Miniature reflective incremental encoder Broadcom AEDR-8501-102 designed for digital motion control in tight spaces
Product Overview
The AEDR-850X is the world's smallest 3-channel reflective incremental encoder with digital outputs, utilizing reflective technology for motion control. Designed for operation between -20C and 85C, it is suitable for commercial and industrial applications. Its ultra-compact size (3.95 mm L 3.4 mm W 0.9562 mm H) makes it ideal for miniature applications where space is critical. The encoder offers two-channel quadrature digital outputs for direction sensing and a third channel for index digital output. Its TTL compatibility allows direct interfacing with most signal processing circuitries, providing excellent design flexibility and integration ease.
Product Attributes
- Brand: Avago Technologies
- Technology: Reflective Optical Encoder
- Certifications: Not specified
- Origin: Not specified
- Material: Not specified
Technical Specifications
| Parameter | Symbol | Min. | Typ. | Max. | Units | Notes |
|---|---|---|---|---|---|---|
| Recommended Operating Conditions (based on limited prototype samples testing @ 11.38 Rop codewheel) | ||||||
| Temperature | TA | -20 | 25 | 85 | C | |
| Supply Voltage | VCC | 4.5 | 5 | 5.5 | V | Ripple < 100mVp-p |
| LED Current | ILED | 15 | mA | See note 1 | ||
| Count Frequency | F | 55 | kHz | 1 x Interpolation Factor | ||
| Radial Misalignment | ER | 0.2 | mm | |||
| Tangential Misalignment | ET | 0.2 | mm | |||
| Codewheel Gap | G | 0.5 | 1.0 | 1.25 | mm | See note 3 |
| Encoding Characteristics (Codewheel of Rop @11.38 mm) | ||||||
| Interpolation factor | 1 X | 2 X | 4 X | |||
| Cycle Error | C | 18 | 22 | 36 | e | |
| Pulse Width Error | P | 15 | 20 | 30 | e | |
| Phase Error | 9 | 15 | 18 | e | ||
| State Error | S | 10 | 15 | 25 | e | |
| Index Pulse Width (Gated 90) | PO | 90 | 90 | 90 | e | |
| Index Pulse Width (Gated 180) | PO | 180 | 180 | 180 | e | |
| Index Pulse Width (Gated 360) | PO | Not Available | 360 | 360 | e | |
| Electrical Characteristics (over recommended operating conditions at 25 C) | ||||||
| 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 | |||
| Codewheel Characteristics | ||||||
| Window/bar Ratio | Ww/Wb | 0.9 | 1.1 | |||
| Window/bar Length | LW | 1.80 | mm (inches) | (0.071) | ||
| Specular Reflectance | Rf | 60 | % | Reflective area. See note 1. | ||
| Non reflective area | 10 | % | ||||
| Line Density | LPmm | 11.575 | 11.969 | lines/mm | ||
| Line Density | LPI | 294 | 304 | lines/inch | Recommended LPI is 294 | |
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