DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 10
Technical content
Features
Small Size Built-in guide bumps for codewheel and codestrip Low Package Height Insensitive to Radial, Tangential and Axial Play 0° C to +70° C recommended operating temperature Wide Resolution Range Two Channel Quadrature Output TTL 3.3 V or 5.0 V CMOS compatible For Linear and Rotary Application Wave solderable RoHS Compliant
Applications
Printers Copiers/Fax Plotters Offi ce Automation Equipments
The AEDS-964X is a C-shaped emitter/detector module. Coupled with a codewheel, it translates rotary motion into a two-channel digital output; coupled with a codestrip, it translates linear motion into a two-channel digital output. As seen in the Figure 1, the module contains a single Light Emitting Diode (LED) as its light source. The light is collimated into parallel beam by means of a single lens located directly over the LED. Opposite the emitter are the integrated detector circuits. This IC consists of multiple sets of photodetectors and a signal processing circuitry necessary to produce the digital waveforms. The codewheel/codestrip moves between the emitter and detector, causing the light beam to be interrupted by the pattern of spaces and bars on the codehweel/codestrip. The photodiodes that detect these interruptions are arranged in a pattern that corresponds to the radius and count density of the codewheel/0codestrip. These detectors are also spaced such that a light period on one pair of detectors corresponds to a dark period on the adjacent pairs of detectors. The photodiode outputs are fed through the signal processing circuitry. Two comparators receive these signals and produce the fi nal outputs for Channels A and B. Due to this integrated phasing technique the output of channel A is in quadra- ture with Channel B (90 degrees out of phase). Defi nitions Note: Refer to Figure 1 for the output waveform Count (N): The number of bar and window pairs or counts per revolution (CPR) of the codewheel. Or the number of lines per inch of the codestrip (LPI) 1 shaft Rotation = 360 degrees = N cycles 1 cycle (c) = 360 electrical degree, equivalent to 1 bar and window pair. Pulse Width (P): The number of electrical degree that an output is high during one cycle. This value is nominally 180° e or ½ cycle. Pulse Width Error (P): The deviation, in electrical degrees, of the pulse width from its ideal value of 180° e. State Width (S): The number of electrical degrees between a transition in the output of channel A and the neighbor- ing transition in the output of channel B. There are 4 states per cycle, each nominally 90° e. State Width Error ( S): The deviation, in electrical degrees of each state width from its ideal value of 90°. Phase (): 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. Phase Error ( ): the deviation of the phase from its ideal value of 90° e. Direction of Rotation: When the codewheel rotates in the counter clockwise direction (as viewed from the encoder end of the motor), channel A will lead channel B. If the codewheel rotates in the clockwise direction, channel B will lead channel A. Optical Radius (Rop): The distance from the codewheel’s center of the rotation to the optical center (O.C) of the encoder modules. Angular Misalignment Error (E A): Angular misalignment of the sensor in relation to the tangential direction. This applies for both rotary and linear motion. Mounting Position (RM): Distance from Motor Shaft center of rotation to center of Alignment Tab receiving hole.
AEDS-964x Series Block Diagram Output Waveform
Parameter Symbol Min. Max. Units Notes Storage Temperature T S -40 85 °C Operating Temperature T A 07 0 ° C Supply Voltage (Detector) V CC -0.5 7 Volts Output Voltage V o -0.5 Vcc V Output current per channel I o -1.5 10 mA Option P – 150 LPI -1.5 17 mA Option 1 & 2 – 360 LPI Soldering Temperature T SOL 260 °C t ≤ 7 sec DC Forward I LED 40 mA V F < 1.8 V Reverse Voltage V R 5V IR = 100 A Subjecting the part to stresses beyond those listed under this section may cause permanent damage to the device. These are stre ss ratings only and do not imply that the devices function beyond these ratings. Exposure to the extremes of these conditions for extended periods may aff ect device reliability. Recommended Operating Conditions Parameter Symbol Min. Typ. Max. Units Notes Temperature T A 02 5 7 0 ° C Supply Voltage (Detector) V CC 2.8 3.3 or 5.0 5.5 Volts Ripple < 100 mVpp Load Capacitance C L 100 pF Pullup Resistor R pull none k Recommended no pullup. Count Frequency C f 60 kHz Velocity (rpm) x N/60 Angular Misalignment E A -3.0 0.0 +3.0 Deg. Mounting consideration Mounting Position R M ROP – 2.4 (Rop-0.095”) mm (inch) * Refer to mounting consideration DC Forward Current (LED) @ Vcc = 3.3 V ILED 10 16 20 mA Recommended 110 (±10%) series resistor between 3.3 V supply and V LED.
Encoding Characteristics over the Recommended Operating Conditions and Mounting Conditions. These characteristics do not include codewheel/codestrip contribution. 1. The typical values are average over the full rotation of the codewheel at Nominal Mouting Position and Typical Operating Conditions. 2. For a codestrip, the Typical Values are obtained at zero angular displacement and Typical Operating Conditions. 3. Maximums are the worst case values predicted over the full range of Recommended Mounting Tolerances and Operating Conditions, with consideration to popu- lation shift. Parameter Symbol Typ. Max. Units Pulse Width Error P 74 0 e Logic State Width Error S 54 0 e Phase Error 22 0 e
Electrical Characteristics
Electrical Characteristics over Recommend Operating Range, typical at 25° C Parameter Symbol Min. Typ. @ 3.3 V Max. Units Notes Supply Current (Detector) I CC 1.5 3.0 8 mA High Level Output Voltage Option P – 150 LPI Option 1 & 2 – 300 & 360 LPI V OH 2.4 2.4 3.3 3.3 5.2 5.2 V V Typ. IOH = -0.7 mA @ 3.3 V Typ. IOH = -0.4 mA @ 3.3 V Low Level Output Voltage Option P – 150 LPI Option 1 & 2 – 300 & 360 LPI V OL 0.4 0.4 V V Typ. IOH =8 mA @ 3.3 V Typ. IOH = 13 mA @ 3.3 V Rise Time t r 200 ns C L = 25 pF RL = 11 kFall Time t f 50 ns LED Forward Voltage V F 1.3 (turn on) 1.6 1.8 V Typical I F = 16 mA Note: Refer to Figure 2 for output waveform on tr and tf
Note: These dimensions include shaft end play and codewheel warp. All dimensions for mounting in the module and codewheel/codestrip s hould be measured with respect to the two mounting post shown above. For AEDS-964X-P10 Error Rop = 11.00 mm Unit Notes Eg Gap ± 0.15 mm Recommend CW to put closer to the detector side (upper side), in order to give enough margin for encoder operation. Er Radial ± 0.13 mm Et Tangential ± 0.13 mm Ea Angular ± 3 Deg. For AEDS-964X-210 and AEDS-964X-110 Error Rop = 23.36 mm Unit Notes Eg Gap ± 0.15 mm Recommend CW to put closer to the detector side (upper side), in order to give enough margin for encoder operation. Er Radial ± 0.26 mm Et Tangential ± 0.28 mm Ea Angular ± 3 Deg.
AEDS-9640-X10 (Straight Lead)
AEDS-9641-X10 (Bent Lead)
Recommended Wave Solder Profi le 120°C/120 sec Max Cool DownReflow 7 sec Max 260 °C Pb-free Wave Soldering Profile - Std-Profile 2 Time (s) Temperature (°C) C B A Parameter Min. Max. Nominal values Units A Solder Pot Temperature NA 260 250 – 260 °C B Preheat Zone Temperature 85 120 100 – 120 °C C Dip in Time 5 7 5 sec D Solder Pot Zone (Encoder Lead) 200 260 NA °C Notes: – Nominal values are evaluated profi les for optimum performance. – Min/Max are critical limits to ensure encoders in good condition.
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 © 2005-2012 Avago Technologies. All rights reserved. Obsoletes AV01-0286EN AV02-3574EN - June 11, 2012