AK7735EQ datasheet(23/142 Pages) AKM

Il numero della parte	AK7735EQ

Spiegazioni elettronici	Dual DSP with 4chADC 4chDAC 4chSRC

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Produttore elettronici	AKM [Asahi Kasei Microsystems]

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[AK7735]

016014707-E-00

2016/12

- 23 -

4. Short Delay Slow Roll-Off Filter (ADSD bit =

“1”, ADSL bit = “1”)

fs=48kHz

Parameter

Symbol

Min.

Typ.

Max.

Unit

SHORT DELAY SLOW ROLL-OFF

Passband * 25

0dB ~ -0.074dB

PB

0

12.5

kHz

-3.0dB

PB

19.2

kHz

Stopband * 25

SB

36.5

kHz

Stopband Attenuation

SA

85.0

dB

Group Delay Distortion : 0Hz~20kHz

GD

2.6

1/fs

Group Delay * 26

GD

6

1/fs

ADC Digital Filter(HPF)

Frequency Response

-3.0dB

FR

0.9

Hz

fs=96kHz

Parameter

Symbol

Min.

Typ.

Max.

Unit

SHORT DELAY SLOW ROLL-OFF

Passband * 25

0dB ~ -0.074dB

PB

0

25

kHz

-3.0dB

PB

38.5

kHz

Stopband * 25

SB

73.0

kHz

Stopband Attenuation

SA

85.0

dB

Group Delay Distortion : 0Hz~40kHz

GD

2.6

1/fs

Group Delay * 26

GD

6

1/fs

ADC Digital Filter(HPF)

Frequency Response

-3.0dB

FR

1.9

Hz

fs=192kHz

Parameter

Symbol

Min.

Typ.

Max.

Unit

SHORT DELAY SLOW ROLL-OFF

Passband * 25

0dB ~ -0.1dB

PB

0

31.1

kHz

-3.0dB

PB

63.2

kHz

Stopband * 25

SB

145.9

kHz

Stopband Attenuation

SA

85.0

dB

Group Delay Distortion : 0Hz~40kHz

GD

0.5

1/fs

Group Delay * 26

GD

7

1/fs

ADC Digital Filter(HPF)

Frequency Response

-3.0dB

FR

3.8

Hz

Notes

* 25. The passband and stopband frequencies are proportional to fs (sampling rate). High-pass filter

characteristics are not included. A reference value of each gain amplitude is the maximum value of

frequency response.

* 26. Delay time caused by the digital filter calculation. This time is measured from an analog signal input

until 24-bit data of both channels are set into the output register. It includes group delay by HPF.

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