AK2347A データシートの表示（PDF） - Asahi Kasei Microdevices

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AK2347A

Two-way Radio Audio & Sub-Audio Processor

Asahi Kasei Microdevices 

[AK2347A]

Block Diagram

TXINO 24

TC

EM

1

TXIN

RXINO 20

-

VR1 Com-

+

(HPF) pressor

TXA1

-6 to +4.5/1.5dB

Pre-

Emphasis

TXRX

21

RXIN

-

+

RXA1

19

FILTERO

VR3

RXLPF

-4 to +3.5/0.5dB

FILSW2,1

fc = 300Hz

TX/RX

_HPF

2

3

-

+

TXA2

Scrambler/

Descrambler

HPF

TXRX

PCONT

4

TXSW2,1

Adder

LMT

Limiter

VR2

Splatter

5

SMF

De-

Emphasis

RXSW

EM

-9.6 to +3.0

/0.2dB

Expan-

der

fc = 2.55kHz

/3.0kHz

VR4

18

SMF

-18,-4.5 to +4.5

TC

/0.25dB

MOD

RXOUT

3.6864MHz

/ 3.579545MHz

DINO

DIN

17

16 -

+

DTA1

Sub-Audio

Programmable

LPF

SASW

VR5

-6 to +6/ 0.5dB

SASW

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

AGND

14 15

7 89

10

13

6

22

23

+

+

+

11

OSC 12

XIN

XOUT

MS0946-E-00

-3-

2008/03

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