ASAHI KASEI

[AK5352]

0155-E-00

1997/1

- 8 -

DIGITAL FILTER CHARACTERISTICS

(Ta=25

Low Pass Filter characteristics

Symbol

min

typ

max

Units

Passband

-0.005dB

(Note 12 )

-0.02dB

-0.06dB

PB

0

21.5

21.768

22.0

kHz

Stopband

(Note 13 )

SB

26.5

kHz

Passband Ripple

(Note 14 )

PR

±0.005

dB

Stopband Attenuation (Note 13 ,Note 15 )

SR

80

dB

Group Delay Distortion

0us

Group Delay

(Note 16 )

GD

29.3

1/fs

High Pass Filter characteristics

Frequency Response -3dB (Note 12 )

-0.5dB

-0.1dB

FR

1.0

2.9

6.5

Hz

Hz

Hz

Note 12 : These frequencies scale with the sampling frequency(fs).

Note 13 : Stopband is 26.5kHz to 3.0455MHz at fs=48kHz.

Note 14 : Passband is DC to 21.5kHz at fs=48kHz.

Note 15 : The analog modulator samples the input at 3.072MHz for a system sampling rate of

fs=48kHz. These is no rejection of input signals at those bandwidths which are multiples of

the sampling frequency (n x 3.072MHz ±22kHz ;n=0,1,2,3… ).

Note 16 : The calculation delay time occurred by digital filtering. This is the time from the input of

analog signal to setting the 20bit data of both channels to the output registers. GD=29.3/fs.

ELECTRICAL CHARACTERISTICS

(Ta=25

Parameter

Symbol

min

typ

max

Units

High-Level Input voltage

Low-Level Input voltage

70%VD

-

-

-

-

30%VD

V

V

High-Level Output voltage

Iout=-20uA

Low-Level Output voltage

Iout=20uA

VD-0.1

-

-

-

-

0.1

V

V

Input Leakage Current

(Note 17 )

Iin

-

-

±10

uA

Note 17 : Except for pull-down and pull-up pins. TST1, TST2, TST3, TST4, SMODE2 pins have internal

pull-down device, HPFE pin has internal pull-up device. (TYP.50k

Ω)