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LM4949 Datasheet(PDF) 6 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) 6 Page - National Semiconductor (TI)

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Electrical Characteristics V
DD = 3.0V (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)
Z
IN
Input Impedance
Maximum Gain
Minimum Gain
24.8
222.7
k
Ω
k
Ω
A
V
Gain
Volume Control
Minimum Gain
Maximum Gain
–57
18
dB
dB
LS Second Gain Stage
Step 0
Differential Input
Single-Ended Input
6
12
dB
dB
Step 1
Differential Input
Single-Ended Input
4
10
dB
dB
Step 2
Differential Input
Single-Ended Input
2
8
dB
dB
Step 3
Differential Input
Single-Ended Input
0
6
dB
dB
HP Second Gain Stage
Step 0
Step 1
Step 2
0
-6
-12
dB
dB
dB
Mute
Mute Attenuation
Speaker Mode
–103
dB
Headphone Mode
–123
dB
CMRR
Common Mode Rejection Ratio
Speaker Mode, f = 1kHz,
V
IN = 200mVP-P
66.1
dB
OCL Headphone Mode, f = 1kHz,
V
IN = 200mVP-P
70
dB
PSRR
Power Supply Rejection Ratio
Differential Input Mode, V
RIPPLE = 200mVP-P
OCL HP Mode, f = 217Hz
OCL HP Mode, f = 1kHz
LS Mode, f = 217Hz
LS Mode, f = 1kHz
78.1
75.4
74
72.9
dB
dB
dB
dB
PSRR
Power Supply Rejection Ratio
Single-Ended Input Mode, V
RIPPLE = 200mVP-P
OCL HP Mode, f = 217Hz
OCL HP Mode, f = 1kHz
LS Mode, f = 217Hz
LS Mode, f = 70.31kHz72.8
77.5
81
69
81
dB
dB
dB
dB
PSRR
Power Supply Rejection Ratio
All Inputs ON, Single-Ended Input Mode, V
RIPPLE = 200mVP-P
OCL HP Mode, f = 217Hz
OCL HP Mode, f = 1kHz
LS Mode, f = 217Hz
LS Mode, f = 1kHz
66.1
70.5
65.4
72.2
dB
dB
dB
dB
www.national.com
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