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LM4947 Datasheet(PDF) 8 Page - Texas Instruments

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Part No. LM4947
Description  Mono Class D and Stereo Audio Sub-System
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LM4947 Datasheet(HTML) 8 Page - Texas Instruments

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LM4947, LM4947TLEVAL
SNAS349D – JUNE 2006 – REVISED MAY 2013
www.ti.com
ELECTRICAL CHARACTERISTICS 5V
(1)(2) (continued)
The following specifications apply for VDD = 5V, TA = 25°C and all gains are set for 0dB unless otherwise specified.
Symbol
Parameter
Conditions
LM4947
Units
(Limits)
Typical(3)
Limits(4)
VRIPPLE = 200mVPP; f = 217Hz,
RL = 8Ω, CB = 2.2µF, BTL
All audio inputs terminated to GND;
output referred
Power Supply Rejection Ratio
BTL, Output Mode 1
70
dB
Loudspeaker out
BTL, Output Mode 3
61
dB
BTL, Output Mode 5
64
dB
BTL, Output Mode 7
61
dB
VRIPPLE = 200mVPP; f = 217Hz,
PSRR
RL = 32Ω, CB = 2.2µF, BTL
All audio inputs terminated to GND;
output referred
SE, Output Mode 2
72
dB
Power Supply Rejection Ratio
SE, Output Mode 4
70
dB
ROUT and LOUT
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
%
f = 1kHz, VCM = 1Vpp, 0dB gain,
CMRR
Common-Mode Rejection Ratio
–49
dB
Mode 1, BTL, RL = 8Ω
Headphone, PO = 30mW, f = 1kHz,
–55
dB
OCL, Mode 4
XTALK
Crosstalk
Headphone, PO = 30mW, f = 1kHz,
–72
dB
SE, Mode 4
CB = 2.2μF, OCL, RL = 32Ω
116
ms
TWU
Wake-Up Time from Shutdown
CB = 2.2μF, SE, RL = 32Ω
150
ms
Volume Control Step Size Error
±0.2
dB
Input referred maximum attenuation
-59.5
dB
Digital Volume Range
Input referred maximum gain
+18
dB
Mute Attenuation
Output Mode 1, 3, 5
90
dB (min)
k
Ω (min)
Maximum gain setting
11
k
Ω (max)
MONO_IN Input Impedance
RIN and LIN Input Impedance
k
Ω (min)
Maximum attenuation setting
100
k
Ω (max)
8
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Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4947 LM4947TLEVAL


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