Proximity sensing module - STMicroelectronics

1 This is information on a product in full production. July 2021 DocID024986 Rev 141/73VL6180 Proximity sensing moduleDatasheet - production dataFeatures Two-in-one smart optical module VCSEL light source Proximity sensor Fast, accurate distance ranging Measures absolute range from 0 to 62 cm max (depending on conditions) Independent of object reflectance Ambient light rejection Cross-talk compensation for cover glass Gesture recognition Distance and signal level can be used by host system to implement gesture recognition Demo systems (implemented on Android smartphone platform) available.

2 Easy integration Single reflowable component No additional optics Single power supply I2C interface for device control and data Provided with a documented C portable API (Application Programming Interface) Two programmable GPIO Window and thresholding functions for rangingApplications Laser Assisted Auto focus Smartphones/portable touchscreen devices Tablet/laptop/gaming devices Domestic appliances/industrial devicesDescriptionThe VL6180 is the latest product based on ST s patented FlightSense technology. This is a ground-breaking technology allowing absolute distance to be measured independent of target reflectance.

3 Instead of estimating the distance by measuring the amount of light reflected back from the object (which is significantly influenced by color and surface), the VL6180 precisely measures the time the light takes to travel to the nearest object and reflect back to the sensor (Time-of-Flight). Combining an IR emitter and a range sensor in a two-in-one ready-to-use reflowable package, the VL6180 is easy to integrate and saves the end-product maker long and costly optical and mechanical design optimizations. The module is designed for low power operation.

4 Ranging measurements can be automatically performed at user defined intervals. Multiple threshold and interrupt schemes are supported to minimize host operations. Host control and result reading is performed using an I2C interface. Optional additional functions, such as measurement ready and threshold interrupts, are provided by two programmable GPIO pins. A complete API is also associated with the device which consists of a set of C functions controlling the VL6180 to enable fast development of end-user applications. This API is structured in a way that it can be compiled on any kind of platform through a well isolated platform layer (mainly for low level I2C access).

5 Rev 14 Contents1 Overview .. Technical specification .. System block diagram .. Device pinout .. Typical application schematic .. Recommended solder pad dimensions .. Recommended reflow profile ..112 Functional description .. Ranging .. System state diagram .. Timing diagram .. Software .. Operating modes .. Polling mode - single shot measurement .. Interrupt mode - continuous measurement .. Asynchronous mode - single shot measurement .. Range timing .. Range error codes.

6 Range checks .. Early convergence estimate (ECE) .. Range ignore .. Signal-to-noise ratio (SNR) .. Manual/autoVHV calibration .. History buffer .. Wrap Around Filter .. Scaling .. Maximum ranging distance (Dmax) .. Current consumption .. Ranging current consumption .. Current consumption calculator .. Current distribution .. 27 DocID024986 Rev 143 Other system considerations .. Part-to-part range offset .. Cross-talk .. Offset calibration procedure .. Cross-talk calibration procedure.

7 Cross-talk limit .. Cross-talk vs air gap .. 303 Ranging specification .. Proximity ranging (0 to 100mm) .. Max range vs. ambient light level .. Extended range (>100mm) .. Extended range conditions .. Max range vs. ambient light level .. 324I2C control interface .. I2C interface - timing characteristics .. 365 Electrical characteristics .. Absolute maximum ratings .. Normal operating conditions .. Electrical characteristics .. 386 Device registers .. Register encoding formats .. Register descriptions.

8 IDENTIFICATION__MODEL_ID .. IDENTIFICATION__MODEL_REV_MAJOR .. IDENTIFICATION__MODEL_REV_MINOR .. IDENTIFICATION__MODULE_REV_MAJOR .. IDENTIFICATION__MODULE_REV_MINOR .. IDENTIFICATION__DATE_HI .. IDENTIFICATION__DATE_LO .. IDENTIFICATION__TIME .. SYSTEM__MODE_GPIO0 .. SYSTEM__MODE_GPIO1 .. 46 ContentsVL61804/73 DocID024986 Rev SYSTEM__HISTORY_CTRL .. SYSTEM__INTERRUPT_CONFIG_GPIO .. SYSTEM__INTERRUPT_CLEAR .. SYSTEM__FRESH_OUT_OF_RESET .. SYSTEM__GROUPED_PARAMETER_HOLD.

9 SYSRANGE__START .. SYSRANGE__THRESH_HIGH .. SYSRANGE__THRESH_LOW .. SYSRANGE__INTERMEASUREMENT_PERIOD .. SYSRANGE__MAX_CONVERGENCE_TIME .. SYSRANGE__CROSSTALK_COMPENSATION_RATE .. SYSRANGE__CROSSTALK_VALID_HEIGHT .. SYSRANGE__EARLY_CONVERGENCE_ESTIMATE .. SYSRANGE__PART_TO_PART_RANGE_OFFSET .. SYSRANGE__RANGE_IGNORE_VALID_HEIGHT .. SYSRANGE__RANGE_IGNORE_THRESHOLD .. SYSRANGE__MAX_AMBIENT_LEVEL_MULT .. SYSRANGE__RANGE_CHECK_ENABLES .. SYSRANGE__VHV_RECALIBRATE .. SYSRANGE__VHV_REPEAT_RATE.

10 RESULT__RANGE_STATUS .. RESULT__INTERRUPT_STATUS_GPIO .. RESULT__HISTORY_BUFFER_x .. RESULT__RANGE_VAL .. RESULT__RANGE_RAW .. RESULT__RANGE_RETURN_RATE .. RESULT__RANGE_REFERENCE_RATE .. RESULT__RANGE_RETURN_SIGNAL_COUNT .. RESULT__RANGE_REFERENCE_SIGNAL_COUNT .. RESULT__RANGE_RETURN_AMB_COUNT .. RESULT__RANGE_REFERENCE_AMB_COUNT .. RESULT__RANGE_RETURN_CONV_TIME .. RESULT__RANGE_REFERENCE_CONV_TIME .. READOUT__AVERAGING_SAMPLE_PERIOD .. FIRMWARE__BOOTUP .. I2C_SLAVE__DEVICE_ADDRESS.