SM3470BB

SM3470BB Interpolation Encoder IC 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 SM3470BB-G*1 Package 24 pin QFN *1. “-G” option code lead-free package PACKAGE DIMENSIONS 0.2 S A 4.00±0.1 A B 0.2 S B 0.75 C0.11 2.40 ±0.1 0.45±0.1 0.75 2.40 ±0.1 4.00±0.1 C0.03 0.50 // 0.2 S S 0.08 S 0.15 0.22±0.05 0.05 MAX 0 MIN 0.65 MAX 0.50 0.22±0.05 0.05 M S AB [unit:mm] SEIKO NPC CORPORATION - 1 PINOUT SM3470BB QFN24 package (Top view) IO1 B NC BN NC A IO2 AN IO3 Z VPP ZN PIN DESCRIPTION Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 *. I: Input pin Name VSS NC VDD DA DB DZ IO1 NC NC IO2 I...