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LM4940 Datenblatt(PDF) 4 Page - Texas Instruments

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Teilenummer LM4940
Bauteilbeschribung  6W Stereo Audio Power Amplifier
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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LM4940
SNAS219B – MAY 2004 – REVISED MARCH 2011
www.ti.com
ELECTRICAL CHARACTERISTICS VDD = 12V
(1) (2)
The following specifications apply for VDD = 12V, AV = 10, RL = 4Ω, f = 1kHz unless otherwise specified. Limits apply for TA =
25°C.
LM4940
Units
Symbol
Parameter
Conditions
(Limits)
Typical(3)
Limit(4)(5)
IDD
Quiescent Power Supply Current
VIN = 0V, IO = 0A, No Load
16
40
mA (max)
ISD
Shutdown Current
VSHUTDOWN = GND
(6)
40
100
µA (max)
2.0
V (min)
VSDIH
Shutdown Voltage Input High
VDD/2
V (max)
VSDIL
Shutdown Voltage Input Low
0.4
V (max)
Single Channel
THD+N = 1%
3.1
2.8
PO
Output Power
W (min)
THD+N = 10%
4.2
VDD = 14.4V, THD+N = 10%
6.0
THD+N
Total Harmomic Distortion + Noise
PO = 1WRMS, AV = 10, f = 1kHz
0.15
%
A-Weighted Filter, VIN = 0V,
εOS
Output Noise
10
µV
Input Referred
XTALK
Channel Separation
PO = 1W
70
dB
VRIPPLE = 200mVp-p
PSRR
Power Supply Rejection Ratio
56
dB
fRIPPLE = 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.
(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.
TYPICAL APPLICATION
Figure 2. Typical Stereo Audio Amplifier Application Circuit
4
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