AK2307LV データシートの表示（PDF） - Asahi Kasei Microdevices

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AK2307LV

SPEECH CODEC for Digital Key telephone (5.0V/3.3V)

Asahi Kasei Microdevices 

ASAHI KASEI

BLOCK DIAGRAM

[AK2307/LV]

Handset Mic

I/F HANDT4

HANDT1

HANDT2

HANDT3

upto +25dB

Amp1

+14dB SW1

+14dB SW2

SW3

+0dB

Amp3

VOL1

16 steps

by 1dB

+7 to -8dB

A/D

AGC

(Back ground

Noise ATT)

TX Digital

Attenuator

8 steps

by 3dB

0 to -21dB

Linear

A/u

External Mic

I/F MIC3

MIC1

MIC2

Amp2

DAOUT

RAIN

Handset Receiver

output

HANDR

VOL2

24 steps

by 1dB

0 to -23dB

0dB/+3dB SW4

SW5

150ohm Driver

VOL3

24 steps

by 1dB

0 to -23dB

-1

Headset Receiver

0dB/+3dB

SW6

output

HEADO

Amp5

SW7

-1

150ohm Driver

0dB/+3dB

Speaker output

SPO

Amp10

10K ohm Driver

SW 8

SW9

SW 10

VOL5

16 steps

by 2dB

0 to -30dB

16 Steps Side Tone

by 3dB Digital ATT

-12 to -57dB

PCM CODEC

RX Digital

Volume

8 steps

D/A

+

PAD

0/-9dB

by 3dB

+6 to -21dB

Linear

A/u

PCM

Interface

VOL4

16 steps

by 3dB

0 to -45dB

Tone Gen H

(DTMF-H)

+

L_ATT Tone Gen L

-2.5dB (DMTF-L)

PLL

Clock generator

CPU Interface

Voltage Reference

16bit Linear

or

A/u-law

DX

DR

FS

BCLK

PLLCAP

CSN

SCLK

DATA

VREF

TAGND

RAGND

MS0190-E-05

2

2005/12

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