參數(shù)資料
型號(hào)： LM4935WL
廠商： National Semiconductor Corporation
元件分類： ADC
英文描述： Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
中文描述： 音頻子系統(tǒng)的雙模單聲道立體聲耳機(jī)和揚(yáng)聲器放大器的高效率和多功能模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù)： 29/112頁(yè)
文件大?。?/td> 5017K
代理商： LM4935WL
12.0 Status & Control Registers
(Continued)
12.9 FURTHER NOTES ON PLL PROGRAMMING
The sigma-delta PLLis designed to drive audio circuits requiring accurate clock frequencies of up to 30 MHz with frequency errors
noise-shaped away from the audio band. The 5 bits of modulus control provide exact synchronization of 48 kHz and 44.1 kHz
sample rates from any common system clock. In systems where an isochronous I2S data stream is the source of data to the DAC
a clock synchronous to the sample rate should be used as input to the PLL (typically the I2S clock). If no isochronous source is
available then the PLL can be used to obtain a clock that is accurate to within 1 Hz of the correct sample rate although this is
highly unlikely to be a problem.
TABLE 10. Example PLL Settings for 48 kHz and 44.1 kHz Sample Rates
F
in
(MHz)
11
12.288
13
14.4
16.2
16.8
19.2
19.44
19.68
19.8
11
11.2896
12
13
14.4
16.2
16.8
19.2
19.44
19.68
19.8
F
s
(kHz)
48
48
48
48
48
48
48
48
48
48
44.1
44.1
44.1
44.1
44.1
44.1
44.1
44.1
44.1
44.1
44.1
M
11
4
13
9
27
14
13
27
21
17
11
8
5
13
12
9
17
16
14
21
11
N
60
P
5
5
5
5
5
5
5
6
5
5
5
5
5
5
5
5
5
5
5
4
5
PLL_M
10
3
12
8
26
13
12
26
20
16
10
7
4
12
11
8
16
15
13
20
10
PLL_N
60
19
60
37
100
50
40
100
64
51
55
39
22
55
45
9
30
45
39
47
30
PLL_N_MOD
0
17
0
16
0
0
20
0
1
16
4
2
31
4
30
20
25
30
22
2
204
PLL_P
4
4
4
4
4
4
4
5
4
4
4
4
4
4
4
4
4
4
4
3
4
F
out
(MHz)
12
12
12
12
12
12
12
12
12
12
11.025
11.025
11.025
11.025
11.025
11.025
11.025
11.025
11.025
11.025
11.025
19.53125
60
37.5
100
50
40.625
100
64.03125
51.5
55.125
39.0625
22.96875
55.125
45.9375
30.625
55.78125
45.9375
39.6875
47.0625
30.625
20134111
FIGURE 7. PLL Overview
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4935WLX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
LM4936 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 2W Audio Power Amplifiers with Volume Control and Selectable Control Interface (SPI or I2C)
LM49360 制造商:TI 制造商全稱:Texas Instruments 功能描述:Mono Class D Audio Codec PMU with Ground Referenced Headphone Amplifiers, Earpiece Driver, Audio DSP, 2 Step-Down DC-DC Converters, and 7 LDO Regulators
LM49360RL 制造商:TI 制造商全稱:Texas Instruments 功能描述:Mono Class D Audio Codec PMU with Ground Referenced Headphone Amplifiers, Earpiece Driver, Audio DSP, 2 Step-Down DC-DC Converters, and 7 LDO Regulators
LM49360RLX 制造商:TI 制造商全稱:Texas Instruments 功能描述:Mono Class D Audio Codec PMU with Ground Referenced Headphone Amplifiers, Earpiece Driver, Audio DSP, 2 Step-Down DC-DC Converters, and 7 LDO Regulators
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