AEDA-3300 series ultra miniature, high resolution incremental kit encoders data sheet description the AEDA-3300 series are high performance, cost eff ective, three-channel optical incremental encoder modules with integrated bearing stage. by using transmissive encoder technology to sense rotary position, the AEDA-3300 series emphasizes high reliability, high resolution and easy assembly. outputs of the AEDA-3300 encoders are two channel quadrature and a third channel gated index signals. these encoders can be easily mounted to customer specifi c applications. wide resolution options are available for the AEDA-3300 series, while keeping the same package size across the whole cpr range. the one size fi ts all package eliminates the need for customers to design diff erent platforms for diff erent resolutions. as the AEDA-3300 encoders are designed for high temperature and high operating frequency range, they are well suited for industrial automation and motion control applications note: avago technologies 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. please contact sales representative if more clarifi cation is needed. esd warning: normal handling precautions should be taken to avoid static discharge. features ?? three channels output (quadrature a & b output with index channel) ?? resolution options from 600 to 20000 cycles per revolution (cpr), up to 80000 counts with 4x decoding ?? cost eff ective ?? -40 c to 125 c operating temperature ?? ultra miniature size (? 17 mm) ?? maximum 1 mhz or 650 khz operating frequency ?? maximum 12000 rpm rotational speed ?? single 5 v supply ?? integrated rs 422 diff erential line driver ?? integrated bearing stage for easy mounting ?? bottom-up or top-down mounting options applications ?? motors ?? semiconductor automation machine ?? robotics ?? industrial sewing machine ?? packaging machine ?? machine tools ?? pick and place machines
2 package dimensions C bottom-up version isometric views C bottom-up version * refer to mechanical characteristics table for requirement on the solid shaft diameter. dimensions in mm unless otherwise stated. tolerance: x.x: 0.1mm
3 package dimensions C top-down version (with coupling plate) isometric views C top-down version (with coupling plate) * refer to mechanical characteristics table for requirement on the solid shaft diameter. dimensions in mm unless otherwise stated. tolerance: x.x: 0.1mm
4 absolute maximum ratings storage temperature -40 to 125 c operating temperature -40 to 125 c supply voltage 4.5 v to 5.5 v output voltage -0.5 v to vcc output current per channel 20 ma max frequency 1 mhz note: absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. they are not meant to imply that the device should be operated at these limits. the tables recommended operating conditions and characteristics provide conditions for actual device operation. recommended operating conditions parameter symbol min. typical max. units notes temperature t a -40 25 125 c supply voltage v cc 4.5 5 5.5 v frequency f 1.0 mhz 1. 2. for cpr options of 10 000 cpr and below. gated by maximum rotational speed of 12000 rpm. refer to section. 650 khz 3. 4. maximum frequency and rpm. for cpr options above 10 000 cpr and up to 20 000 cpr please consult factory for special requirements of higher operating frequency encoding characteristics encoding characteristics over recommended operating conditions . typical values represent maximum values at 25 c and 2000 rpm (1000 rpm for options above 10 000 cpr). see output waveform for the defi nitions of the errors. parameter symbol typical max. units remarks pulse width error ? p 30 45 e see note 1 45 60 see note 2 55 70 see note 3 state width error ? s 25 40 e see note 1 30 50 see note 2 50 60 see note 3 phase error ?? 20 20 e see note 1 25 30 see note 2 30 35 see note 3 index pulse width error ? po 15 20 e see note 1 25 45 see note 2 40 45 see note 3 notes: 1. applicable for cpr options of up to and include 4096 cpr 2. applicable for cpr options from 5000 cpr, up to and include 10 000 cpr 3. applicable for cpr options of above 10 000 cpr, and up to 20 000 cpr
5 electrical characteristics tableelectrical characteristics over recommended operating conditions. typical values at 25 c parameter symbol minimum typical maximum units notes supply current i cc 55 100 ma high level output voltage v oh 2.5 3.4 v low level output voltage v ol 0.3 0.5 v mechanical characteristics parameter dimension/details tolerance units remarks standard shaft diameters 1.998 +0/-.01 (+0/-.0005) mm (in) mounting screw size: bottom-up (threaded mount) top-down (coupling plate) m2 m2 weight 12 g bearing material stainless steel miniature precision bearing maximum rpm 12000 see note 1 maximum axial load 8 n based on data provided by bearing manufacturer. maximum radial load 8 n based on data provided by bearing manufacturer. maximum initial torque 3 x 10 -3 nm at 25 c bearing life 3 years based on manufacturers data. 24 hours continuous testing, at 125 c and maximum rpm. note: 1. this value represents the maximum mechanical permissible shaft speed of the kit encoder. however, for options with cpr > 500 0, the maximum shaft speed is limited by the maximum electrical frequency. refer to table maximum frequency and rpm for the comparison of the possible operable frequency and rpm. mechanical and environmental tests test name reference conditions vibration (non-operating) iec 68-2-64 5-2000 hz at 20 g for 6-axis shock (non-operating) iec68-2-27 100 g at 10 ms esd iec 61000-4-2 4 kv electromagnetic compatibility (emc) iec61000-4-4 spike frequency = 5 khz, duration = 15ms, repetition = 300 ms, test points = 1000 & 1500 v humidity iec-68-2-3 85% rh (non-condensing) note: any mechanical shock and vibration exceeding the stated values may cause damage to the encoder. the encoder should not be subjected to excessive mechanical shock and vibration either during installation or operation.
6 maximum frequency and rpm cpr maximum frequency (khz) maximum rpm 600 1000 1 12000 1000 1000 1 12000 1024 1000 1 12000 2000 1000 1 12000 2048 1000 1 12000 2500 1000 1 12000 3000 1000 1 12000 4000 1000 1 12000 4096 1000 1 12000 5000 1000 12000 6000 1000 10000 7200 1000 8300 7500 1000 8000 8000 1000 7500 8192 1000 7300 10000 1000 6000 10240 650 3800 12000 650 3250 14400 650 2700 18000 650 2150 20000 650 1950 notes: 1. maximum allowable operating frequency will be lower due to limitation in maximum permissible mechanical shaft speed. the operable frequency is calculated based on the formula: frequency (khz) = cpr x (rpm / 60 x 10 3 ) as an example, for the 1000 cpr option, the operable frequency is up to 200 khz, i.e.: maximum operable frequency for 1000 cpr option = 1000 x (12000 / 60 x 10 3 ) = 200 khz theory of operation the AEDA-3300 translates rotary motion of a shaft into three channels of digital output. the AEDA-3300 series consists of the following key parts: a single light emitting diode (led) light source, a focusing lens, a high-precision codewheel, a photodetector ic with a set of uniquely confi gured photodiodes, an interpolator ic, and a line driver ic. the led emits light that is used to produce modulated by the codewheel to produce a set of analog signals. a high performance compensation and interpolation ic processes the analog signals to produce the digital a, b and index signals. these digital signals are further fed through a line driver ic that produces the fi nal diff erential outputs for channels a, b, i, and their complements a, b and i. in a single size package, the AEDA-3300 is available for wide selection of cycles per revolution (cpr) options, from 600 to 20000. this translates to a maximum resolution of 80000 counts after quadrature decode (4x), satisfying the ever increasing requirement of higher encoder counts for better motion feedback performance.
7 defi nitions count (n): n refers to the cycles per revolution (cpr) of the encoder output. one cycle (c): 360 electrical degrees (e). one shaft rotation: 360 mechanical degrees, n cycles (rotary motion only). phase ( ? ): the number of electrical degrees between the center of the high state on the channel a and the center of the high state of channel b. this value is nominally 90e. pulse width (p): the number of the electrical degrees that an output is a high-level during one cycle, nominally 180e or ? a cycle. output waveforms pulse width error ( ? p): the deviation in electrical degrees of the pulse width from its ideal value of 180e. index pulse width (po): the number of electrical degrees that an index is high during one full shaft rotation. this value is nominally 180e or ? cycle. 90e (? cycle) index pulse width available upon request. state width (s): the number of the electrical degrees between transitions in the output of the channel b. there are 4 states per cycle, each nominally 90e. state width error ( ? s): the deviation in electrical degrees of each state width from its ideal value of 90e. s1 s2 s3 s4 p c po 0.5v 2.5 v 0.5 v 2.5 v 0.5 v 2.5 v 0.5 v 2.5 v 0.5 v 2.5 v 0.5 v 2.5 v ch. a ch. b ch. i ch. i- ch. a- ch. b- codewheel rotation (counter-clockwise ) amplitude
8 direction of motor rotation when the codewheel rotates in a counter-clockwise direction, channel a will lead channel b (figure 1 illus- trates the defi nition of clockwise direction of codewheel rotation). when the codewheel rotates in a clockwise direction, channel b will lead channel a. electrical interface avago technologies recommends national semicon- ductor ds26c32am quad diff erential line receiver or compatible as line receiver. unused pin should be grounded for noise reduction. shielded cable should be used for better noise immunity. mating connector AEDA-3300 requires a 5 x 2 (1.27 mm x 1.27 mm) female idc connector. the cable used is 0.635 mm pitch fl at ribbon cable. figure 1. as viewed from the top pcb end of the encoder pin assignments pin signal description pin 1 a+ digital output pin 2 a- digital output pin 3 gnd ground pin pin 4 gnd ground pin pin 5 b+ digital output pin 6 b- digital output pin 7 vcc input voltage pin 8 vcc input voltage pin 9 i+ digital output pin 10 i- digital output note: 1. both pin 7 and pin 8 must be connected to vcc. 2. either pin 3 or pin 4 must be connected to gnd. figure 2. recommended receiver circuit. clockwise direction of codewheel rotation. +5v r t a+, b+, i+ a+, b+, i+ a-, b-, i- a-, b-, i- encoder/line driver cable line receiver
ordering information aeda - 3300 ? resolution options cpr counts after 4x decoding a4 600 2400 a6 1000 4000 a7 1024 4096 ab 2000 8000 ac 2048 8192 aj 2500 10000 am 3000 12000 aq 4000 16000 at 4096 16384 b 1 5000 20000 b 7 6000 24000 b j 7200 28800 b k 7500 30000 b m 8000 32000 b n 8192 32768 c 1 10000 40000 c 3 10240 40960 c h 12000 48000 c x 14400 57600 dm 18000 72000 e1 20000 80000 mounting options t top-down, with coupling plate b bottom-up, without coupling plate note: please contact the factory for availability of other cpr options. 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 av01-0084en av02-3570en - june 11, 2012
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