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LM4819MBD Datasheet(PDF) 4 Page - Texas Instruments

No. de pieza LM4819MBD
Descripción Electrónicos  350mW Audio Power Amplifier with Shutdown Mode
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM4819MBD Datasheet(HTML) 4 Page - Texas Instruments

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LM4819, LM4819MBD
SNAS133C – MAY 2004 – REVISED OCTOBER 2004
www.ti.com
Electrical Characteristics VDD = 5V
(1) (2)
The following specifications apply for VDD = 5V, RL = 16Ω unless otherwise stated. Limits apply for TA = 25°C.
LM4819
Units
Parameter
Test Conditions
(Limits)
Typical(3)
Limit(4)(5)
IDD
Quiescent Power Supply Current
VIN = 0V, Io = 0A
1.5
3.0
mA (max)
ISD
Shutdown Current
VPIN1 = VDD
(6)
1.0
5.0
µA (max)
VSDIH
Shutdown Voltage Input High
4.0
V (min)
VSDIL
Shutdown Voltage Input Low
1.0
V (max)
VOS
Output Offset Voltage
VIN = 0V
5
50
mV (max)
THD = 10%, fIN = 1kHz
350
mW
PO
Output Power
THD = 10%, fIN = 1kHz, RL = 8Ω
300
mW
THD+N
Total Harmonic Distortion + Noise
PO = 270mWRMS, AVD = 2, fIN = 1kHz
1
%
(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's performance.
(3)
Typical specifications are specified at 25°C and represent the parametric norm.
(4)
Tested limits are guaranteed to TI's AOQL (Average Outgoing Quality Level).
(5)
Datasheet min/max specification limits are guaranteed by designs, test, or statistical analysis.
(6)
The shutdown pin (pin1) should be driven as close as possible to VDD for minimum current in Shutdown Mode.
Electrical Characteristics VDD = 3V
(1) (2)
The following specifications apply for VDD = 3V and RL = 16Ω load unless otherwise stated. Limits apply to TA = 25°C.
LM4819
Units
Parameter
Test Conditions
(Limits)
Typical(3)
Limit(4)(5)
IDD
Quiescent Power Supply Current
VIN = 0V, Io = 0A
1.0
3.0
mA (max)
ISD
Shutdown Current
VPIN1 = VDD
(6)
0.7
5.0
µA (max)
VSDIH
Shutdown Voltage Input High
2.4
V (min)
VSDIL
Shutdown Voltage Input Low
0.6
V (max)
VOS
Output Offset Voltage
VIN = 0V
5
50
mV
THD = 10%, fIN = 1kHz
110
mW
PO
Output Power
THD = 10%, fIN = 1kHz, RL = 8Ω
90
mW
THD+N
Total Harmonic Distortion + Noise
PO = 80mWRMS, AVD = 2, fIN = 1kHz
1
%
(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's performance.
(3)
Typical specifications are specified at 25°C and represent the parametric norm.
(4)
Tested limits are guaranteed to TI's AOQL (Average Outgoing Quality Level).
(5)
Datasheet min/max specification limits are guaranteed by designs, test, or statistical analysis.
(6)
The shutdown pin (pin1) should be driven as close as possible to VDD for minimum current in Shutdown Mode.
External Components Description
(See Figure 1)
Components
Functional Description
1.
Ri
Combined with Rf, this inverting input resistor sets the closed-loop gain. Ri also forms a high pass filter with Ci at fc =
1/(2
πRiCi).
2.
Ci
This input coupling capacitor blocks DC voltage at the amplifier's terminals. Combined with Ri, it creates a high pass
filter with Ri at fc = 1/(2πRiCi). Refer to the section, Proper Selection of External Components for an explanation of how
to determine the value of Ci.
3.
Rf
Combined with Ri, this is the feedback resistor that sets the closed-loop gain: Av = 2(RF/Ri).
4
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Copyright © 2004, Texas Instruments Incorporated
Product Folder Links: LM4819 LM4819MBD


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