TMF8805 datasheet(64/74 Pages) OSRAM

64 / 74 page

TMF8805

Application information

Datasheet

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DS000692

• v7-00 • 2023-Dec-01

64 / 74

Figure 12: TMF8805 application schematic

The SYNC signal connected to GPIO1 can be used to immediately interrupt the TMF8805

VCSEL operation if the high power illuminator is operating. It needs to be ensured that SYNC

does not exceed the VDD supply of TMF8805 as otherwise an internal protection diode will

start conducting. The VCSEL operation is controlled by setting cmd_data5 of command=0x02

or 0x03 according (see App0 registers). On SYNC assertion, the VCSEL is immediately

switched off (typically after 10 µs), on SYNC de-assertion the VCSEL operation is resumed

within >100 µs.

GPIO0 can be used as a general GPIO output signal.

The signals INT/SDA/SCL need an external pull-up resistor to the VIO supply (typically 1.8 V).

7.3.1

Operating several TMF8805 on a single I²C bus

Several TMF8805 devices can share a single I²C bus if there are dedicated enable (EN)

connections to each of these devices.

TMF8805

VCSEL

Optical

Filter

Reflective

Surface

Background

Light

Internal

Reflection

Optics

SPAD,

TDC and

Histogram

Driver

Control

Data

Process

GPIO1

GPIO0

INT

SDA

SCL

VDDC

GNDC

VDDV

GNDV

VDD

GND

Host

VDD

0.1µF/6V3

VDD

0.1µF/6V3

High

Power

Illuminator

VIO

SYNC

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