AS38-H39E-B13S

Data Sheet AS38-H39E Series 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Introduction The Broadcom® AS38-H39E series encoder is a highresolution optical absolute encoder that offers 23-bit singleturn and 16-bit multi-turn counts, hence a combined 39-bit high resolution. The AS38-H39E series encoder is a house encoder consisting of a patterned disk, a light source, and photosensitive elements to translate the mechanical motion into electrical signal. The AS38-H39E series encoder has a built-in communication protocol that is supported by a full-duplex or half-duplex line transmissions drive, offering good noise immunity for more robust transmission of data up to 10 Mb/s in harsh industrial application. Because the product is intended for industrial application, ESD protection circuitry has been designed in to achieve Class 3 ESD immunity per IEC -61000-4-2 standard. The AS38-H39E series is also compliant with IP50 per IEC 60529 standard. The key advantage of the AS38-H39E series is its multi-turn tracking that employs energy-harvesting technology by harvesting the magnetic energy as the encoder shaft rotates. It is the gearless multi-turn counting that eliminates the gear wear-out or acoustics noise issue that is encountered in conventional geared multi-turn encoder. On the other hand, when comparing to battery backed up multi-turn counting, this technology does not require periodic maintenance of the battery backup components and the down time associated with it. Operating Theory Structures-wise, the encoder contains two main functional blocks: the single-turn optical engine block and the energyharvesting multi-turn counter block. The single-turn engine comprises a Broadcom developed high-performance optical detector ASIC, which is accompanied by high-precision amplifiers circuitry, coupled with a special multi-track code disk that rotates between the LED emitter and detector IC. Broadcom On the multi-turn side, the multi-turn counting is enabled utilizing energy-harvesting technology. When the shaft is rotating, the magnet mounted on the shaft moves in tandem. The energy-harvesting coil module cuts the moving magnet field, and generates energy as a result. The beauty of the energy-harvesting effect is that the same amount of energy is generated independent of the rotation speed. The generated energy is sufficient to power up the revolution tracking circuitry. Therefore, no miscounts occur even in the absence of external power supply. Features     39-bit resolution: 16-bit energy-harvesting multi-turn and 23-bit optical single-turn Built-in communication protocol (option): BiSS C mode, SSI mode and RS-485 half-duplex Overall encoder outer diameter Ø38 mm and maximum height of 40 mm Supporting ¼ inch, 6-mm and 8-mm diameter of the blind hollow shaft Benefits   No battery or capacitor required for position detection during power failure Immediate position detection on power up Applications      Robotics Factory automation Linear positioning system CNC machine tool Medical and lab equipment NOTE: Broadcom encoders are not recommended for use in safety critical applications, e.g., ABS braking systems, power steering, life support systems, and critical care medical equipment. Contact a sales representative if more clarification is needed. AS38-H39E-DS101 December 9, 2019 AS38-H39E Series Data Sheet 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Product Specifications Electrical Specifications Parameter Conditions Min. Typ. Max. Unit Without load, Tamb = 25°C — 115 — mA Supply Voltage — 4.5 5 5.5 V Electrically Permissible Speed — — — 6,000 min–1 Conditions Min. Typ. Max. Unit With electrical correction, Tamb = 25°C — ±80 — Arc-sec Mechanical Permissible Speed — — — 6,000 min–1 Shaft Radial Play — — — ±0.05 mm Shaft Axial Play — — — ±0.1 Starting Torque Tamb = 25°C — — Current Consumption Mechanical Specifications Parameter System Accuracy 9.8 x mm 10–3 N.m Environmental Specifications Parameter Conditions Min. Typ. Max. Storage Temperature — –20 — 105 °C Operating Temperature — –20 — 105 °C RH% Relative Air Humidity (Non-Condensing) Protection Tamb = 40˚C — 90 — — — IP50 — Unit Vibration Per IEC 60068-2-6 — — 10G; 10~2000 Hz Shock Per IEC 60068-2-27 — — 6 ms; Half Sine; 200G Broadcom AS38-H39E-DS101 2 AS38-H39E Series Data Sheet 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Encoder Specifications Parameter Remarks Resolution Single-turn 23-bit (8388607 counts) and Multi-turn 16-bit (65535 counts). Counting Direction Increase with Counter Clockwise (CCW) shaft rotation, view from coupling end (Figure 1). Initialization Time 500 ms. NOTE: After encoder initialization duration of 500 ms upon power-up, perform an alarm clear command before starting to interface with the encoder. Figure 1: Shaft Rotation NOTE: Broadcom Exposure to absolute maximum rating conditions for extended periods might affect reliability. AS38-H39E-DS101 3 AS38-H39E Series Data Sheet 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Interface Diagram The following are examples of the circuit diagram of full-duplex and half-duplex transceiver. Full-Duplex Transceiver (BiSS C Mode/SSI Mode Protocol) Figure 2: Circuit Diagram of Full-Duplex Transceiver Controller Encoder 5V 1 Vcc (5V) Vcc 2 0.1uF GND R GND GND 5V A 5V 1.2kŸ 3 *120Ÿ 4 B 0.1uF GND D Z MA- / SCL- GND 5 D SLO+ / DOUT+ A *120Ÿ 6 Z SLO- / DOUTShield wire GND Transceiver (P/N: SN65LBC179Q) 5V Y MA+ / SCL+ 1.2kŸ Y GND Shield wire R B FG GND Transceiver (P/N: SN65LBC179Q) FG Half-Duplex Transceiver (RS-485 Half-Duplex Protocol) Figure 3: Circuit Diagram of Half-Duplex Transceiver Encoder Controller 5V 1 5V 1.2kŸ A/Y 3 *220Ÿ B/Z D 1.2kŸ DATA+ *220Ÿ 4 DATA- 1.2kŸ DI 0.1uF GND 5V R DE 5V GND GND /RE Vcc 2 5V 0.1uF RO Vcc (5V) Shield wire GND D A/Y DE B/Z /RE 1.2kŸ Shield wire GND DI R RO FG GND GND Transceiver (P/N: ISL8485E) Transceiver (P/N: ISL8485E) FG * Termination resistor, 120Ω and 220Ω are recommended but may depend on the characteristic impedance of cable used. NOTE: Broadcom Connect encoder chassis and cable shield to frame ground (FG) in application for enhanced noise immunity in harsh operating conditions. AS38-H39E-DS101 4 AS38-H39E Series Data Sheet 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Cable Connection Information No Cable Color AS38-H39E-Bxxx (BiSS-C) (Output: 7-Core Cable) AS38-H39E-Kxxx (RS-485 Half-Duplex) (Output: 5-Core Cable) AS38-H39E-Sxxx (SSI) (Output: 7-Core Cable) 1 RED Vcc, Positive Supply Vcc, Positive Supply Vcc, Positive Supply 2 BLACK GND, Ground GND, Ground GND, Ground 3 BROWN MA+ SCL+ DATA+ 4 WHITE MA– SCL– DATA– 5 ORANGE SLO+ DOUT+ N/A 6 BLUE 7 Cable Shield Strand NOTE: Broadcom SLO– DOUT– N/A Cable Shield, Connect to Chassis Cable Shield, Connect to Chassis Cable Shield, Connect to Chassis Cable provided is 200 mm ± 10 mm (included pigtail length) with AWG28. AS38-H39E-DS101 5 AS38-H39E Series Data Sheet 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Mechanical Drawing Package Dimensions Recommended Shaft and Mounting Requirement Notes: Dimensions are in millimeters. 3rd angle projection. Unless otherwise specified, all tolerances are within ±0.5 mm. Recommended to have a recess on motor mounting surface to prevent encoder shaft interference with motor base. Broadcom AS38-H39E-DS101 6 AS38-H39E Series Data Sheet 39-Bit Energy-Harvesting Multi-Turn Absolute Encoder Ordering Information NOTE: Broadcom Refer to factory for sample order and lead time. AS38-H39E-DS101 7 Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, and the A logo are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries, and/or the EU. Copyright © 2017–2019 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. For more information, please visit www.broadcom.com. Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. However, Broadcom does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others.