Texas Instruments 6W Stereo Audio Power Amplifier LM4940TSBD/NOPB LM4940TSBD/NOPB Datenbogen
Produktcode
LM4940TSBD/NOPB
SNAS219C – OCTOBER 2003 – REVISED MAY 2013
ELECTRICAL CHARACTERISTICS V
DD
= 12V
(1) (2)
The following specifications apply for V
DD
= 12V, A
V
= 10, R
L
= 4
Ω
, f = 1kHz unless otherwise specified. Limits apply for T
A
=
25°C.
LM4940
Units
Symbol
Parameter
Conditions
(Limits)
Typical
(3)
Limit
(4) (5)
I
DD
Quiescent Power Supply Current
V
IN
= 0V, I
O
= 0A, No Load
16
40
mA (max)
I
SD
Shutdown Current
V
SHUTDOWN
= GND
(6)
40
100
µA (max)
2.0
V (min)
V
SDIH
Shutdown Voltage Input High
V
DD
/2
V (max)
V
SDIL
Shutdown Voltage Input Low
0.4
V (max)
Single Channel
THD+N = 1%
3.1
2.8
P
O
Output Power
W (min)
THD+N = 10%
4.2
V
DD
= 14.4V, THD+N = 10%
6.0
THD+N
Total Harmomic Distortion + Noise
P
O
= 1W
RMS
, A
V
= 10, f = 1kHz
0.15
%
A-Weighted Filter, V
IN
= 0V,
ε
OS
Output Noise
10
µV
Input Referred
X
TALK
Channel Separation
P
O
= 1W
70
dB
V
RIPPLE
= 200mV
p-p
PSRR
Power Supply Rejection Ratio
56
dB
f
RIPPLE
= 1kHz
(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 state DC and AC electrical
specifications under particular test conditions which ensure performance limits. This assumes that the device is within the Operating
Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device
performance.
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure performance limits. This assumes that the device is within the Operating
Ratings. Specifications are not ensured 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.
minimum shutdown current.
TYPICAL APPLICATION
Figure 2. Typical Stereo Audio Amplifier Application Circuit
4
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