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Specifications
Mfr. Part #:
AEDR-9940-102
Key Attributes
Model Number:
AEDR-9940-102
Product Description
Broadcom AEDR-9940 Three-Channel Reflective Incremental Encoder
The AEDR-9940 is a versatile three-channel reflective optical encoder offering selectable and programmable options for digital or analog differential outputs. It can interface directly with external interpolators in analog mode, providing Sine+, Sine-, Cos+, Cos-, I+, and I- outputs. In digital mode, it delivers two-channel (AB) quadrature outputs and a third channel digital index output, compatible with TTL signal processing circuitry for easy integration. Designed for a wide operating temperature range and small form factor, it is suitable for commercial, industrial, and automotive applications.
Product Attributes
- Brand: Broadcom
- Model: AEDR-9940
- Type: Three-Channel Reflective Incremental Encoder
- Output Options: Analog or Digital Differential
- Package: Surface-mount leadless (4.0 mm x 4.0 mm x 0.7 mm)
- Operating Temperature: -40C to 115C
- Certifications: Not specified in the provided text.
- Material: Not specified in the provided text.
- Color: Not specified in the provided text.
Technical Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| High Encoding Resolution | 198.4375 | LPI (lines/inch) | or 7.8125 LP mm (lines/mm) or 0.128 mm (pitch) |
| Operating Voltage | 3.3V, 5.0V | V | Supply |
| Supply Voltage (VCC) | 3.0 - 3.6 (3.3V) / 4.5 - 5.5 (5.0V) | V | Ripple <100 mVpp |
| Current Consumption (ICC) | 45 | mA | Dependent on spatial position and rotational speed |
| Maximum Output Frequency (External Mode Selection) | 0.25 - 4.00 | MHz | Interpolation dependent (1X to 128X) |
| Maximum Output Frequency (SPI Programmable) | 4.00 | MHz | Interpolation 16X |
| Tangential Misalignment (ET) | 0.35 | mm | CPR dependent, with AutoCal variations |
| Radial Misalignment (ER) | 0.35 | mm | |
| Code Wheel Gap (G) | 0.85 - 2.35 | mm | Typical for 625 CPR, variations for 128 CPR |
| Specular Reflectance (Rf) | 60% | % | Reflective area |
| Non-reflective area | 5% | % | |
| Tri-state Voltage Threshold High | 90 | %VCC | |
| Tri-state Voltage Threshold Low | 10 | %VCC | |
| Tri-state Voltage Threshold Open | 30 - 70 | %VCC | |
| Storage Temperature (TS) | -40 to 125 | C | |
| Operating Temperature (TA) | -40 to 115 | C | |
| Supply Voltage (VCC) Absolute Max | 5.5 | V | |
| Pin Current (All I/O Outputs) | -20 to 20 | mA |
Applications
- Closed-loop stepper motors
- Small motors, actuators
- Industrial printers
- Robotics
- Card readers
- PTZ camera
- Portable medical equipment
- Optometric equipment
- Linear stages
2512221405_Broadcom-AEDR-9940-102_C39751428.pdf
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