AK2347 View Datasheet(PDF) - Asahi Kasei Microdevices

Part Name

Description

Manufacturer

AK2347

Audio sub audio LSI for radio

Asahi Kasei Microdevices 

ASAHI KASEI

ブロック図

[AK2347]

TXINO 3

TC

EM

4

TXIN

RXINO 23

-

+

TXA1

VR1

(HPF)

Com-

pressor

-6 to +4.5/1.5dB

Pre-

Emphasis

TXRX

24

RXIN

-

+

RXA1

22

FILTERO

VR3

RXLPF

-4 to +3.5/0.5dB

FILSW2,1

fc = 300Hz

TX/RX

_HPF

5

6

-

+

TXA2

Scrambler/

Descrambler

HPF

TXRX

PCONT

7

TXSW2,1

Adder

LMT

Limiter

VR2

Splatter

8

SMF

De-

Emphasis

RXSW

EM

-9.6 to +3.0

/0.2dB

Expan-

der

fc = 2.55kHz

/3.0kHz

VR4

21

SMF

-18,-4.5 to +4.5

TC

/0.25dB

MOD

RXOUT

3.6864MHz

/ 3.579545MHz

DINO

DIN

20

19

-

+

DTA1

Sub-Audio

Programmable

LPF

SASW

VR5

-6 to +6/ 0.5dB

SASW

17 18

Power ON

Power ON Power ON Power ON

at Mode 1,2,3,4 at Mode 2,4 at Mode 3,4 at Mode 2,3,4

Control

Register

10 11 12 13

16

9

+

AGND

1

2

+

+

14

OSC 15

XIN

XOUT

MS0375-J-00

2005/01

-3-

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