TMF8701-1XM datasheet(51/66 Pages) OSRAM

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[v2-00] 2023-Feb-21

TMF8701 − Application Information

Schematic

The TMF8701 needs only 3 small 0402 external capacitors for

operation:

Figure 116:

TMF8701 Application Schematic

The SYNC signal connected to GPIO1 can be used to

immediately interrupt the TMF8701 VCSEL operation if the high

power illuminator is operating. It needs to be ensured that SYNC

does not exceed the VDD supply of TMF8701 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 –

appid=0xC0 registers). On SYNC assertion, the VCSEL is

immediately switched off (typically after 10μs), on SYNC

de-assertion the VCSEL operation is resumed within >100μs.

GPIO0 can be used as a general GPIO output signal.

The signals INT/SDA/SCL need an external pullup resistor to the

VIO supply (typically 1.8V).

TMF8701

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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