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LM4931 bảng dữ liệu(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM4931
Giải thích chi tiết về linh kiện  Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
PDF  47 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
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LM4931 bảng dữ liệu(HTML) 9 Page - National Semiconductor (TI)

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Electrical Characteristics DV
DD = 3.3V, AVDD = 5V, 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)
V
FS
Full-Scale Output Voltage (Mono
speaker amplifie)r
8
Ω load, 0dB gain setting
2.6
V
P-P
THD+N
Total Harmonic Distortion + Noise
f
OUT = 1kHz, POUT = 400mW
0.16
%
P
OLS
Loudspeaker Amplifier Output
Power
THD = 1%, f
OUT = 1kHz
1.1
W
PSRR
Power Supply Rejection Ratio
(Loudspeaker Amplifier)
C
B = 1.0µF
V
RIPPLE = 200mVPP
f
RIPPLE = 217Hz
56
dB
SNR (Voice)
Signal-to-Noise Ratio of Voice
Channel (Loudspeaker Amplifier)
Signal = V
O at 0dBFS, f = 1kHz
Noise = digital zero, A-weighted
0dB gain setting (Note 10)
f
MCLK = 12.288MHz, PLL disabled
70
dB
f
MCLK = 12MHz, PLL active
69
dB
SNR (Music)
Signal-to-Noise Ratio of Music
Channel (Loudspeaker Amplifier)
Signal = V
O at 0dBFS, f = 1kHz
Noise = digital zero, A-weighted
0dB gain setting (Note 10)
f
MCLK = 12.288MHz, PLL disabled
74
dB
f
MCLK = 12MHz, PLL active
73
dB
A-Weighted filter, V
IN= digital zero (Note
10)
e
N (Music)
Output Noise
f
MCLK = 12.288MHz, PLL disabled
250
µV
f
MCLK = 12MHz, PLL active
320
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
1.5
dB
Headphone Amplifier
V
FS
Full-Scale Output Voltage
(Headphone Amplifier)
32
Ω stereo 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
0.05
%
P
OHP
Output Power (Headphone
Amplifier)
THD = 0.5%, f
OUT = 1kHz
26
20
mW (min)
PSRR
Power Supply Rejection Ratio
(Headphone Amplifier)
C
B = 1.0µF
V
RIPPLE = 200mVPP
f
RIPPLE = 217Hz
70
dB
SNR (Voice)
Signal-to-Noise Ratio of Voice
Channel (Headphone Amplifier)
Signal = V
O at 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 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
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