Datasheet


SLES101A – DECEMBER 2003 – REVISED NOVEMBER 2006
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39
ANALOG FIR FILTER PERFORMANCE IN DSD MODE
Figure 41. DSD Filter-1, Low BW
f – Frequency – kHz
−6
−5
−4
−3
−2
−1
0
0 50 100 150 200
Gain – dB
GAIN
vs
FREQUENCY
Figure 42. DSD Filter-1, High BW
f – Frequency – kHz
−60
−50
−40
−30
−20
−10
0
0 500 1000 1500
Gain – dB
GAIN
vs
FREQUENCY
f
c
= 185 kHz
Gain
(1)
= –6.6 dB
Figure 43. DSD Filter-2, Low BW
f – Frequency – kHz
−6
−5
−4
−3
−2
−1
0
0 50 100 150 200
Gain – dB
GAIN
vs
FREQUENCY
Figure 44. DSD Filter-2, High BW
f – Frequency – kHz
−60
−50
−40
−30
−20
−10
0
0 500 1000 1500
Gain – dB
GAIN
vs
FREQUENCY
f
c
= 90 kHz
Gain
(1)
= 0.3 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 f
S
), and 50% modulation DSD data input, unless otherwise noted.