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Specifications
Sensing Distance:
1mm
Mfr. Part #:
AEDR-8502-100
Package:
SMD-8P
Key Attributes
Model Number:
AEDR-8502-100
Product Description
Product Overview
The AEDR-850X is the smallest 3-channel optical encoder utilizing reflective technology for motion control. Designed for operation between -20C and 85C, it is suitable for commercial and industrial applications. Its compact size (3.95 mm x 3.4 mm x 0.9562 mm) makes it ideal for miniature devices where space is critical. The encoder offers two-channel quadrature digital outputs and a 3rd channel index digital output, with TTL compatibility for easy integration into signal processing circuitry. It features a built-in interpolator with selectable factors (1x, 2x, 4x) and operates on a single 5V supply.
Product Attributes
- Brand: Avago Technologies
- Technology: Reflective Optical Encoder
- Package: Surface mount leadless
- Moisture Sensitivity Level (MSL): 3
Technical Specifications
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
| Absolute Maximum Ratings | ||||||
| Storage Temperature | TS | -20 | 85 | C | ||
| Operating Temperature | TA | -20 | 85 | C | ||
| Supply Voltage | VCC | 7 | V | |||
| Output Voltage | VO | VCC | V | |||
| Recommended Operating Conditions | ||||||
| Temperature | TA | -20 | 25 | 85 | C | |
| Supply Voltage | VCC | 4.5 | 5 | 5.5 | V | Ripple < 100mVp-p |
| LED Current | ILED | 15 | mA | Recommended series resistor = 180 (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) | ||||||
| Parameter | Symbol | 1 X | 2 X | 4 X | Unit | Notes |
| Cycle Error | C | 18 | 22 | 36 | e | Typical values represent encoder performance at typical mounting alignment. |
| Pulse Width Error | P | 15 | 20 | 30 | e | Maximum values represent encoder performance across recommended mounting tolerance. |
| 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 | ||||||
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
| 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 | IO | 1.5 | mA | |||
| Rise Time | tr | <100 | ns | CL = 25pF, RL = 2.7k | ||
| Fall Time | tf | <100 | ns | |||
| Codewheel Characteristics | ||||||
| Parameter | Symbol | Min. | Max. | Unit | Notes | |
| Window/bar Ratio | Ww/Wb | 0.9 | 1.1 | |||
| Window/bar Length | LW | 1.80 | mm (inches) | |||
| Specular Reflectance | Rf | 60 | % | Reflective area. | ||
| Non-reflective area | 10 | % | ||||
| Line Density | LPmm | 11.575 | 11.969 | lines/mm | ||
| Line Density | LPI | 294 | 304 | lines/inch | Recommended LPI is 294 | |
2410301827_Broadcom-AEDR-8502-100_C17342243.pdf
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