ML7012-04 데이터 시트보기 (PDF) - Oki Electric Industry

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ML7012-04

2400 bps Single Chip Full Duplex Data Modem with Protocol

Oki Electric Industry 

1Semiconductor

FEDL 7012-04-01

ML7012-04

APPLICATION CIRCUITS

Analog Interface

–

+

ML7012

AOUT

RCI

RCAO

–

+

TXAI

R1

C1

R3

C2

R2

R4

–

+ RA

TXAN

RB ( = RA)

–

+

–

+

TXAP

AIN

GSR

SG

SG Gen.

R5

C3

0.022 µF

R6

600 Ω

600 Ω: 600 Ω

LINE

R7

R8

C4

1 µF

• The 2nd order LPF should be

built to make fc approximately 5

kHz using the built-in amplifier,

R1 to R3, and C1 and C2.

Numeric examples:

R1 = R2 = R3 = 68 k Ω

C1 = 1000 pF, C2 = 220 pF

• When VDD ≥ 3 V, R5/R4 ≤ 2.

• When VDD < 3 V, R5/R4 ≤ 1.6.

19/22

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