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SMD-01

NPC
Part Number SMD-01
Manufacturer NPC
Description Optical Encoder Head
Published Feb 20, 2016
Detailed Description SMD-01 Optical Encoder Head OVERVIEW The SMD-01 is a high-precision optical encoder that employs a diffraction image pr...
Datasheet PDF File SMD-01 PDF File

SMD-01
SMD-01

Overview
SMD-01 Optical Encoder Head OVERVIEW The SMD-01 is a high-precision optical encoder that employs a diffraction image projection method.
It incorporates an OEIC (Opto-Electric Integrated Circuit) and LED light source in a single package.
Light emitted from the LED is projected onto a scale, and the reflected diffraction image is focused on a photodiode.
The reflected light contains position information that is recovered to detect the relative movement between the SMD-01 and the scale.
In addition, the light receiver employs a photodiode array to reduce the degradation in phase characteristics due to dependency on mounting position error, making the SMD-01 easier to mount.
FEATURES I Package: Miniature clear-mold package (5.
3 × 4.
3 × 1.
68mm) I Output signal period: 20µm (Uses 20µm period A-phase/B-phase signals to achieve 5µm resolution) I Optimized OEIC and optics design for easy mounting alignment I LED and OEIC fabricated in a single package I Adjustable LED brightness using external inputs I Analog (sine wave) output I Supply voltage: 3.
13 to 5.
25V I Current consumption: 12.
2mA (typ) PINOUT (Top view) SWL1 1 SWL2 2 VCC 3 NC 4 NC 5 NC 6 SWV 7 14 GND 13 NC 12 VA 11 VAB 10 VB 9 VBB 8 VREF APPLICATIONS I Linear motors I Precision stages I Sliders I Mounting equipment I Robots I Angle measurement equipment I Various encoder devices PACKAGE DIMENSIONS (Unit: mm) 0.
4 ± 0.
1 Top view 5.
3 ± 0.
1 LED Slit 4.
3 ± 0.
1 0.
6 × 6 = 3.
6 1.
68 ± 0.
15 (0.
3) Head center OEIC Side view 1 Gold (Au) electrodes Side view 2 Epoxy resin Glass-epoxy substrate 0.
3 ± 0.
075 0.
6 × 6 = 3.
6 14 − R0.
15 Bottom view 0.
6 SEIKO NPC CORPORATION —1 BLOCK DIAGRAM SMD-01 Non-reflective base Reflective grating VCC LED Photodiodes Scale GND SWL1 SWL2 SWV LED Driver Signal Processor IC Photodiode IC Encoder Head VA VAB VB VBB Vref PIN DESCRIPTION Number 1 2 3 4 5 6 Name SWL1 SWL2 VCC NC NC NC 7 SWV 8 VREF 9 VBB 10 VB 11 VAB 12 VA 13 NC 14 GND *1.
Ip: input with built-in pull-up re...


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