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LM4941 bảng dữ liệu(PDF) 6 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  1.25 Watt Fully Differential Audio Power Amplifier With RF Suppression and Shutdown
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LM4941 bảng dữ liệu(HTML) 6 Page - Texas Instruments

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LM4941, LM4941SDBD, LM4941TMBD
SNAS347B – JUNE 2006 – REVISED MARCH 2007
www.ti.com
Electrical Characteristics VDD = 3V
(1) (2)
The following specifications apply for VDD = 3V, AV = 1V/V, and 8Ω load unless otherwise specified. Limits apply for TA =
25°C.
LM4941
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(3)
VIN = 0V, no load
1.6
2.2
mA (max)
(4) (5)I
DD
Quiescent Power Supply Current
VIN = 0V, RL = 8Ω
1.6
mA
ISD
Shutdown Current
VSHDN = GND
0.1
0.8
µA (max)
THD+N = 1% (max); f = 1 kHz
RL = 8Ω
0.43
W
PO
Output Power
THD+N = 10% (max); f = 1 kHz
RL = 8Ω
0.54
W
THD+N
Total Harmonic Distortion + Noise
PO = 0.25W; f = 1kHz
0.05
%
VRIPPLE = 200mVPP Sine
PSRR
Power Supply Rejection Ratio
f = 217Hz (6)
95
dB
f = 1kHz (6)
90
dB
CMRR
Common-Mode Rejection Ratio
f = 217Hz, VCM = 200mVPP Sine
70
dB
VOS
Output Offset Voltage
VIN = 0V
2
6
mV (max)
VSDIH
Shutdown Voltage Input High
1.4
V (min)
VSDIL
Shutdown Voltage Input Low
0.4
V (max)
TWU
Wake-up Time from Shutdown
CBYPASS = 1μF
8
ms
(1)
All voltages are measured with respect to the ground 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 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.
(3)
Typicals are measured at 25°C and represent the parametric norm.
(4)
Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
(5)
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
(6)
10
Ω terminated input.
External Components Description
(Figure 1)
Components
Functional Description
1.
CS
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for
information concerning proper placement and selection of the supply bypass capacitor.
2.
CB
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External
Components, for information concerning proper placement and selection of CB.
3.
Ri
Inverting input resistance which sets the closed-loop gain in conjunction with RF.
4.
RF
External feedback resistance which sets the closed-loop gain in conjunction with Ri.
6
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Copyright © 2006–2007, Texas Instruments Incorporated
Product Folder Links: LM4941 LM4941SDBD LM4941TMBD


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