Product description: SparkFun Qwiic Mini dToF Imager - TMF8821 - distance sensor 1-500 cm - SparkFun SEN-19451
Distance sensor manufactured by SparkFun in mini version. It was equipped with the TMF8821 system, which measures in the range from 1 cm to 500 cm . The operation of the sensor is based on the time-of-flight (ToF) technology - the distance from the obstacle is calculated on the basis of the time difference between the light pulses. SparkFun Qwiic dToF Imager detects objects regardless of their color, reflectance or texture. It allows for excellent measurement performance in both dark and sunny places. The communication module uses the I2C interface, it is supplied with the voltage from 2.7 V to 3.6 V.
Check also the user's guide prepared by the manufacturer!
SparkFun Qwiic Mini dToF Imager - TMF8821 - distance sensor 1-500 cm - SparkFun SEN-19451.
Special features of the distance sensor
- Multi-zone VCSEL Vertical Cavity Surface Emitting Laser by AMS - TMF8821 system
- Direct ToF technology with high SPAD detection sensitivity
- 3x3, 4x4 and 3x6 multi-zone configuration
- Very wide, dynamically adjustable field of view
- Fast Time-to-Digital Converter (TDC) Architecture
- Light pulse less than 1 ns
- Processing the histogram on the chip
- Built-in filter and algorithm to limit the influence of sunlight
- The compact dimensions allow the sensor to be used in non-standard projects
Kit contents
- SparkFun Qwiic Mini dToF Imager - TMF8821 - distance sensor 1-500 cm - SparkFun SEN-19451 - 1 piece
Leads of the distance sensor
The module with the TMF8821 distance sensor for communication uses the I2C interface. It is supplied with the voltage from 2.7 V to 3.6 V. It has two connection alternatives - with Qwiic connectors or solder pads.
- GND - the ground of the system
- 3V3 - power supply 3.3 V
- SDA - data line of the I2C bus
- SCL - clock line of the I2C bus
- INT - interrupt pin
- GP0 - general purpose input / output, pin can be used to connect to SYNC signal to interrupt TMF8820 / TMF8821
- GP1 - general purpose input / output
- EN - reset pin
The board has Qwiic connectors that facilitate the process of connecting the module.
ToF distance sensor.
Specification of the module with TMF8821 sensor
- Built-in chip: TMF8821
- Measurement technology: ToF Time of flight
- Supply voltage: 2.7 V to 3.6 V (3.3 via Qwiic connector)
- Power consumption:
- standby mode: 8 uA
- active mode: 57 mA
- Distance measuring range: 1 cm to 500 cm at 30 Hz
- Maximum reading speed: up to 30 Hz
- Zone operation: 3x3, 4x4 and 3x6
- Laser beam: 940 nm VCSEL class 1
- Field of view: diagonally adjustable up to 63 °
- Communication interface: I2C bus
- I2C address: 0x41
- Tile sizes: 12.7 x 25.4 mm
