AK2347A 查看數據表（PDF） - Asahi Kasei Microdevices

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AK2347A

Two-way Radio Audio & Sub-Audio Processor

Asahi Kasei Microdevices 

[AK2347A]

Parameter

VR3

Attenuation error

VR4

Attenuation error

VR4 ATT error

(VR45…40=0,0,0,0,0,

0)

Condition

RXIN0 to RXOUT

-4.0dB to +3.5dB, 0.5dB/step

RXIN0 to RXOUT

-4.5 to +4.5dB, 1.5dB/step

RXIN0 to RXOUT

Relative value when –18/0dB

is set

Min.

-0.5

-0.25

-20

Typ.

-18

Max.

+0.5

+0.25

Units

dB

Remarks

dB

-16

dB

3) Audio Filter Characteristics

3.1) Emphasis: on, Compandor: off, Scrambler: off

Parameter

Condition

Min.

Typ.

Max.

Units Remarks

TX overall

characteristics

RX overall

characteristics

TXINO to MOD

Relative value

to gain at 1kHz

RXINO to RXAF

Relative value

to gain at 1kHz

250Hz

-57

-40

dB

300Hz -12.5

2.5kHz +6.0

3.0kHz +4.5

6.0kHz

-23

-9.5

+9.0

+8.5

-18

SPL=0

dB fc=2.55

K

300Hz -12.5

-9.5

2.5kHz +6.0

3.0kHz +7.0

+9.0

+10.5

dB

SPL=1

fc=3.0K

6.0kHz

-17

-12

250Hz

-38

-26

300Hz +8.5

3.0kHz -11.5

+11.5

-8.5

dB

6.0kHz

-52

-40

3.2) Emphasis: off, Compandor: off, Scrambler: off

(Design target values)

Parameter

Condition

Min.

Typ.

Max.

Units Remarks

TX overall

characteristics

TXINO to MOD

250Hz

-50

-38

dB

300Hz to 2.0kHz -1.0

2.5kHz -1.5

Relative value

3.0kHz -4.0

to gain at 1kHz

6.0kHz

-32

+1.0

+1.0

-1.0

-28

SPL=0

dB fc=2.55

K

300Hz to 2.5kHz -1.0

3.0kHz -1.5

6.0kHz

-26

+1.0

+1.0

-22

dB

SPL=1

fc=3.0K

RX overall

characteristics

RXINO to RXAF

250Hz

-49

-38

300Hz -1.5

Relative value 350Hz to 3.0kHz -1.0

+1.0

+1.0

dB

to gain at 1kHz

6.0kHz

-38

-28

MS0946-E-00

- 10 -

2008/03

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