ASAHI KASEI

[AK4562]

MS0031-E-00

2000/05

- 8 -

FILTER CHARACTERISTICS

(Ta=-20

∼ 70°C; VA, VD=2.2 ∼ 3.0V, VT=1.8 ∼ 3.0; fs=44.1kHz; 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

20.0

21.1

17.4

kHz

kHz

kHz

Stopband

(Note 12)

SB

27.0

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

0us

ADC Digital Filter (HPF):

Frequency Response (Note 12)

-3dB

-0.5dB

-0.1dB

FR

3.4

10

22

Hz

Hz

Hz

DAC Digital Filter:

Passband

(Note 12)

±0.1dB

-6.0dB

PB

0

22.05

20.0

kHz

kHz

Stopband

(Note 12)

SB

24.1

kHz

Passband Ripple

PR

±0.06

dB

Stopband Attenuation

SA

43

dB

Group Delay

(Note 13)

GD

14.7

1/fs

Group Delay Distortion

∆GD

0us

DAC Digital Filter + Analog Filter

Frequency Response

0

∼ 20.0kHz

FR

±0.5

dB

Note : 12. The passband and stopband frequencies scale with fs (sampling frequency).

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

Note : 13. The calculating delay time which occurred by digital filtering. This time is from the input of analog signal to

setting the 20bit data of both channels to the output register for ADC and include group delay of HPF. For

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

DC CHARACTERISTICS

(Ta=-20

∼ 70°C; VA, VD=2.2 ∼ 3.0V, VT=1.8 ∼ 3.0V)

Parameter

Symbol

min

Typ

max

Units

High-Level Input Voltage

Low-Level Input Voltage

VIH

VIL

75

%VT

-

-

-

-

25

%VT

V

V

High-Level Output Voltage

(Iout=-400uA)

Low-Level Output Voltage

(Iout=400uA)

VOH

VOL

VT-0.4

-

--

0.4

V

V

Input Leakage Current

Iin

-

-

± 10

uA