Broadcom AEDR-871x 3-Channel High Resolution Reflective Incremental Encoder (Digital Outputs)
The Broadcom AEDR-871x encoder is the world's smallest 3-channel optical encoder utilizing Reflective Technology for motion control. Designed for operation between 40C and 85C, it offers high resolution (318 LPI) with built-in interpolation for versatile resolution settings. Its compact size (3.95 mm L 3.4 mm W 0.9562 mm H) and low 3.3V operating voltage make it ideal for miniature commercial and portable applications where space and power are critical. The encoder provides two-channel (AB) quadrature digital outputs and a third index digital output, with TTL compatibility for direct interfacing with signal processing circuitry, ensuring easy integration.
Product Attributes
- Brand: Broadcom
- Product Series: AEDR-871x
Technical Specifications
| Parameter | Min. | Typ. | Max. | Units | Notes |
| Operating Temperature | -40 | 25 | 85 | °C | |
| Supply Voltage | 3.0 | 3.3 | 3.6 | V | Ripple < 100 mVp-p |
| Supply Voltage | 4.5 | 5 | 5.5 | V | |
| Current Consumption | 27 | 60 | mA | ||
| Output Frequency (4x Interpolation) | 240 | kHz | |||
| Output Frequency (8x Interpolation) | 480 | kHz | |||
| Output Frequency (16x Interpolation) | 960 | kHz | |||
| Radial Misalignment | ±0.2 | mm | |||
| Tangential Misalignment | ±0.2 | mm | |||
| Codewheel Gap | 0.5 | 0.75 | 1.0 | mm | |
| Window/Bar Ratio | 0.9 | 1.1 | |||
| Window/Bar Length | 1.80 | mm (inches) | (0.071) | ||
| Specular Reflectance | 60 | % | Reflective area | ||
| Non-reflective area | 10 | Measurements from TMA µScan meter | |||
| Line Density | 12.52 | lines/mm | LPmm = CPR/[2π.Rop(mm)] | ||
| Line Density | 318 | lines/inch | LPI | ||
| High Level Output Voltage | 2.4 | V | IOH = –4 mA | ||
| Low Level Output Voltage | 0.4 | V | IOH = +4 mA | ||
| Output current per channel | 4 | mA | lout | ||
| Rise Time | < 100 | ns | CL ≤ 50 pF | ||
| Fall Time | < 100 | ns | CL ≤ 50 pF |
2509281956_Broadcom-AEDR-8710-102_C22441793.pdf
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