AK7770EQ Datasheet, PDF (14/22 Pages) Asahi Kasei Microsystems – Audio DSP with Multi-Channel Audio CODEC

[AK7770]
■ DAC1-3
(Ta=-10°C ~70°C; AVDD=DVDD=3.0~3.6V; DVDD18=1.7~1.9V; VSS1 = VSS2 = VSS3=0V; fs=48kHz;
DEM=OFF)
Parameter
Symbol
min
typ
max
Units
Passband (±0.05dB) (Note 25)
PB
0
21.7
kHz
(-6.0dB)
24
kHz
Stopband
(Note 25)
SB
26.2
kHz
Passband ripple
PR
±0.01
dB
Stopband Attenuation
SA
64
dB
Group delay (Ts=1/fs) (Note 26)
GD
24
Ts
Digital filter + analog filter
Amplitude characteristic
±0.5
dB
20Hz~20.0kHz
Note 25. The pass band and stop band frequencies are proportional to “fs” (system sampling rate), and represents
PB=0.4535 * fs (@ -0.05dB), and SB=0.5465 * fs, respectively.
Note 26. The digital filter’s delay is calculated as the time from setting data into the input register until an analog signal is
output.
■ SRC1/2
(Ta=-10°C ~70°C; AVDD=HVDD=DVDD=3.0~3.6V; DVDD18=1.7~1.9V; VSS1 = VSS2 = VSS3=0V)
Parameter
Symbol
min
typ
max
Units
Passband -0.01dB (0.980≤FSO/FSI≤1.500)
PB
0
0.4583FSI kHz
Stop Band
(0.980≤FSO/FSI≤1.500)
SB
0.5417FSI
kHz
Passband ripple
PR
± 0.01
dB
Stop band attenuation
SA
102.2
dB
Group Delay (Ts=1/fs)
(Note 27)
GD
56
Ts
Note 27. SRC delay time is calculated from the start of SRCLRCK just after data input to the start of LRCLKO just after
data output, when there is no phase difference between SRCLRCK and LRCLKO.
MS0699-E-01-PB
- 14 -
2008/06