參數(shù)資料
型號(hào)： LM4931
廠商： National Semiconductor Corporation
英文描述： Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
中文描述： 與單聲道音頻子系統(tǒng)高效揚(yáng)聲器和立體聲耳機(jī)放大器
文件頁(yè)數(shù)： 7/47頁(yè)
文件大?。?/td> 1640K
代理商： LM4931
Electrical Characteristics DV
DD
= 3V, AV
DD
= 3V, R
LHP
= 32
, R
LHF
= 8
(Notes 1, 2) (Continued)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4931
Units
(Limits)
Typical
(Note 6)
Limits
(Note 7)
VCR
Volume Control Range
(Headphone Amplifier)
Volume Control Stepsize
(Headphone Amplifier)
Minimum Gain
Maximum Gain
–46.5
0
1.5
dB
dB
dB
SS
Microphone Amplifier
V
BIAS
Mic Bias Voltage
Gain Control Range (Microphone
Amplifier)
Gain Control Stepsize
(Microphone Amplifier)
Voice Codec (Typical numbers are with 1.024MHz voice clock and 8kHz sampling frequency)
R
VDAC
Voice DAC Ripple
R
VADC
Voice ADC Ripple
PB
VDAC
Voice DAC Passband
SBA
VDAC
Voice DAC Stopband Attenuation
UPB
VDAC
Upper Passband Cutoff Frequency Upper – 3dB Point
LPB
VDAC
Lower Passband Cutoff Frequency Lower – 3dB Point
SBA
VADC
Voice ADC Stopband Attenuation
SBA
NOTCH
Voice ADC Notch Attenuation
2
6
V
dB
dB
dB
GCR
Minimum Gain
Maximum Gain
36
2
SS
300Hz-3.3kHz through headphone output.
300Hz-3.3kHz through headphone output.
–3dB Point
Above 4kHz
+/- 0.15
+/- 0.25
3.46
72
3.47
0.230
65
58
dB
dB
kHz
dB
kHz
kHz
dB
dB
Above 4kHz
Centered on 55Hz, figure gives worst
case attenuation for 50Hz & 60Hz
Signal = V
O
at 0dBFS, f = 1kHz and 1%
THD+N,
MIC_P, MIC_N Terminated to ground,
A-weighted, 36dB MIC Preamp gain
setting (Note 10)
f
MCLK
= 12.288MHz, PLL disabled
f
MCLK
= 12MHz, PLL active
Minimum Gain
Maximum Gain
SNR (Voice)
Signal-to-Noice Ratio of Voice
Channel (Voice ADC path)
81
80
–30
0
3
dB
dB
dB
dB
dB
STR
Side Tone Range
SS
Audio DAC (Typical numbers are with 6.144MHz audio clock and 48kHz sampling frequency)
R
DAC
Audio DAC Ripple
PB
DAC
Audio DAC Passband width
SBA
DAC
Audio DAC Stop band Attenuation
DR
DAC
Audio DAC Dynamic Range
SNR
DAC
Audio DAC SNR Digital Filter
Section
PLL
f
IN
Input Frequency on MCLK pin
Side Tone Step Size
20Hz–20kHz through headphone output
–3dB point
Above 24kHz
DC – 20kHz
DC – 20kHz
+/-0.1
22.7
76
97
97
dB
kHz
dB
dB
dB
12
10
25
MHz (min)
MHz (max)
SPI/I
2
C
f
SPI
t
SPISETD
t
SPISETENB
t
SPIHOLDD
Maximum SPI Frequency
SPI Data Setup Time
SPI ENB Setup Time
SPI Data Hold Time
400
4000
100
100
100
kHz (max)
ns (min)
ns (min)
ns (min)
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LM49321 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression
LM49321RL 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression
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