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AK4127VF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29
[AK4127]
MS0593-E-02 2010/05
- 25 -
2. Jitter Tolerance
Figure 21 shows the jitter tolerance to ILRCK and IBICK. The jitter quantity is defined by the jitter frequency and the jitter
amplitude shown in
Figure 21. When the jitter amplitude is 0.01Uipp or less, the AK4127 operates normally regardless of
the jitter frequency.
(1) Normal operation
(2) There is a possibility that the distortion degrades. (It may degrade up to about −50dB.)
(3) There is a possibility that the output data is lost.
Note:
- When PLL2-0 = “L/*/*” (*: Don’t care), the jitter amplitude is for ILRCK and 1UI (Unit Interval) is one cycle of
ILRCK. When FSI = 48kHz, 1UI is 1/48kHz = 20.8μs.
- When PLL2-0 = “H/*/*” (*: Don’t care), the jitter amplitude is for IBICK and 1UI (Unit Interval) is one cycle of
IBICK. When FSI = 48kHz, 1UI is 1/(64 x 48kHz) = 326ns.
Figure 21. Jitter Tolerance
Tracking to the Input Sampling Frequency
When the ILRCK is generated by an external PLL, it may take time to settle after changing the input sampling frequency
because the response of an external PLL to the frequency change is slow. The AK4127 operates normally up to 23%/sec
speed but outputs incorrect data at the speed of the frequency change over 23%/sec.
AK4127 Jitter Tolerance
0.00
0.01
0.10
1.00
10.00
1 10 100 1000 10000
Jitter Frequency [Hz]
Amplitude [UIpp]
(3)
(2)
(1)
[AK4127]
MS0593-E-02 2010/05
- 26 -
3. Digital Filter Response Example
Table 8 shows the examples of digital filter response performed by the AK4127.
Ratio FSO/FSI [kHz] Passband [kHz] Stopband [kHz]
Stopband
Attenuation [dB]
Gain [dB]
4.000 192/48.0 22.000 26.000
−121.2 −0.01@ 20k
1.000 48.0/48.0 22.000 26.000
−121.2 −0.01@ 20k
0.919 44.1/48.0 20.000 24.100
−121.4 −0.01@ 20k
0.725 32.0/44.1 14.088 17.487
−115.3 −0.01@ 14.5k
0.667 32.0/48.0 13.688 17.488
−116.9 −0.19@ 14.5k
0.544 48.0/88.2 19.250 26.232
−114.6 −0.03@ 20k
0.500 48.0/96.0 20.900 27.000
−100.2 −0.01@ 20k
0.500 44.1/88.2 19.202 24.806
−100.2 −0.08@ 20k
0.459 44.1/96.0 18.700 25.000
−103.3 −0.23@ 20k
0.363 32.0/88.2 12.863 18.665
−102.0 −0.75@ 14.5k
0.333 32.0/96.0 12.500 18.900
−103.6 −1.07@ 14.5k
0.250 48.0/192.0 17.600 30.200
−104.0 −0.18@ 20k
0.250 44.1/176.4 16.170 27.746
−104.0 −1.34@ 20k
0.230 44.1/192.0 15.860 28.240
−103.3 −1.40@ 20k
0.167 32.0/192.0 11.200 19.600
−73.2 −2.97@ 14.5k
0.181 32.0/176.4 10.278 17.987
−73.2 −7.88@ 14.5k
0.167 8/48.0 2.800 4.900
−73.2 −2.97@ 3.625k
0.181 8/44.1 2.5695 4.4968
−73.2 −7.88@ 3.625k
Table 8. Digital Filter Example
[AK4127]
MS0593-E-02 2010/05
- 27 -
PACKAGE
Detail A
NOTE: Dimension "*" does not include mold flash.
0.22
±
0.1
0.65
*9.7
±
0.1
1.5MAX
A
1
15
16
30
30pin VSOP (Unit: mm)
5.6
±
0.1
7.6
±
0.2
0.45
±
0.2
-0.05
+0.10
0.3
0.15
0.12
M
0.08
1.2
±
0.10
0.10
+0.10
-0.05
■ Material & Lead finish
Package molding compound: Epoxy
Lead frame material: Cu
Lead frame surface treatment: Solder (Pb free) plate
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29

AK4127VF

Mfr. #:
Buy AK4127VF
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Description:
IC SRC 2 CHAN 192KHZ 30VSOP
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New from this manufacturer.
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