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For Audio Equipment

MN6474A

D/A Converter for Digital Audio Equipment

Overview

The MN6474A is a CMOS digital-to-analog converter

with a built-in 16-bit digital filter for pulse code

modulation (PCM) digital audio equipment.

It uses noise shaping technology to convert a digital

signal into a PWM signal.

It contains a 4-fold oversampling digital filter that

permits simplification of the low pass filter after the D/A

converter, thus greatly reducing the power consumption

of the entire D/A conversion system.

The chip provides both regular and inverted phase

outputs for both channels.

The chip contributes to cost and size reductions for CD

players and other digital audio equipment.

Pin Assignment

LRPOL

LRCLK

BCLK

SRDATA

DV

SS3

DV

DD

384FS

PD

MDATA

MCLK

33

34

35

36

37

38

39

40

41

42

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

192FS

ZFLGB

NSUB

DV

SS2

DV

DD2

N.C.

X1

X2

DV

SS1

DV

DD1

AV

DD1

Built-in 4-fold oversampling digital filter

(ripple of only 鹵0.0072 dB within the supported

band and attenuation of 62.7 dB within the cutoff

band)

Internal resolution of 18 bits

Two's complement input (I

2

S input code also supported)

Built-in overflow limiter

No zero cross distortion

Sample-and-hold circuit is unnecessary

Output pin for detecting zero input

Single 5V power supply

Applications

CD players and other digital audio equipment

MLD

RSTB

IE

TP1

TP2

TEST1

TEST2

N.C.

N.C.

AV

DD4

Features

1

2

3

4

5

6

7

8

9

10

OUTR(鈥?

AV

SS1

AV

SS2

OUTR(+)

AV

DD2

N.C.

AV

DD3

OUTL(+)

AV

SS3

AV

SS4

OUTL(鈥?

(TOP VIEW)

QFP042-P-1414A

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