MSM7542 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM7542

Single Rail CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7541/7542

APPLICATION CIRCUIT

Analog interface

Analog input

Analog output

0V

+3.3 V

0.1 mF

51 kW

MSM7541/7542

AIN– PCMOUT

XSYNC

GSX

AIN+

RSYNC

SG

BCLOCK

PCMIN

AOUT–

PDN

PWI

TMC

VFRO

51 kW

SGC

0.1 mF

AG

DG

10 mF +

0 to 10 W

1 mF

VDD

Digital interface

+3.3 V

PCM signal output

8 kHz SYNC signal input

BCLOCK input

PCM data input

Power Down control input

Analog loop-back

control input

FREQUENCY CHARACTERISTICS ADJUSTMENT CIRCUIT

Microphone amp

R1

M

C1

C2

R2

Receiver impedance to

1.2 kW + 55 nF

R4

C4

R3 C3

AIN–

GSX

AIN+

SG

AOUT+

AOUT–

PWI

VFRO

Transmit frequency

characteristic

Adjustment determined with

C1, C2, R1, R2.

Receive frequency

characteristic

Adjustment determined with

C3, C4, R3, R4.

16/20

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