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參數(shù)資料
| 型號(hào)： | SAF7847HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號(hào)轉(zhuǎn)換 |
| 英文描述： | One chip CD audio device with integrated MP3-WMA decoder |
| 中文描述： | COLOR SIGNAL DECODER, PQFP144 |
| 封裝： | 20 X 20 MM, 1.40 MM HEIGHT, SOT486-1, MS-026, PLASTIC, QFP-144 |
| 文件頁數(shù)： | 24/93頁 |
| 文件大小： | 396K |
| 代理商： | SAF7847HL |
SAF784X_2
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 9 May 2008
24 of 93
NXP Semiconductors
SAF784x
One chip CD audio device with integrated MP3/WMA decoder
The bandwidths and corresponding time-constant (t) of the decay filter are shown in
Table 4
, when the system clock frequency f
clk(sys)
is 10 MHz.
Peak detector based on window:
The functional schematic of this peak detection is
shown in
Figure 13
.
The minimum and maximum peaks of the incoming signal are measured during a
programmable window period. The highest and lowest sample within this window are used
to update maximum and minimum peaks.
The window width of the measurement is controlled via register AGCAOCControl bit
PDMEASWINDOW.
AGC and AOC control block:
The AGC control block controls the RF amplitude at the
input of the ADC by controlling the gain of an on-chip analog gain amplifier. The AOC
control block controls the RF offset at the input of the ADC by adding or subtracting the
offset just before the ADC. Both AGC and AOC loops are built up in the same manner and
are shown in
Figure 14
in their relative position within the signal conditioning block.
Table 4.
m
6
7
8
9
Decay filter time-constants at f
clk(sys)
= 10 MHz
t
m
6.35
μ
s
10
12.75
μ
s
11
25.55
μ
s
12
51.15
μ
s
13
t
102.4
μ
s
204.7
μ
s
409.6
μ
s
819.2
μ
s
m
14
15
16
17
t
1.64 ms
3.28 ms
6.55 ms
13.11 ms
m
18
19
20
21
t
26.21 ms
52.43 ms
104.8 ms
209.7 ms
Fig 13. Peak detection block with window
001aag317
max peak
window
width
0
NOISE
FILTER
min peak
HF_in
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF7847HL/M201,557 | 功能描述:音頻 DSP 1 chip CD Audio Dev w/Integrated decoder RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAF7849HL/M245,557 | 功能描述:音頻 DSP IC AUD DECODER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAF7849HL/M295,557 | 功能描述:音頻 DSP IC AUD DECODER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAF7860HL/M2,557 | 制造商:NXP Semiconductors 功能描述:DSP |
| SAF82520PVB2 | 制造商:SIEMENS 功能描述:New |
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