AEAT-84AD-LBSF0 High Temp Multiturn Absolute Encoder Module, 14-bit
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AEAT-84AD 14/12 Bit Multi-turn Encoder Module Data Sheet The AEAT-84AD provides all functions as an optoelectronic-mechanical unit in order to implement, with single turn absolute encoder, an absolute multiturn encoder with a combined capacity of up to 30 bits at extended temperature. 16384 (14bits) and 4096 (12bits) revolution count versions The unit consists of an IR-LED circuit board, a phototransistor (PT) circuit board, and 6 or 7 gear wheels arranged in between the PCBs. Mechanical coupling by means of 14 teeth gear pinion with module of 0.3 Specifications The multi-turn unit is available in the following versions: 12-bit solid shaft 14-bit solid shaft Optical, absolute multi-turn assembly with max. Ø 55 mm and typical height 12.2 mm. Operating temperatures of -40° C to +125° C Operating speeds up to 12,000 rpm A 2 x 4-pole pin strip for power supply and signal Applications Major component of Multi-turn housed encoder Cost effective solution for direct integration into OEM systems Linear positioning system Benefits No battery or capacitor required for number of revolution counting during power failure Immediate position detection on power up

Package Dimensions Notes: 1. 3rd Angle Projection 2. Dimensions are in millimeters 3. Example of matching connector: MPE GARRY 521 Series, No. BL21-43GGG-008 Figure 1. Package dimensions Block Diagram and Detailed Description In the following descriptions, the I/O pins are enclosed by a box, e.g., MTMUX[2:0]. Figure 2. Block Diagram

Multiplexing and Position Data Each of the 1:4 reduced 7 coded gear wheels generates a 3-bit code, from which the 14-bit Gray code can be generated as position data through V-bit processing. The 3-bit code is identical electrically for all gear wheels, only the projection on the mechanical angle (the revolutions) is different according to the 1:4 divisions. The code and the data bits and Vbits to be generated are shown in the Figure 3 for the gear wheel 1: The 3-bit codes of the gear wheels 1 to 7 are output on MTDAT[2:0] demultiplexed with MTMUX[2:0] . Here, the binary value on MTMUX[2:0]...

Gray code-generation Logic Diagram For the readout schematic of the multi-turn code gears, i.e. with the user’s microcontroller, there must be a logical replication of the V-bit multiplexers. This can be done by a bit manipulation or by look up tables. Care needs to be taken with the real time readout conditions. From MTDAT-Demux (Code-Wheel x) 1. The 3 bits ( MTDAT[2:0] ) of each gear (C1[2:0] to C7[2:0]) are continuously de-multiplexed. Thus there are maximal 3 bits x 7gears = 21-bit AEAT-84AD data in parallel. 2. Synchronous to the readout of the single turn absolute encoder, those...

The Figure 5 shows the cascading of the V-bit- Multiplexer of all gear wheels. The outputs are the 14bits Gray code in parallel. V-bit-Multiplexer Cascade C7[2] Demuxed Code-Wheel 7 The MSB of the complete code is dependant on the total resolution of the system. It can be used in steps of 2 bits (14Bit,12Bit,…etc). Unused higher bits should be masked to logical zero. There is an IC available to combine both the AEAS-7x00 13/16 bit single turn component and the AEAx- 84AD 12/14 bit multiturn module into one-single powerful multi-turn absolute encoder. This one-stop solution enables the...

Application Example of Multiturn Absolute Encoder bit settings are application specific MT-Conflg 1#16 *2FF CODE MT-STCR CFG N2L16 SRADD2 GRAY MTDIR VDDi C-ND VDOa DCLK CLKQ HCLK Clock Oscillator Examples PRESC MFFPEQ MFTIME Serial Interface bit settings are application specific Reset Circuit Example 1/6HC14 _I_ resettime stiouW be related to escalator startup-time Figure 6. Application example of integration of single-turn absolute encoder module and multiturn module using MUIC. Part Number_Resolution_Temperature (°C)_Output Format_Voltage (V) 1. SSI interface is enabled through MUIC....

Parameter Symbol Limits Units Moisture Level (Non-Condensing) O/ORH 85 % Encoder Shaft Speed SRPM Max 12000 rpm Storage Temperature Tstg -40to125 °C 1. Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not 2. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 3. This device meets the ESD ratings of the IEC61000-4-2 Level 2...

Timing Characteristics Timing Characteristics over Recommended Operating Range, typical at 25° C Values Parameter Input Transition Rise/Fall Time Multiplex Read Delay Encoder Shaft Speed Figure 7. Timing Characteristics of MTMUX[2:0] and MTDAT[2:0]

Application Note The encoder is mechanically fixed by means of holes in adapters, which accommodate M3 threads. The encoder has 2 adapters for attaching in a 3 x 120° and 4 x 90° arrangement. For details, please refer to the mechanical drawings in Figure 1. The mechanical coupling of the encoder shaft is realised by means of gear pinion with a module of 0.3, 14 teeth. The zero positions of the coupling wheels are locked with a plastic plug for alignment to the single turn absolute encoder, with the coupling wheel being able to compensate for an angle error of about +/-7°. The electrical...

Ordering Information AEAT-84AD-LBSC0 multi-turn, -40 to +125° C, solid shaft, serial, 12 bit AEAT-84AD-LBSF0 multi-turn, -40 to +125° C, solid shaft, serial, 14 bit For ordering information of MUIC, please refer to factory. 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. j» _ _ ^m Data subject to change. Copyright © 2005-2012 Avago Technologies. All rights reserved. Obsoletes AV01-0275EN ^O/iU ^3