ASAHI KASEI

[AK4565]

MS0132-E-01

2003/05

- 7 -

FILTER CHARCTERISTICS

(Ta=25

°C; VA, VD=2.3 ∼ 3.6V; VT=1.5∼ 3.6V; fs=48kHz; De-emphasis = OFF)

Parameter

Symbol

min

typ

max

Units

ADC Digital Filter (Decimation LPF):

Passband (Note 12)

±0.1dB

-1.0dB

-3.0dB

PB

0

-

-

21.8

23.0

18.9

-

-

kHz

kHz

kHz

Stopband (Note 12)

SB

29.4

kHz

Passband Ripple

PR

±0.1

dB

Stopband Attenuation

SA

65

dB

Group Delay (Note 13)

GD

-

17.0

-

1/fs

Group Delay Distortion

∆GD

0

µs

ADC Digital Filter (HPF):

Frequency Response (Note 12)

-3.0dB

-0.56dB

-0.15dB

FR

-

-

-

3.7

10

20

-

-

-

Hz

Hz

Hz

DAC Digital Filter:

Passband (Note 12)

±0.1dB

-6.0dB

PB

0

-

24.0

21.7

-

kHz

kHz

Stopband (Note 12)

SB

26.2

kHz

Passband Ripple

PR

±0.06

dB

Stopband Attenuation

SA

43

dB

Group Delay (Note 13)

GD

-

14.8

-

1/fs

Group Delay Distortion

∆GD

0

µs

DAC Digital Filter + Analog Filter:

Frequency Response: 0

∼ 20.0kHz

FR

±0.5

dB

Note 12. The passband and stopband frequencies scale with fs.

For example, ADC: PB=0.454 x fs(@-1.0dB), DAC: PB=0.454 x fs(@-0.1dB).

Note 13. The calculated delay time caused by digital filtering. This time is from the input of an analog signal to setting the

20bit data of both channels to the output register of the ADC and includes the group delay of the HPF.

For DAC, this time is from setting the 20bit data of both channels on input register to the output of analog signal.