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SBAS451 – OCTOBER 2008
TYPICAL CHARACTERISTICS: Digital De-Emphasis Filter
All specifications at T
A
= +25°C, VCC1 = VCC2 = 5 V, VDD = 3.3 V, f
S
= 48 kHz, SCKI = 512 f
S
, 24-bit data, and Sampling
mode = Auto, unless otherwise noted.
DE-EMPHASIS CHARACTERISTIC
(f
S
= 48 kHz)
0
-
1
-
2
0
-
1
-
2
DE-EMPHASIS CHARACTERISTIC
(f
S
= 44.1 kHz)
Amplitude (dB)
-
4
-
5
-
6
-
7
-
8
-
9
-
10
0
2
4
6
8
10
12
14
16
18
20
22
Amplitude (dB)
-
3
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
0
2
4
6
8
10
12
14
16
18
20
Frequency (kHz)
Frequency (kHz)
Figure 7.
DE-EMPHASIS CHARACTERISTIC
(f
S
= 32 kHz)
0
-
1
-
2
-
10
0
Figure 8.
ANALOG FILTER CHARACTERISTIC
Amplitude (dB)
-
4
-
5
-
6
-
7
-
8
-
9
-
10
0
2
4
6
8
Frequency (kHz)
10
Amplitude (dB)
12
14
-
3
-
20
-
30
-
40
-
50
1k
10k
100k
Frequency (Hz)
1M
10M
Figure 9.
Figure 10.
Copyright © 2008, Texas Instruments Incorporated
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