AK4458 Datasheet, PDF (13/84 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 8ch Premium DAC

[AK4458]
■ Sharp Roll-Off Filter Characteristics
Sharp Roll-Off Filter Characteristics (fs= 44.1kHz)
(Ta=-40  105C; AVDD=3.0  5.5V, TVDD=1.7  3.6V; Normal Speed Mode; DEM=OFF;
SLOW bit = “0”, SD bit=“0”)
Parameter
Symbol Min.
Typ.
Max.
Unit
Digital Filter
Pass band
(Note 16) ^0.05dB
PB
0
20.0
kHz
3.0dB
PB
21.5
kHz
Pass band Ripple
(Note 17)
PR
-0.0032
0.0032
dB
Stop band
(Note 16)
SB
24.1
kHz
Stop band Attenuation
(Note 19)
SA
80
dB
Group Delay
(Note 18)
GD
-
26.8
-
1/fs
Frequency Response (Note 19) 0.07dB
-
0
20.0
kHz
Digital Filter + SCF
(Note 19)
Frequency Response: 0  20.0kHz
-0.2
0.1
dB
Sharp Roll-Off Filter Characteristics (fs= 96kHz)
(Ta=-40  105C; AVDD=3.0  5.5V, TVDD=1.7  3.6V; Double Speed Mode; DEM=OFF; SLOW bit = “0”,
SD bit=“0”)
Parameter
Symbol Min.
Typ.
Max.
Unit
Digital Filter
Pass band
(Note 16)
0.05dB
3.0dB
PB
PB
0
43.5
kHz
46.8
kHz
Pass band Ripple
(Note 17)
PR
-0.0032
0.0032
dB
Stop band
(Note 16)
SB
52.5
0
43.5
Stop band Attenuation
(Note 19)
SA
80
dB
Group Delay
(Note 18)
GD
-
26.8
-
1/fs
Frequency Response (Note 19) 0.07dB
-
0
43.5
kHz
Digital Filter + SCF
(Note 19)
Frequency Response: 0  40.0kHz
-0.3
0.1
dB
Sharp Roll-Off Filter Characteristics (fs= 192kHz)
(Ta=-40  105C; AVDD=3.0  5.5V, TVDD=1.7  3.6V; Quad Speed Mode; DEM=OFF; SLOW bit = “0”,
SD bit=“0”)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Digital Filter
Pass band
(Note 16)
0.05dB
3.0dB
PB
PB
0
87.0
kHz
93.6
kHz
Pass band Ripple
(Note 17)
PR
-0.0032
0.0032
dB
Stop band
(Note 16)
SB
105
kHz
Stop band Attenuation
(Note 19)
SA
80
dB
Group Delay
(Note 18)
GD
-
26.8
-
1/fs
Frequency Response (Note 19) 0.07dB
-
0
87.0
kHz
Digital Filter + SCF
(Note 19)
Frequency Response: 0  80.0kHz
-1
0.1
dB
Note 16. The pass band and stop band frequencies scale with fs. For example, PB=0.4535×fs, SB=0.546×fs.
Note 17. It is the pass band gain amplitude of the double over sampling filter at the first step of the Interpolator.
Note 18. The calculating delay time which occurred by digital filtering. This time is from setting the
16/20/24/32bit data of both channels to input register to the output of analog signal.
Note 19. The output level is assumed as 0dB when inputting a 1kHz 0dB sine wave.
*Digital filter characteristics are based on simulation results.
014011794-E-01
- 13 -
2015/08