AK7750 Datasheet, PDF (17/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
4-2) DAC section
a) DAF bit = ‘0’ (CONT6 D6)
(Ta=25°C; AVDD,DVDD =3.0~3.6V; fs=48kHz)
Parameter
Symbol
min
Digital filter
Pass band ±0.08dB
PB
0
(-0.28dB) (Note 1)
-
(-6.0dB)
-
Stop band
(Note 1)
SB
26.5
Pass band ripple
PR
Stop band attenuation
SA
47
Group delay (Ts=1/fs) (Note 2)
GD
-
Digital filter+SCF
Amplitude characteristics
0 to 20.0kHz
typ
max
Units
21.2
kHz
21.7
-
kHz
24.0
-
kHz
kHz
±0.04
dB
dB
15
Ts
±0.5
dB
Note:
1. The pass band and stop band frequencies are proportional to "fs" (system sampling rate), and
represents PB=0.4535fs(@-0.06dB) and SB=0.546fs, respectively.
2. The digital filter’s delay is calculated as the time from setting 24 Bit data into the input register until an
analog signal is output.
b) DAF bit = ‘1’ (CONT6 D6)
(Ta=25°C; AVDD,DVDD =3.0~3.6V; fs=48kHz)
Parameter
Symbol
min
Digital filter
Pass band ±0.02dB
PB
0
(-0.48dB) (Note 1)
-
(-6.0dB)
-
Stop band
(Note 1)
SB
27.4
Pass band ripple
PR
Stop band attenuation
SA
59
Group delay (Ts=1/fs) (Note 2)
GD
-
Digital filter+SCF
Amplitude characteristics
0 to 20.0kHz
typ
max
Units
20.6
kHz
21.7
-
kHz
24.0
-
kHz
kHz
±0.01
dB
dB
15
Ts
±0.5
dB
Note:
1. The pass band and stop band frequencies are proportional to "fs" (system sampling rate), and
represents PB=0.4292fs(@-0.06dB) and SB=0.571fs, respectively.
2. The digital filter’s delay is calculated as the time from setting 24 Bit data into the input register until an
analog signal is output.
[MS0296-E-00]
17
2005/03