AK7756 Datasheet, PDF (13/27 Pages) Asahi Kasei Microsystems – DSP with Mono CODEC + Mic/Lineout Amp

[AK7756]
DIGITAL FILTER CHARACTERISTICS
■ ADC Block
1. fs=8kHz
(Ta= Tmin~Tmax, AVDD= DVDD=3.0~3.6V, DVDD18=1.7~1.9V, VSS1=VSS2=0V; fs=8 kHz)
Parameter
Symbol
min
typ
max
Unit
Passband (±0.1dB) (Note 19, Note 20)
PB
0
3.15
kHz
(-0.02dB)
3.63
kHz
(-3.0dB)
3.83
kHz
Stopband
SB
4.66
kHz
Passband Ripple
(Note 20)
PR
±0.1
dB
Stopband Attenuation (Note 21, Note 22)
SA
68
dB
Group Delay Distortion
ΔGD
0
μs
Group Deley
(Ts=1/fs)
GD
16
Ts
Note 19. The characteristic of the high pass filter is not included.
Note 20. The passband is from DC to 3.15kHz
Note 21. The stopband is 4.66kHz to 507.34kHz.
Note 22. The analog modulator samples the input signal at 512kHz.
2. fs=16kHz
(Ta= Tmin~Tmax, AVDD= DVDD=3.0~3.6V, DVDD18=1.7~1.9V, VSS1=VSS2=0V; fs=16 kHz)
Parameter
Symbol
min
typ
max
Unit
Passband (±0.1dB) (Note 23, Note 24)
PB
0
6.3
kHz
(-0.02dB)
7.26
kHz
(-3.0dB)
7.66
kHz
Stopband
SB
9.32
kHz
Passband Ripple
(Note 24)
PR
±0.1
dB
Stopband Attenuation (Note 25,Note 26)
SA
68
dB
Group Delay Distortion
ΔGD
0
μs
Group Deley
(Ts=1/fs)
GD
16
Ts
Note 23. The characteristic of the high pass filter is not included.
Note 24. The passband is from DC to 6.3kHz
Note 25. The stopband is 9.32kHz to 1014.68kHz.
Note 26. The analog modulator samples the input signal at 1024kHz.
MS1218-E-00-PB
13
2010/08