ak4126 AKM Semiconductor, Inc., ak4126 Datasheet - Page 24

• Manufacturer Part Number: ak4126
• Description: 6ch 192khz / 24-bit Asynchronous Src
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Tracking to the Input Sampling Frequency
When the ILRCK is generated by an external PLL, it may take a time to settle after changing the input sampling frequency
because the response of an external PLL to the frequency change is slow. AK4126 operates normally up to 23%/sec speed
and the output data becomes incorrect at the speed of the frequency change over 23%/sec.
3. Digital Filter Response Example
Table 10 shows the examples of digital filter response performed by the AK4126.
MS0544-E-00
4.000
1.000
0.919
0.725
0.667
0.544
0.500
0.500
0.459
0.363
0.333
0.250
0.250
0.230
0.167
0.181
0.167
0.181
Ratio
FSO/FSI [kHz]
48.0/192.0
44.1/176.4
44.1/192.0
32.0/192.0
32.0/176.4
48.0/48.0
44.1/48.0
32.0/44.1
32.0/48.0
48.0/88.2
48.0/96.0
44.1/88.2
44.1/96.0
32.0/88.2
32.0/96.0
192/48.0
8/48.0
8/44.1
Passband [kHz]
22.000
22.000
20.000
14.088
13.688
19.250
20.900
19.202
18.700
12.863
12.500
17.600
16.170
15.860
11.200
10.278
2.5695
2.800
Table 10. Digital Filter Example
Stopband [kHz]
- 24 -
26.000
26.000
24.100
17.487
17.488
26.232
27.000
24.806
25.000
18.665
18.900
30.200
27.746
28.240
19.600
17.987
4.4968
4.900
Attenuation [dB]
Stopband
−121.2
−121.2
−121.4
−115.3
−116.9
−114.6
−100.2
−100.2
−103.3
−102.0
−103.6
−104.0
−104.0
−103.3
−73.2
−73.2
−73.2
−73.2
−2.97@ 3.625k
−7.88@ 3.625k
−0.01@ 14.5k
−0.19@ 14.5k
−0.75@ 14.5k
−1.07@ 14.5k
−2.97@ 14.5k
−7.88@ 14.5k
−0.01@ 20k
−0.01@ 20k
−0.01@ 20k
−0.03@ 20k
−0.01@ 20k
−0.08@ 20k
−0.23@ 20k
−0.18@ 20k
−1.34@ 20k
−1.40@ 20k
Gain [dB]
[AK4126]
2006/09