AMS TMF8821-SHIELD User manual

Quick Start Guide
QG001019
TMF8821-SHIELD
Quick Start Guide
v1-00 •2022-Feb-02

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Content Guide
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Content Guide
1Out of the Box................................ 3
2Software Installation ..................... 4
3Hardware Overview....................... 5
4Schematic ...................................... 7
5Bill of Materials.............................. 8
6Layout ............................................ 9
7Cover Glass Drawing...................11

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TMF8821-SHIELD ●
Out of the Box
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1 Out of the Box
The TMF8821-SHIELD board is an Arduino UNO form factor development platform for quick
evaluation of the TMF8821 multi-zone dToF sensor.
Featuring a small (20 mm x 12 mm) sensor breakaway board, this kit can be easily integrated into
custom, prototype hardware.
Several cover glass and air gap spacers are provided, this helps to evaluate the system for optimal
optical performance.
Figure 1:
TMF8821-SHIELD With and Without Air Gap Spacer & Cover Glass
No.
Item
Description
1
TMF8821-SHIELD
Main PCB with TMF8821 sensor breakaway board
2
x4 Cover Glass
0.5 mm / 0.6 mm / 0.7 mm / 0.8 mm - thickness
3
x4 Air gap spacers
0.17 mm / 0.25 mm / 0.38 mm / 0.5 mm - thickness
4
2 screws
Screws for securing cover glass to PCB
5
Screwdriver
Screwdriver for securing screws

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Software Installation
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2 Software Installation
The TMF8821-SHIELD is designed to operate with a variety of MCU hardware platforms.
A Software Development Kit (SDK) for the TMF8821 has been developed to run on the NXP
LPC55S69-EVK.
SDK source code examples include:
●Sensor calibration
●Simple configuration (9 zone distance reporting)
●Histogram output (9 zone configuration and 128bin reporting)
●Custom SPAD maps (reconfigure device to 4x4 mode)
LPC55S69 SDK download LINK
Please download the latest revision of the SDK, TMF8821_Driver_SDK_Source_vx.xx.zip from
ams.com and refer to TMF8821_Software_Development_Kit_Getting_Started_Guide.pdf for
installation and operations details.

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TMF8821-SHIELD ●
Hardware Overview
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3 Hardware Overview
The TMF8821-SHIELD board is an Arduino UNO form factor development platform for quick
evaluation of the TMF8821 multi-zone dToF sensor.
Featuring a small sensor breakaway board, this EVM can be integrated into custom, prototype
hardware. The EVM includes an I2C level shifter and supply voltage regulator to allow the EVM to be
used with input voltages up to 5 V.
4 cover glass and air gap spacers are provided, to enabling evaluation of the optical performance.
Key features
●Arduino UNO form factor development board
●TMF8821 sensor mounted on breakaway board
●Cover glass samples included, 0.5 mm / 0.6 mm / 0.7 mm / 0.8 mm - thicknesses
●Air gap spacer samples included, 0.17 mm / 0.25 mm / 0.38 mm / 0.5 mm - thicknesses
●Breakaway board Vdd current sense test point
●Reset button
●Onboard LDO and I2C level shifter
Figure 2:
TMF8821-SHIELD Hardware Overview

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Hardware Overview
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Attention
Please check latest TMF8821 datasheet for maximum supply and IO voltages. Failure to adhere to
these voltage levels may result in permanent damage to the TMF8821-SHIELD.

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TMF8821-SHIELD ●
Schematic
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4 Schematic
Figure 3:
TMF8821-SHIELD Schematic

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Bill of Materials
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5 Bill of Materials
Figure 4:
Bill of Materials

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Layout
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6 Layout
Figure 5:
Layer 1(1)
(1) Full layout details can be found in TMF882x_AD001003_1-00.pdf.

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Layout
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Figure 6:
Layer 4(1)
(1) Full layout details can be found in TMF882x_AD001003_1-00.pdf.

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TMF8821-SHIELD ●
Cover Glass Drawing
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7 Cover Glass Drawing
Figure 7:
Cover Glass Mechanical Drawing
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