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LM4949 Datasheet(PDF) 11 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4949
Description  Stereo Class D Audio Subsystem with OCL Headphone Amplifier
PDF  40 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4949 Datasheet(HTML) 11 Page - National Semiconductor (TI)

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Electrical Characteristics V
DD = 5.0V (Notes 1, 2) The following specifications apply for AV = 0dB,
RL(SP) =15µH+8
Ω + 15µH, R
L(HP) =32
Ω, f = 1kHz unless otherwise specified. Limits apply for T
A = 25˚C. (Continued)
Symbol
Parameter
Conditions
LM4949
Units
(Limits)
Typical
Limit
(Note 6)
(Notes 7, 8)
THD + N Total Harmonic Distortion + Noise
Single-Ended Input Mode, f = 1kHz
HP Mode, R
L =16
Ω,P
OUT =
100mW
OCL
CC
0.021
0.02
%
%
HP Mode, R
L =32
Ω,P
OUT = 50mW
OCL
CC
0.02
0.017
%
%
LS Mode
R
L =4
Ω,P
OUT =1W
R
L =8
Ω,P
OUT = 600mW
0.05
0.033
%
%
e
N
Noise
Differential Input, A-weighted, Input Referred
Mono Input
OCL
CC
LS
16.4
15.5
43
µV
µV
µV
All Inputs ON
OCL
CC
LS
29.8
29.2
46.6
µV
µV
µV
Single-Ended Input, A-weighted, Input Rrferred
Stereo Input
OCL
CC
LS
12
11
45
µV
µV
µV
All Inputs ON
OCL
CC
LS
23.7
22.9
52
µV
µV
µV
η
Efficiency
LS Mode, P
OUT = 1W, RL =8
Ω
87.4
%
Xtalk
Crosstalk
LS Mode, f = 1kHz, R
L =8
Ω,V
IN =1VP-P
Differential Input Mode
105.8
dB
OCL HP Mode, f = 1kHz, R
L =32
Ω,V
IN =1VP-P
Differential Input Mode
69.6
dB
T
ON
Turn on Time
CC Mode
OCL Mode
LS Mode
89
14
35
ms
ms
ms
T
OFF
Turn off Time
From any mode
716
ms
Z
IN
Input Impedance
Maximum Gain
Minimum Gain
24.8
222.7
k
Ω
k
Ω
www.national.com
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