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LM4931 データシート(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部品番号 LM4931
部品情報  Audio Subsystem with Mono High Efficiency Loudsperker and Stereo Headphone Amplifiers
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4931 データシート(HTML) 6 Page - National Semiconductor (TI)

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Electrical Characteristics DV
DD = 3V, AVDD = 3V, RLHP =32Ω,RLHF =8Ω
(Notes 1, 2) (Continued)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A = 25˚C.
Symbol
Parameter
Conditions
LM4931
Units
(Limits)
Typical
(Note 6)
Limits
(Note 7)
f
MCLK = 12MHz, PLL active
70
dB
SNR (Music)
Signal-to-Noise Ratio of Music
Channel (Loudspeaker Amplifier)
Output Noise
Signal = V
O at 0dBFS, f = 1kHz,
Noise = digital zero, A-weighted,
0dB gain setting (Note 10)
f
MCLK = 12.288MHz, PLL disabled
78
dB
f
MCLK = 12MHz, PLL active
76
dB
e
N (Music)
Output Noise
A-weighted filter, V
in = digital zero (Note
10)
f
MCLK = 12.288MHz, PLL disabled
120
µV
f
MCLK = 12MHz, PLL active
140
µV
V
OS
Offset Voltage
10
mV
VCR
Volume Control Range
(Loudspeaker Amplifier)
Minimum Gain
–34.5
dB
Maximum Gain
12
dB
SS
Volume Control Step Size
(Loudspeaker Amplifier)
1.5
dB
Headphone Amplifier
V
FS
Full Scale Ouput Voltage
(Headphone Amplifier)
32
Ω load, 0dB gain setting
2.6
V
P-P
THD+N
Total Harmonic Distortion + Noise
(Headphone Amplifier)
f
IN = 1kHz, POUT = 7.5mW,
32
Ω stereo load
0.04
%
P
OHP
Output Power (Headphone
Amplifier)
THD = 0.5%, f
OUT = 1KHz
26
19
mW (min)
PSRR
Power Supply Rejection Ratio
(Headphone Amplifier)
C
B = 1.0µF
V
RIPPLE = 200mVPP
f
RIPPLE = 217Hz
62
dB
SNR (Voice)
Signal-to-Noise Ratio of Voice
Channel (Headphone Amplifier)
Signal = V
O at 0dBFS, f = 1kHz and 1%
THD+N,
Noise = digital zero, A-weighted,
0dB gain setting (Note 10)
f
MCLK = 12.288MHz, PLL disabled
75
dB
f
MCLK = 12MHz, PLL active
73
dB
SNR (Music)
Signal-to-Noise Ratio of Music
Channel (Headphone Amplifier)
Signal = V
O at 0dBFS, f = 1kHz and 1%
THD+N,
Noise = digital zero, A-weighted,
0dB gain setting (Note 10)
f
MCLK = 12.288MHz, PLL disabled
86
dB
f
MCLK = 12MHz, PLL active
82
dB
X
TALK
Stereo Channel-to-Channel
Crosstalk
f
S = 48kHz,
f
IN = 1kHz sinewave at –3dBFS
62
dB
∆A
CH-CH
Stereo Channel-to-Channel Gain
Mismatch
0.3
dB
e
N (Music)
Output Noise
A-weighted filter,
Vin = digital zero (Note 10)
f
MCLK = 12.288MHz, PLL disabled
45
µV
f
MCLK = 12MHz, PLL active
65
µV
www.national.com
6


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