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LM49270 Datenblatt(PDF) 5 Page - Texas Instruments

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Teilenummer LM49270
Bauteilbeschribung  Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

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LM49270
www.ti.com
SNAS384B – DECEMBER 2006 – REVISED MARCH 2007
Electrical Characteristics VDD = 3.3V
(1)The following specifications apply for Headphone: A
V = 0dB, RL(HP) = 32Ω; for Loudspeakers: AV = 6dB, RL(SP) = 15μH + 8Ω
+ 15
μH , f = 1kHz, unless otherwise specified. Limits apply for TA = 25°C.
LM49270
Units
Symbol
Parameter
Conditions
(Limits)
Typical (2)
Limit(3) (4)
VIN = 0, RL = No Load,
Both channels active
IDD
Supply Current
Speaker ON, HP OFF
5.5
7.6
mA (max)
Speaker OFF, CC HP ON
3
4.7
mA (max)
Speaker OFF, OCL HP ON
4
5.75
mA (max)
ISD
Shutdown Supply Current
0.02
2
μA (max)
Headphone
10
25
mV (max)
VOS
Output Offset Voltage
Speaker
10
60
mV (max)
Speaker Mode, f = 1kHz
THD+N = 1%
RL = 4Ω
700
mW
RL = 8Ω
450
400
mW (min)
THD+N = 10%
RL = 4Ω
870
mW
RL = 8Ω
560
mW
CC Headphone Mode, f = 1kHz
THD+N = 1%
RL = 16Ω
60
mW
POUT
Output Power
RL = 32Ω
36
30
mW (min)
THD+N = 10%
RL = 16Ω
74
mW
RL = 32Ω
55
mW
OCL Headphone Mode, f = 1kHz
THD+N = 1%
RL = 16Ω
60
mW
RL = 32Ω
36
30
mW (min)
THD+N = 10%
RL = 16Ω
73
mW
RL = 32Ω
55
mW
Speaker Mode, f = 1kHz
POUT = 100mW, RL = 8Ω
0.02
%
CC Headphone Mode,
f = 1kHz
THD+N
Total Harmonic Distortion + Noise
POUT = 12mW, RL = 32Ω
0.015
%
OCL Headphone Mode,
f = 1kHz
POUT = 12mW, RL = 32Ω
0.02
%
Speaker Mode,
47
μV
A-Wtg, Input Referred
CC Headphone Mode,
eN
Noise
10
μV
A-Wtg, Input Referred
OCL Headphone Mode, A-Wtg,
11
μV
Input Referred
Speaker Mode
η
Efficiency
84
%
RL = 8Ω
Speaker Mode,
71
dB
f = 1kHz, VIN = 1Vp-p
CC Headphone Mode,
Xtalk
Crosstalk
70
dB
f = 1kHz, VIN = 1Vp-p
OCL Headphone Mode,
55
dB
f = 1kHz, VIN = 1Vp-p
(1)
All voltages are measured with respect to the ground pin, unless otherwise specified.
(2)
Typicals are measured at 25°C and represent the parametric norm.
(3)
Limits are specified to AOQL (Average Outgoing Quality Level).
(4)
Data sheet min and max specification limits are specified by design, test, or statistical analysis.
Copyright © 2006–2007, Texas Instruments Incorporated
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