ASAHI KASEI

[AK4520A]

0163-E-00

1997/3

- 3 -

PIN/FUNCTION

No.

Pin Name

I/O

Function

1

VREFH

I

Positive Voltage Reference Input Pin, VA

Used as a positive voltage reference by ADC & DAC. VREFH is connected

externally to filtered VA.

2

VREFL

I

Negative Voltage Reference Input Pin, AGND

Used as a negative voltage reference by ADC & DAC. VREFL is connected

externally to AGND.

3

AINR+

I

Rch Analog Positive Input pin

4

AINR-

I

Rch Analog Negative Input Pin

5

AINL+

I

Lch Analog Positive Input pin

6

AINL-

I

Lch Analog Negative Input Pin

7

VA

-

Analog Power Supply Pin

8

AGND

-

Analog Ground pin

9

DIF0

I

Audio Data Interface Format Pin

10

DIF1

I

Audio Data Interface Format Pin

11

LRCK

I

Input/Output Channel Clock Pin

12

SCLK

I

Audio Serial Data Clock Pin

13

SDTI

I

Audio Serial Data Input Pin

14

SDTO

O

Audio Serial Data Output Pin

15

MCLK

I

Master Clock Input Pin

16

DEM0

I

De-emphasis Frequency Select Pin

17

DEM1

I

De-emphasis Frequency Select Pin

18

19

20

TST3

TST2

TST1

I/O

I/O

I

Test Pins (Pull down pins)

Must be left open or connected to DGND.

21

VD

-

Digital Power Supply Pin

22

DGND

-

Digital Ground Pin

23

PWDA

I

DAC Power-Down Mode Pin

24

PWAD

I

ADC Power-Down Mode Pin

25

CMODE

I

Master Clock Select Pin

"H": 384fs, "L": 256fs

26

AOUTL

O

Lch analog output pin

27

AOUTR

O

Rch analog output pin

28

VCOM

O

Common Voltage Output Pin, VA/2

Note: All input pins except pull-down pins should not be left floating.