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AK4562

Low Power 20bit ∆Σ CODEC with PGA

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4562]

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

ADC Digital Filter (Decimation LPF):

Passband

(Note 12) ±0.1dB

PB

-1.0dB

-3.0dB

0

20.0

21.1

Stopband

(Note 12)

SB

27.0

Passband Ripple

PR

Stopband Attenuation

SA

65

Group Delay

(Note 13)

GD

17.0

Group Delay Distortion

∆GD

0

ADC Digital Filter (HPF):

Frequency Response (Note 12) -3dB

FR

3.4

-0.5dB

10

-0.1dB

22

DAC Digital Filter:

Passband

(Note 12) ±0.1dB

PB

-6.0dB

0

22.05

Stopband

(Note 12)

SB

24.1

Passband Ripple

PR

Stopband Attenuation

SA

43

Group Delay

(Note 13)

GD

14.7

Group Delay Distortion

∆GD

0

DAC Digital Filter + Analog Filter

Frequency Response

0 ∼ 20.0kHz

FR

±0.5

max

17.4

±0.1

20.0

±0.06

Units

kHz

kHz

kHz

kHz

dB

dB

1/fs

us

Hz

Hz

Hz

kHz

kHz

kHz

dB

dB

1/fs

us

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

High-Level Input Voltage

Low-Level Input Voltage

VIH

75%VT

-

VIL

-

-

High-Level Output Voltage (Iout=-400uA)

VOH

VT-0.4

-

Low-Level Output Voltage (Iout=400uA)

VOL

-

Input Leakage Current

Iin

-

-

max

-

25%VT

-

0.4

± 10

Units

V

V

V

V

uA

MS0031-E-00

-8-

2000/05

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