Long distance ranging Time-of-Flight sensor expansion board
based on VL53L1X for STM32 Nucleo
The X-NUCLEO-53L1A1 is an expansion board
for the NUCLEO-F401RE and NUCLEO-L476RG
development boards. It provides a complete
evaluation kit allowing anyone to learn, evaluate,
and develop their applications using the VL53L1X
ToF, long-distance ranging sensor technology.
The X-NUCLEO-53L1A1 expansion board is
delivered with a cover glass holder in which three
different spacers of 0.25, 0.5 and 1 mm height
can be fitted below the cover glass to simulate
various air gaps.
Two VL53L1X breakout boards can be connected
using two 10-pin connectors.
The X-NUCLEO-53L1A1 expansion board is
Features compatible with the STM32 nucleo board family,
and with the Arduino UNO R3 connector layout.
• VL53L1X Time-of-Flight (ToF), long-distance Several ST expansion boards can be superposed
ranging sensor module through the Arduino connectors which allows, for
• Accurate absolute ranging distance, example, the development of VL53L1X
independent of the reflectance of the target applications with Bluetooth or Wi-Fi interfaces.
• 0.25, 0.5 and 1 mm spacers to simulate air Table 1. Device summary
• Two different cover windows Order code Description
• Two VL53L1X breakout boards X-NUCLEO-53L1A1 Expansion board for STM32
• Compatible with STM32 Nucleo board family nucleo board family
• Equipped with ArduinoTM UNO R3 connector
• RoHS compliant
• Full system SW is supplied, including code
examples and graphical user interface. All this
can be downloaded from the folder “TOOLS
AND SOFTWARE, section Ecosystems” on
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For further information contact your local STMicroelectronics sales office. www.st.com
Block diagram X-NUCLEO-53L1A1
1 Block diagram
Figure 1 describes the X-NUCLEO-53L1A1 expansion board features.
Figure 1. X-NUCLEO-53L1A1 circuit diagram
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X-NUCLEO-53L1A1 Optional VL53L1X breakout boards
2 Optional VL53L1X breakout boards
The VL53L1X breakout boards can be directly plugged onto the VL53L1X expansion board
through two 10-pin connectors or they can be connected to the board through flying leads.
When connected through flying leads, developers should break off the mini PCB from the
breakout board, and use only the “VL53L1X mini PCB” which is smaller and integrates more
easily into customers devices.
Figure 2. Connections of VL53L1X breakout boards
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Laser considerations X-NUCLEO-53L1A1
3 Laser considerations
The VL53L1X contains a laser emitter and corresponding drive circuitry. The laser output is
designed to remain within Class 1 laser safety limits under all reasonably foreseeable
conditions including single faults in compliance with IEC 60825-1:2014 Edition 3. The laser
output remains within Class 1 limits as long as STMicroelectronic’s recommended device
settings are used and the operating conditions specified in the datasheet are respected. The
laser output power must not be increased by any means and no optics should be used with
the intention of focusing the laser beam.
Figure 3. Class 1 laser product label
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
5 Revision history
Table 2. Document revision history
Date Revision Changes
02-Feb-2018 1 Initial release
Replaced cover image
20-Feb-2018 2 Replaced “satellite boards” with “breakout boards”
Updated title of Figure 1: X-NUCLEO-53L1A1 circuit
Replaced Figure 2: Connections of VL53L1X breakout
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