SM3471AB

SEIKO NPC CORPORATION - 2

PINOUT

QFN24 package

(Top view)

PIN DESCRIPTION

Pin No.

Name

I/O

*1

Description

1

VSS

-

Ground

2

NC

-

No connection

3

VDD

-

Power supply

4

DA

O

Displacement detector signal output (A)

5

DB

O

Displacement detector signal output (B)

6

DZ

O

Zero point detector signal output (Z)

7

NC

-

No connection

8

NC

-

No connection

9

NC

-

No connection

10

VSS

-

Ground

11

VSS

-

Ground

12

NC

-

No connection

13

ZSEL

I

Z-phase output timing setting input with pull-down resistor

14

SEL0

I

Interpolation setting input with pull-down resistor

15

SEL1

I

Interpolation setting input with pull-down resistor

16

NC

-

No connection

17

NC

-

No connection

18

VREF

O

19

ZN

I

Zero point detector inverse-phase signal input

20

Z

I

Zero point detector signal input

21

AN

I

Displacement detector signal (–cos) input

22

A

I

Displacement detector signal (cos) input

23

BN

I

Displacement detector signal (–sin) input

24

B

I

Displacement detector signal (sin) input

25

TP

-

Thermal pad. Connect to VSS or leave OPEN.

*1. I: Input pin

O: Output pin

I/O: Input/Output pin

VSS terminals number 1, 10 and 11 must be connected to the ground on the mounting board.

13

14

15

16

17

18

12

11

10

9

8

7

6

5

4

3

2

1

19

20

21

22

23

24

VSS

VDD

DA

DB

DZ

NC

VREF

NC

NC

SEL1

SEL0

ZSEL

25

25TP