SM3470BB

Interpolation Encoder IC

SEIKO NPC CORPORATION -

1

OVERVIEW

The SM3470B is an interpolation IC for encoders. It accepts displacement detection, 2-phase analog signals (A and B phases) and a zero

point detection analog signal (Z phase) from an encoder, interpolates the signals by a specified interpolation factor, and outputs

corresponding 2-phase digital signals (A and B phases) and a zero point detection digital signal (Z phase). It incorporates a built-in

EEPROM for interpolation switching and input signal adjustment functions, providing support for system miniaturization and high-speed

input/output signal operation.

FEATURES

▪ Interpolation switching function: ×1, 2, 4, 8, 16, 32, 5, 10, 20 (selectable)

▪Adjustment function: Offset adjustment

▪ Supply voltage: 2.7 to 5.5V

▪ Operating temperature range: –40 to +125°C

▪ Input frequency: 500kHz (max)

▪ Output frequency: 2.5MHz (max)

▪ Package: QFN24 (size: 4mm × 4mm)

ORDERING INFORMATION

Device

Package

24 pin QFN

*1. “-G” option code lead-free package

PACKAGE DIMENSIONS

4.00±0.1

2.40 ±0.1

0.75

A

C0.11

0.2

0.05

0.2

0.08

0.15

S

S

S

S

//

B

A

SAB

0.22±0.05

[unit:mm]

0.50

M