Texas Instruments' OPT3101 is a high-speed, high-resolution AFE for continuous-wave, ToF-based proximity sensing and range-finding. This device integrates the complete depth processing pipeline that includes the ADC, timing sequencer, and the digital processing engine. It also has a built-in illumination driver that covers most of the target applications.
Given the high ambient rejection ratio, this AFE can support very high ambient conditions, including full sunlight of 130 klx.
The timing sequencer is highly configurable to provide for application-specific trade-offs of power versus performance.
The OPT3101 provides depth data that consists of phase, amplitude, and ambient measurements. The calibration subsystem supports phase-data calibration for inaccuracies resulting from temperature and crosstalk.
Resources
- Blog: Smart robots coming soon to a cubicle or kitchen near you
- Application Note: How sensor data is powering AI in robotics
| Features |
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- Long-range distance measurement; obstacle detection and avoidance
- Flexibility to customize design with a wide variety of photodiodes and emitters
- Sample rate up to 4 kHz
- 16-bit distance output at 15 m unambiguous range
- De-aliasing to extend the distance range
- Supports 3 transmitter channels for multi-zone operation
- Excellent ambient and sunlight rejection
- 200 nA full-scale signal current
- 88 dB signal phase dynamic range at 1 kHz
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- Supports DC ambient up to 200 µA, 60 dB rejection for ambient at 1 kHz
- Distance measurement independent of object reflectivity
- Adaptive HDR to save power and increase the dynamic range
- Configurable event detection and interrupt output mechanism
- I2C interface for control and data
- Integrated illumination driver with programmable current control up to 173 mA
- Integrated temperature sensor for calibration
- Single 3.3 V or 1.8 V and 3.3 V supply operation
- Operating ambient temperature: -40°C to +85°C
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| Applications |
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- Precise long-range distance measurement
- Background suppression and accurate object counting in high-speed conveyor belt systems
- Precise displacement sensing in factory automation
- Non-contact distance and/or level measurement in harsh environments (high-temperature or hazardous conditions)
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- Obstacle detection and avoidance
- Precise distance measurement for drone landing and navigation
- Cliff and edge detection in vacuum cleaners (no false triggers from dark carpets)
- Perimeter scan in automatic guided vehicle like lawnmowers and robots
- Obstruction sensing in applications such as smoke detectors and emergency exits
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