SM5865CM Datasheet, PDF (13/20 Pages) Nippon Precision Circuits Inc – D/A Converter for Digital Audio

SM5865CM
Theoretical Quantization Noise Reduction
The SM5865CM employs a 3rd-order 31-level quantized noise shaper to widely reduce quantization noise in
the audio band to the high frequency bandwidth. The theoretical quantization noise level at 16fs to 96fs opera-
tion is shown in figure 11.
0
10
0 dB sine wave equivalent white noise level
20
30
40
16-bit, fs quantization noise level
50
60
70
80
90
100
110
120
130
20-bit, fs quantization noise level
140
150
160
24-bit, fs quantization noise level
170
180
0
0.5
1
1.5
2
2.5
3
3.5
Frequency (fs)
Figure 11. Theoretical quantization noise level
16fs
24fs
32fs
48fs
64fs
96fs
4
NIPPON PRECISION CIRCUITS—13