AEDT-9811-W00

AEDT-981x High Temperature 115°C, High Resolution, Three Channels Optical Incremental Encoder Modules Data Sheet Description Features Avago Technologies' AEDT-981x encoders are industrial grade high temperature (-40 to 115°C) rating three channel optical incremental encoder modules building on the Avago legacy HEDS-9140 series. • -40°C to 115°C Operating Temperature Using an Avago developed opto ASIC with the built-in Interpolator circuit, AEDT-981x encoders enable wide resolution range from 2000 to 5000 count per revolution with the rotary codewheel of 11mm optical radius, offering a high resolution yet compact solution. With the opto-ASIC’s built-in automatic LED brightness regulation technique, the encoder current consumption can be significantly lowered (Typ. Icc: 20mA) while maintaining optimal encoder performance across spatial corners. This LED brightness control feature also enables optimal LED current control hence LED life can significantly pro-longed. With the state of the art opto-mechanical design, AEDT981x offers excellent spatial play of ∅ 0.40mm and code wheel gap range of ±150um. This allows great flexibility and ease of installation to the user. Inheriting the indefeasible integrity in product robustness, repeatability and reliability, AEDT-981x series are designed for wide market employment withstanding wide application requirement and environment demand. • Two Channel Quadrature Output with Index Pulse • Single ended output with ±5mA output sink/source current per channel • Suitable for Industrial Applications • Resolution up to 5000 Counts per Revolution • Low Power Consumption (Typical Icc: 20 mA) • No Signal Adjustment Required • Pin Compatible to legacy HEDS-9xxx Series • Spatial play tolerance of ∅ 0.40mm • Allows motor shaft axial play of ±0.15mm • ESD Immunity HBM 4kV (JESD22-A114D) Applications The AEDT-981x series provide high temperature motion control detection with ease of installation, making them suitable for wide range of commercial & industrial applications. Note: Avago Technologies encoders are not recommended for use in safety critical applications. Eg. ABS braking systems, power steering, life support systems and critical care medical equipment. Please contact sales representative if more clarification is needed. CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. Package Dimensions Figure 1. Mounting Considerations with Aligning Pin The AEDT-981X can be mounted using fixed aligning pins on the motor base. For this configuration, Side A or B can be used as the mounting plane as shown. Figure 2. 2 Orientation of Artwork for Codewheels The Index area on the AEDT-981X series encoder modules has a nonsymmetrical pattern as does the mating Codewheel. In order for the Index to operate, the “Rightreading” side of the Codewheel disk (the “Artwork Side”) must point toward “Side A” of the Module (the side with the connecting pins). Because the Encoder Module may be used with either “Side A” or with “Side B” toward the mounting surface, care must be taken to orientate the code wheel artwork side according to Figure below. SIDE A SIDE B ART WORK SIDE ART WORK SIDE SIDE A Figure 3. 3 SIDE B Output Waveforms C P CH. A AMPLITUDE φ S1 S2 S3 S4 CH. B t2 t1 5 4 3 2 1 CH. I P0 ROTATION * * SPIN DIRECTION FOLLOWS ARROW MARKING ON ENCODER Figure 4. Definitions Count (N): The number of bar and window pairs or counts per revolution (CPR) of the codewheel State Width Error (ΔS): The deviation, in electrical degrees, of each state width from its ideal value of 90°e. One Cycle (C): 360 electrical degrees (°e), 1 bar and window pair Phase (φ): The number of electrical degrees between the center of the high state of channel A and the center of the high state of channel B. This value is nominally 90°e for quadrature output. One Shaft Rotation: 360 mechanical degrees, N cycles Position Error (ΔQ): The normalized angular difference between the actual shaft position and the position indicated by the encoder cycle count Phase Error (Δφ): The deviation of the phase from its ideal value of 90°e. Cycle Error (ΔC): An indication of cycle uniformity. The difference between an observed shaft angle which gives rise to one electrical cycle, and the nominal angular increment of l/N of a revolution Direction of Rotation: When the codewheel rotates in the direction of the arrow on top of the module, channel A will lead channel B. If the codewheel rotates in the opposite direction, channel B will lead channel A. Pulse Width (P): The number of electrical degrees that an output is high during 1 cycle. This value is nominally 180°e or 1/2 cycle Optical Radius (ROP): The distance from the codewheel’s center of rotation to the optical center (O.C.) of the encoder module. Pulse Width Error (ΔP): The deviation, in electrical degrees, of the pulse width from its ideal value of 180°e Index Pulse Width (Po): The number of electrical degrees that an index is high during one full shaft rotation. This value is nominally 90°e or 1/4 cycle. State Width (S): The number of electrical degrees between a transition in the output of channel A and the neighboring transition in the output of channel B. There are 4 states per cycle, each nominally 90°e. 4 Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units Storage Temperature TS -40 125 °C Operating Temperature TA -40 115 °C Supply Voltage VCC -0.5 7 V Output Voltage VO -0.5 Vcc V Output Current per Channel IOUT ±5 mA 12,000** RPM Velocity Note **: Velocity 12000 RPM applies to 5000 Count per Revolution Recommended Operating Conditions Parameter Symbol Min. Temperature TA -40 Supply Voltage VCC 4.5 Load Capacitance Output Frequency Typ. Max. Units 115 °C 5.5 Volt CL 100 pF f 500 kHz 2000 – 2500 CPR 1,000 kHz 4000 – 5000 CPR Shaft Perpendicularity Plus Axial Displacement ± 0.15 (± 0.006) mm (in.) Spatial play (including shaft eccentricity) Ø0.40 (0.016) mm (in.) 5.0 Notes Ripple < 100 mVp-p Encoding Characteristics Encoding characteristics are applicable per the Recommended Operating Conditions, unless otherwise specified. Values are for the worst case error over the full rotation. Encoder Resolution ≥ 4000 CPR Parameter Symbol Pulse Width Error Min Typ.* Max Units DP 21 45 °e Logic State Width Error DS 17 45 °e Phase Error Df 12 25 °e Cycle Error DC 36 60 °e Index Pulse Width P0 65 90 115 °e Parameter Symbol Min Typ.* Max Units Pulse Width Error DP 20 30 °e Logic State Width Error DS 15 25 °e Phase Error Df 10 15 °e Cycle Error DC 17 30 °e Index Pulse Width P0 90 108 °e Encoder Resolution ≤ 2500 CPR 72 * Typical values specified at VCC = 5.0V and 25ºC and for single ended, unless otherwise stated 5 Electrical Characteristics Electrical Characteristics over Recommended Operating Range Parameter Symbol Min. Typ.* Max. Units Notes Supply Current ICC 20 80 mA No load High Level Output Voltage VOH V IOH = -5 mA Low Level Output Voltage VOL Rise Time tr 10 V IOL = 5 mA. ns CL = 100 pF at ±5mA Fall Time tf 10 ns CL = 100 pF at ±5mA 2.4 0.4 *Typical values specified at VCC = 5.0 V, 25°C and nominal sensor position. Electrical Interface The AEDT-918x Series encoders output circuitry are designed with high speed and high drivability sink/source output of ± 5mA without the need of pull up resistors. The high drivability offers rail to rail VOH and VOL, giving the end customer better noise margin in signal processing hence more reliable in industrial application. 5V DC 5 4 3 2 1 CH, B VCC CH, A CH, I GND To Servo Drives Inputs Figure 5. Connectors Manufacturer Part Number AMP 103686-4 640442-5 Avago HEDS-8902 (2 ch.) with 4-wire Leads HEDS-8903 (3 ch.) with 5-wire Leads Molex Figure 6. 6 2695 series with 2759 series term. Ordering Information Three Channel Encoder Modules A E D T - 9 8 1 X - X 0 0 Lead Termination 0 1 Straight Leads Bent Leads Resolution CPR B J L T U W N R Z 1000 1024 1250 2000 2048 2500 4000 4096 5000 DISCLAIMER: Avago’s products and software are not specifically designed, manufactured or authorized for sale as parts, components or assemblies for the planning, construction, maintenance or direct operation of a nuclear facility or for use in medical devices or applications. Customer is solely responsible, and waives all rights to make claims against Avago or its suppliers, for all loss, damage, expense or liability in connection with such use. For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright © 2005-2015 Avago Technologies. All rights reserved. AV02-4924EN - June 2, 2015