AEDR-850x 3 Channel Refl ective Incremental Encoders Data Sheet Description Features The AEDR-850X encoder is the smallest 3 channels optical World smallest 3 channels refl ective technology encoder with digital outputs in the market employing encoder. refl ective technology for motion control purposes. The Surface mount leadless package 3.95 mm (L) 3.4 mm encoder is designed to operate over 20C to 85C tem- (W) 0.9562 mm (H) perature range and hence suitable for both commercial 3 channels two channel quadrature digital outputs and even industrial end applications. for direction sensing and a third channel, Index digital The encoder houses an LED light source and a photo- output. detecting circuitry in a single package. The small size of Build in interpolator, factor of 1, 2, and 4 selectable 3.95 mm (L) 3.4 mm (W) 0.9562 mm (H), allows it to be via external pinouts even used in a wide range of miniature commercial appli- TTL compatible cation where size and space is a primary concern. Single 5 V supply The AEDR-850X encoder off ers two-channel quadrature digital outputs and a third channel, index digital outputs. 20C to 85C absolute operating temperature Being TTL compatible, the outputs of the AEDR-850X Encoding resolution: 294 to 304 (lines/inch) encoder can be interfaced directly with most of the signal processing circuitries. Hence the encoder provides great Applications design in fl exibility and easy integration into existing Ideal for high volume applications: systems. Close loop stepper motors R Miniature motors V CC Printers Copiers Gnd Card readers Scanners V CC Projectors Ch A Consumer and industrial product applications Signal Ch B Processing Ch I Circuitry SEL 4X SEL 2X Gnd Codewheel Note: Drawing not to scale. 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. Avagos products and software are not specifi cally designed, manufactured or authorized for sale as parts, components or assemblies for the planning, con- struction, maintenance or direct operation of a nuclear facility or for use in medical devices or applications. Customers are solely responsible, and waive all rights to make claims against Avago or its suppliers, for all losses, damage, expense or liability in connection with such use. Please contact your local sales representative if more clarifi cation is needed. Reflective EncoderOutput waveform Top View C P 360 e Deg A B S1 S2 S3 S4 Anti-clockwise Po Index of 90 e Deg option Encoder Ch. A leads I Ch. B Po Index of 180 e Deg option I Po Codewheel Index of 360 e Deg option I Note: Drawing not to scale. Codewheel rotation movement (Anti-clockwise) QUADRATURE SIGNALS A, B and I Absolute Maximum Ratings Storage Temperature, T 40 C to 85 C S Operating Temperature, T 20 C to 85 C A Supply Voltage, V 7 V CC Output Voltage, V V O CC Notes: 1. Exposure to extreme light intensity (such as from fl ashbulbs or spotlights) may cause permanent damage to the device. 2. CAUTION: It is advised that normal static precautions should be taken when handling the encoder in order to avoid damage and/or degradation induced by ESD. 3. Proper operation of the encoder cannot be guaranteed if the maximum ratings are exceeded. Recommended Operating Conditions ( based on limited prototype samples testing 11.38 Rop codewheel) Parameter Sym. Min. Typ. Max. Units Notes Temperature T -20 25 85 C A Supply Voltage V 4.5 5 5.5 V Ripple < 100mVp-p CC LED Current I 15mA mA See note 1 LED 2 Count Frequency F 55 kHz 1 x Interpolation Factor Radial Misalignment E 0.2 mm R Tangential Misalignment E 0.2 mm T Codewheel Gap G 0.5 1.0 1.25 mm See note 3 Notes: 1. LED Current Limiting Resistor: Recommended series resistor = 180 (1%) 2. Count frequency = velocity (rpm) x CPR / 60. 3. Avago recommends 1.0mm gap as nominal. 2 Amplitude