ams OSRAM TMF8820, TMF8821, & TMF8828 Multizone ToF Sensors
ams OSRAM TMF8820, TMF8821, and TMF8828 Multizone Time-of-Flight (ToF) Sensors come in a single modular package with associated vertical-cavity surface-emitting laser (VCSEL). These direct-time-of-flight (dToF) devices are built using a single-photon avalanche diode (SPAD) array, time-to-digital converter (TDC), and histogram technology. The sensors feature an associated vertical-cavity surface-emitting laser (VCSEL), while the high-quality lens on the SPAD supports a dynamically adjustable field of view up to 63°. The highly versatile sensors enable the detection of the target area in multiple zones with extremely precise measurement results. The sensors can also detect multiple objects per zone, allowing automated robots to gain additional sensory awareness and provide early alerts to potential obstacles.
The ams OSRAM TMF8820, TMF8821, and TMF8828 Sensors perform all raw data processing on-chip, and the devices report both distance information and confidence values through an I2C interface. Housed in a single compact modular package, the sensors support a range of demanding applications, including laser detect autofocus for mobile phone cameras, object detection and collision avoidance, presence detection, and light curtain applications for industrial safety designs.
Features
- Modular 2.0mm x 4.6mm x 1.4mm package
- 63° FoI/FoV
- TMF8828: Multizone with 3x3, 4x4, 3x6 and 8x8 zones
- TMF8821: Multizone with 3x3, 4x4 and 3x6 zones
- TMF8820: Multizone with 3x3 zones
- Time-to-Digital Converter (TDC) direct Time-of-Flight measurement
- Single Photon Avalanche Photodiode (SPAD) histogram-based architecture
- Dynamic cover glass calibration
- Reliable operation under demanding use cases
- Reference SPAD
- Distance and signal quality reported
- Fast VCSEL driver with protection
- I3C tolerant - operate on a shared I2C / I3C bus
- 141mW power consumption at 30Hz operation
- 8µA power consumption standby current (keep memory)
- 2µA power-down current consumption (EN=0)
Applications
- Distance measurement for camera autofocus - Laser Detect Autofocus - LDAF (mobile phone)
- Presence detection (computing and communication)
- Object detection and collision avoidance (robotics)
- Light curtain (industrial)
Videos
Block Diagram
Additional Resources
- Latest Optical Sensing Technology Lights the Way Ahead for New Robot Designs
- IEC System for Mutual Recognition of Test Certificates for Electrical Equipment (IECEE) CB Scheme
- Optical Stack Design for TMF882X-SHIELD Board
- ams Optical Sensors Design Recommendations
- TMF8820/TMF8821/TMF8828 Host Driver Communication
- Access Control & Security
- Robotics Solutions
- Optical Solutions
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