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參數(shù)資料
| 型號(hào)： | SM5865AM |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | D/A Converter |
| 中文描述： | D / A轉(zhuǎn)換 |
| 文件頁(yè)數(shù)： | 9/17頁(yè) |
| 文件大?。?/td> | 130K |
| 代理商： | SM5865AM |
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SM5865AM
NIPPON PRECISION CIRCUITS—9
FUNCTIONAL DESCRIPTION
Quantization Noise Reduction
The SM5865AM employs a 3rd-order 23-level quantizer noise shaper to effectively reduce quantization noise
in the audio band. The quantization noise component at 16fs to 96fs operation is shown in figure 1.
Internal Oversampling Operation
The SM5865AM accepts data output from an 8-times or 4-times oversampling digital filter, and oversampled
internally again up to the noise shaper operating rate. The internal oversampling factor is determined automati-
cally from the system clock input frequency and the input sampling frequency. This internal oversampling fac-
tor (n) must be an integer satisfying the conditions shown in table 1.
Figure 1. Quantization noise level
Table 1. Operating conditions
Parameter
CKDVN = HIGH
CKDVN = LOW
f
WCKI
and f
CKI
compulsory conditions
1
1. f
WCKI
= word clock frequency, f
CKI
= input systemclock frequency, n = internal oversampling factor
where n = 1, 2, 3, ...
where n = 1, 2, 3, ...
Noise shaper operating frequency
0.5
1
1.5
2
2.5
3
3.5
4
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0
Frequency (fs)
Quantization noise
(dB)
16fs
24fs
32fs
48fs
64fs
96fs
0 dB sine wave equivalent white noise level
16-bit, fs quantization noise level
20-bit, fs quantization noise level
24-bit, fs quantization noise level
f
CKI
f
WCKI
8
×
n
×
=
f
CKI
f
WCKI
16
×
n
×
=
f
ns
f
WCKI
n
f
8
----------
=
×
=
f
ns
f
WCKI
n
f
16
----------
=
×
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SM5865CM | D/A Converter for Digital Audio |
| SM5866AS | D/A Converter for DSD and PCM |
| SM5871A | CMOS LSI(Digital Audio D/A Converter) |
| SM5872 | CMOS LSI(Digital D/A Converters with Built-in Digital Filters |
| SM5872A | CMOS LSI(Digital D/A Converters with Built-in Digital Filters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM5865BM | 制造商:NPC 制造商全稱(chēng):Nippon Precision Circuits Inc 功能描述:D/A Converter for Digital Audio |
| SM5865CM | 制造商:NPC 制造商全稱(chēng):Nippon Precision Circuits Inc 功能描述:D/A Converter for Digital Audio |
| SM5866AS | 制造商:NPC 制造商全稱(chēng):Nippon Precision Circuits Inc 功能描述:D/A Converter for DSD and PCM |
| SM586A181LEVCN | 制造商:Schneider Electric 功能描述:Proximity Sensor Ultrasonic |
| SM5871A | 制造商:NPC 制造商全稱(chēng):Nippon Precision Circuits Inc 功能描述:CMOS LSI(Digital Audio D/A Converter) |
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