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LM4947 Arkusz danych(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Numer części LM4947
Szczegółowy opis  Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and National 3D
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4947 Arkusz danych(HTML) 5 Page - National Semiconductor (TI)

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Electrical Characteristics 3.3V (Notes 2, 7) (Continued)
The following specifications apply for V
DD = 3.3V, TA = 25˚C, and all gains are set for 0dB unless otherwise specified.
Symbol
Parameter
Conditions
LM4947
Units
(Limits)
Typical
(Note 4)
Limits
(Note 5)
PSRR
Power Supply Rejection Ratio
Loudspeaker out
V
RIPPLE = 200mVPP; f = 217Hz,
R
L =8
Ω,C
B = 2.2µF, BTL
All audio inputs terminated to GND;
output referred
BTL, Output Mode 1
79
dB
BTL, Output Mode 3
78
dB
BTL, Output Mode 5
79
dB
BTL, Output Mode 7
80
dB
Power Supply Rejection Ratio
R
OUT and LOUT
V
RIPPLE = 200mVPP; f = 217Hz,
R
L =32
Ω,C
B = 2.2µF, BTL
All audio inputs terminated to GND;
output referred
SE, Output Mode 2
78
dB
SE, Output Mode 4
71
dB
SE, Output Mode 6
71
dB
OCL, Output Mode 2
83
dB
OCL, Output Mode 4
74
dB
OCL, Output Mode 6
74
dB
η
Class D Efficiency
Output Mode 1, 3, 5
86
%
CMRR
Common-Mode-Rejection Ratio
f = 217Hz, V
CM = 1Vpp,
Mode 1, BTL, R
L =8
–49
dB
XTALK
Crosstalk
Headphone, P
O = 12mW,
f = 1kHz, OCL, Mode 4, R
L =32
–58
dB
Headphone, P
O = 12mW,
f = 1kHz, SE, Mode 4, R
L =32
–73
T
WU
Wake-Up Time from Shutdown
C
B = 2.2µF, OCL, RL =32
90
ms
C
B = 2.2µF, SE, RL =32
115
Volume Control Step Size Error
±0.2
dB
Digital Volume Range
Input referred maximum attenuation
-59.5
–60.25
–58.75
dB (min)
dB (max)
Input referred maximum gain
+18
17.25
18.75
dB (min)
dB (max)
Mute Attenuation
Output Mode 1, 3, 5
87
dB
MONO_IN Input Impedance
R
IN and LIN Input Impedance
Maximum gain setting
12
8
14
k
Ω (min)
k
Ω (max)
Maximum attenuation setting
100
75
125
k
Ω (min)
k
Ω (max)
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