Texas Instruments
The OPT3101 device is a high-speed, high-resolution AFE for continuous-wave, time-of-flight based proximity sensing and range finding. The device integrates the complete depth processing pipeline that includes the ADC, timing sequencer, and the digital processing engine. The device also has a built-in illumination driver that covers most of the target applications.
Given the high ambient rejection ratio, the device 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 device 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.
Features:
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
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 to 85°C