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LM4928 Folha de dados(PDF) 6 Page - Texas Instruments

Nome de Peças LM4928
Descrição Electrónicos  Audio Power Amplifier Series 1.2 Watt Stereo Fully Differential Audio Amplifier with RF Suppression and Shutdown Low
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM4928 Folha de dados(HTML) 6 Page - Texas Instruments

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LM4928
SNAS330D – DECEMBER 2005 – REVISED FEBRUARY 2006
www.ti.com
Electrical Characteristics VDD = 3V
(1) (2)
The following specifications apply for VDD = 3V, AV = 1, and 8Ω load unless otherwise specified. Limits apply for TA = 25°C.
LM4928
Units
Symbol
Parameter
Conditions
(Limits)
Typical(3)
Limit(4)
IDD
Quiescent Power Supply Current
VIN = 0V, no load
3.5
VIN = 0V, RL = 8Ω
3.5
mA
(Both amplifiers)
ISD
Shutdown Current
VSHUTDOWN = GND
0.1
1
µA (max)
(Both amplifiers)
THD = 1% (max); f = 1 kHz
RL = 4Ω
0.55
RL = 8Ω
0.40
W
Po
Output Power
THD = 10% (max); f = 1 kHz
RL = 4Ω
0.68
RL = 8Ω
0.50
W
THD+N
Total Harmonic Distortion + Noise
Po = 0.25Wrms; f = 1kHz
0.05
%
Vripple = 200mV sine p-p
PSRR
Power Supply Rejection Ratio
f = 217Hz(5)
90
dB
f = 1kHz(5)
90
CMRR
Common-Mode Rejection Ratio
f = 217Hz, VCM = 200mVpp
70
50
dB (min)
VOS
Output Offset
VIN = 0V
4
18
mV (max)
VSDIH
Shutdown Voltage Input High
1.4
V
VSDIL
Shutdown Voltage Input Low
0.4
V
SNR
Signal-to-Noise Ratio
PO = 0.4W, f = 1kHz
105
dB
TWU
Wake-up time from Shutdown
Cbypass = 1
μF
9
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 ensure specific performance limits. Electrical Characteristics 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 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 Texas Instruments' AOQL (Average Outgoing Quality Level).
(5)
Inputs are AC terminated to GND.
External Components Description
(See 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 POWER SUPPLY BYPASSING section 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 © 2005–2006, Texas Instruments Incorporated
Product Folder Links: LM4928


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