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LM4947 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM4947
Description  Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and National 3D
PDF  32 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4947 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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Electrical Characteristics 5V (Notes 2, 7) (Continued)
The following specifications apply for V
DD = 5V, 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
70
dB
BTL, Output Mode 3
61
dB
BTL, Output Mode 5
64
dB
BTL, Output Mode 7
61
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
72
dB
SE, Output Mode 4
70
dB
SE, Output Mode 6
65
dB
OCL, Output Mode 2
76
dB
OCL, Output Mode 4
72
dB
OCL, Output Mode 6
70
dB
η
Class D Efficiency
Output Mode 1, 3, 5
86
%
CMRR
Common-Mode Rejection Ratio
f = 1kHz, V
CM = 1Vpp, 0dB gain,
Mode 1, BTL, R
L =8
Ω
–49
dB
XTALK
Crosstalk
Headphone, P
O = 30mW, f = 1kHz,
OCL, Mode 4
–55
dB
Headphone, P
O = 30mW, f = 1kHz,
SE, Mode 4
–72
T
WU
Wake-Up Time from Shutdown
C
B = 2.2µF, OCL, RL =32
Ω
116
ms
C
B = 2.2µF, SE, RL =32
Ω
150
Volume Control Step Size Error
±0.2
dB
Digital Volume Range
Input referred maximum attenuation
-59.5
dB
Input referred maximum gain
+18
dB
Mute Attenuation
Output Mode 1, 3, 5
90
dB
MONO_IN Input Impedance
R
IN and LIN Input Impedance
Maximum gain setting
11
k
Ω
Maximum attenuation setting
100
k
Ω
www.national.com
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