AK4523VF Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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AK4523VF

20Bit Stereo ΔΣ ADC & DAC

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4523]

FILTER CHARACTERISTICS

(Ta=25°C; VA=4.5 ~ 5.5V, VD=3.0 ~ 5.5V; DEM0=”1”, DEM1=”0”)

Parameter

Symbol

min

typ

ADC Digital Filter (Decimation LPF):

Passband

(Note 11) -0.005dB

PB

0

-0.02dB

0

-0.06dB

0

-6.0dB

0

Stopband

SB

24.34

Passband Ripple

PR

Stopband Attenuation

SA

80

Group Delay

(Note 12)

GD

29.3

Group Delay Distortion

DGD

0

ADC Digital Filter (HPF):

Frequency Response

(Note 5) -3dB

FR

0.9

-0.5dB

2.7

-0.1dB

6.0

DAC Digital Filter:

Passband

(Note 11) -0.06dB

PB

0

-6.0dB

0

Stopband

SB

24.1

Passband Ripple

PR

Stopband Attenuation

SA

43

Group Delay

(Note 12)

GD

14.7

DAC Digital Filter + Analog Filter:

Frequency Response: 0 ~ 20.0kHz

FR

-

±0.2

max

19.76

20.02

20.20

22.05

±0.005

20.0

22.05

±0.06

-

Units

kHz

kHz

kHz

kHz

kHz

dB

dB

1/fs

µs

Hz

Hz

Hz

kHz

kHz

kHz

dB

dB

1/fs

dB

Note:11. The passband and stopband frequencies scale with fs.

For example, 20.02kHz at -0.02dB is 0.454 x fs. The reference frequency of these responses is 1kHz.

12. 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.

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

signal.

M0021-E-03

-6-

1999/12

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