AK7735EQ Datasheet, PDF (23/142 Pages) Asahi Kasei Microsystems – Dual DSP with 4chADC + 4chDAC + 4chSRC

[AK7735]
4. Short Delay Slow Roll-Off Filter (ADSD bit = “1”, ADSL bit = “1”)
fs=48kHz
Parameter
Symbol
Min.
Typ.
SHORT DELAY SLOW ROLL-OFF
Passband * 25
0dB ~ -0.074dB
-3.0dB
PB
PB
0
19.2
Stopband * 25
SB
36.5
Stopband Attenuation
SA
85.0
Group Delay Distortion : 0Hz~20kHz
GD
Group Delay * 26
GD
6
ADC Digital Filter(HPF)
Frequency Response -3.0dB
FR
0.9
Max.
Unit
12.5
kHz
kHz
kHz
dB
2.6
1/fs
1/fs
Hz
fs=96kHz
Parameter
Symbol
Min.
Typ.
SHORT DELAY SLOW ROLL-OFF
Passband * 25
0dB ~ -0.074dB
-3.0dB
PB
PB
0
38.5
Stopband * 25
SB
73.0
Stopband Attenuation
SA
85.0
Group Delay Distortion : 0Hz~40kHz
GD
Group Delay * 26
GD
6
ADC Digital Filter(HPF)
Frequency Response -3.0dB
FR
1.9
Max.
Unit
25
kHz
kHz
kHz
dB
2.6
1/fs
1/fs
Hz
fs=192kHz
Parameter
Symbol
Min.
Typ.
Max.
Unit
SHORT DELAY SLOW ROLL-OFF
Passband * 25
0dB ~ -0.1dB
-3.0dB
PB
PB
0
31.1
kHz
63.2
kHz
Stopband * 25
SB
145.9
kHz
Stopband Attenuation
SA
85.0
dB
Group Delay Distortion : 0Hz~40kHz
GD
0.5
1/fs
Group Delay * 26
GD
7
1/fs
ADC Digital Filter(HPF)
Frequency Response -3.0dB
FR
3.8
Hz
Notes
* 25. The passband and stopband frequencies are proportional to fs (sampling rate). High-pass filter
characteristics are not included. A reference value of each gain amplitude is the maximum value of
frequency response.
* 26. Delay time caused by the digital filter calculation. This time is measured from an analog signal input
until 24-bit data of both channels are set into the output register. It includes group delay by HPF.
016014707-E-00
- 23 -
2016/12