = 1kHz
R
L
= 4Ω SE, Single Channel, THD+N
3.0 W (min)
= 1% 3.1
R
L
= 8Ω BTL, THD+N = 10% 7.5
P
O
= 2.5Wrms; f = 1kHz;
0.05
R
L
= 4Ω SE
THD+N Total Harmomic Distortion + Noise %
P
O
= 2.5Wrms; A
V
= 10; f = 1kHz; R
L
0.14
= 4Ω, SE
ε
OS
Output Noise A-Weighted Filter, V
IN
= 0V,
10 µV
Input Referred
X
TALK
Channel Separation f
IN
= 1kHz, P
O
= 1W, SE Mode
R
L
= 8Ω 76 dB
R
L
= 4Ω 70
PSRR Power Supply Rejection Ratio V
RIPPLE
= 200mV
p-p
, f = 1kHz,
70 56 dB (min)
R
L
= 8Ω, BTL
I
OL
Output Current Limit V
IN
= 0V, R
L
= 500mΩ 5 A
(1) All voltages are measured with respect to the GND pin, unless otherwise specified.
(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 ensure specific performance limits. Electrical Characteristics VDD = 12V state DC and AC
electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within
the Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good
indication of device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to AOQL (Average Outgoing Quality Level).
(5) Datasheet min/max specification limits are specified by design, test, or statistical analysis.
(6) 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.
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