
DSD1792
SLES067B MARCH 2003 REVISED NOVEMBER 2006
www.ti.com
39
ANALOG FIR FILTER PERFORMANCE IN DSD MODE
Figure 43. DSD Filter-1, Low BW
f – Frequency – kHz
6
5
4
3
2
1
0
50
100
150
200
Gain
–
dB
GAIN
vs
FREQUENCY
Figure 44. DSD Filter-1, High BW
f – Frequency – kHz
60
50
40
30
20
10
0
500
1000
1500
Gain
–
dB
GAIN
vs
FREQUENCY
fc = 185 kHz
Gain(1) = –6.6 dB
Figure 45. DSD Filter-2, Low BW
f – Frequency – kHz
6
5
4
3
2
1
0
50
100
150
200
Gain
–
dB
GAIN
vs
FREQUENCY
Figure 46. DSD Filter-2, High BW
f – Frequency – kHz
60
50
40
30
20
10
0
500
1000
1500
Gain
–
dB
GAIN
vs
FREQUENCY
fc = 77 kHz
Gain(1) = –6 dB
(1) This gain is in comparison to PCM 0 dB, when the DSD input signal efficiency is 50%.
All specifications at DBCK = 2.8224 MHz (44.1 kHz
× 64 fS), and 50% modulation DSD data input, unless otherwise noted.