ML7041 datasheet(6/28 Pages) OKI

Part #	ML7041

Description	single-channel full duplex CODEC LSI device which performs mutual transcoding between the analog voice band signals ranging from 300 to 3400 Hz and th

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FEDL7041-04

OKI Semiconductor

ML7041

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Figure 1 Analog Interface

A/D

20 k

Ω

20 k

Ω

20 k

Ω

MIC1I

MIC1O

MIC2I

MIC2O

MIC3–

MIC3+

MIC3O

R1

R2

C

R3

C

SG

VREF

R4

R5

R6

Transmit Gain

: VMIC1O/Vi = (R2/R1)

: VMIC2O/Vi = (R4/R3)

: VMIC3O/Vi = (R6/R5)

Input select

:CR1-B7, B6 “00” -> MIC1

:CR1-B7, B6 “01” -> MIC2

:CR1-B7, B6 “10” -> MIC3

:CR1-B7, B6 “11” -> no-input

Receive Gain

:Vspo/VEXTO = (R8/R7)

× 2

Output select

:CR1-B5, B4 “00” -> EXTO

:CR1-B5, B4 “01” -> EAR1O

:CR1-B5, B4 “10” -> EAR2O

:CR1-B5, B4 “11” -> no-output

Vi

EAR1O

EAR2O

SPO–

SPO+

EXTO

D/A

EXTI

R7

R8

C

VEXTO

VSPO

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