Product Overview
The AEDR-850X is the industry's smallest 3-channel reflective incremental encoder with digital outputs, designed for motion control applications. Its compact size (3.95 mm x 3.4 mm x 0.9562 mm) and surface mount leadless package make it ideal for miniature commercial and industrial applications where space is a critical concern. Operating over a temperature range of 20C to 85C, it offers two-channel quadrature digital outputs for direction sensing and a third channel for index digital output. The TTL-compatible outputs ensure easy integration with most signal processing circuitries, providing significant design flexibility. This encoder is suitable for high-volume applications such as close-loop stepper motors, miniature motors, printers, copiers, card readers, scanners, and projectors.
Product Attributes
- Brand: Avago Technologies
- Technology: Reflective Incremental Encoder
- Package Type: Surface mount leadless
- Moisture Sensitivity Level (MSL): 3
Technical Specifications
| Specification | Parameter | Min. | Typ. | Max. | Unit | Notes |
|---|---|---|---|---|---|---|
| General | Encoder Dimensions (L x W x H) | 3.95 | 3.4 | 0.9562 | mm | |
| Operating Temperature | -20 | 85 | C | Absolute | ||
| Supply Voltage | 4.5 | 5 | 5.5 | V | Ripple < 100mVp-p | |
| Encoding Resolution | 294 | 304 | lines/inch | |||
| Count Frequency (1x Interpolation) | 55 | kHz | @ 11.38 Rop codewheel | |||
| Electrical Characteristics | High Level Output Voltage (VOH) | 2.4 | V | IOH = -1.5 mA | ||
| Low Level Output Voltage (VOL) | 0.4 | V | IOH = +1.5 mA | |||
| Output Current per Channel (IOUT) | 1.5 | mA | ||||
| Rise Time (tr) | <100 | ns | CL = 25pF, RL = 2.7k | |||
| Fall Time (tf) | <100 | ns | CL = 25pF, RL = 2.7k | |||
| Mechanical Characteristics | Radial Misalignment (ER) | 0.2 | mm | |||
| Tangential Misalignment (ET) | 0.2 | mm | ||||
| Codewheel Gap (G) | 0.5 | 1.0 | 1.25 | mm | 1.0mm nominal recommended | |
| Window/bar Ratio (Ww/Wb) | 0.9 | 1.1 | ||||
| Interpolation Factors | SEL 4X | SEL 2X | Interpolation Factor | CPR (@ ROP = 11.38 mm) | Count Frequency | |
| L | L | 1X | 828 | 55 KHz | ||
| L | H | 2X | 1656 | 110 KHz | ||
| H | L | 4X | 3312 | 220 KHz | ||
| Index Gating Options | Model Suffix | Index Gating | ||||
| -00 | Gated 90 | |||||
| -10 | Gated 180 | |||||
| -20 | Gated 360 |
Note: Avago Technologies encoders are not recommended for use in safety critical applications.
2410121803_Broadcom-AEDR-8500-102_C22453375.pdf
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