SM3471AB

SM3471AB Interpolation Encoder IC OVERVIEW The SM3471 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 (Aand B phases) and a zero point detection digital signal (Z phase). FEATURES ▪ Interpolation switching function: ×2, 4, 8, 16 (selectable) ▪ Input frequency: 300kHz (max) ▪ Output frequency: 2.5MHz (max) ▪ Supply voltage: 2.7 to 5.5V ▪ Operating temperature range: –40 to +125°C ▪ Package: QFN24 (size: 4mm × 4mm) ORDERING INFORMATION Device SM3471AB-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 SM3471AB QFN24 package (Top view) 24 23 22 21 20 19 VSS 1 NC 2 VDD 3 DA 4 DB 5 DZ 6 252T5P 18 VREF 17 NC 16 NC 15 SEL1 14 SEL0 13 ZSEL 7 8 9 10 11 12 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 connecti...