TMF8801 datasheet(62/73 Pages) OSRAM

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TMF8801

Application Information

Datasheet

• PUBLIC

DS000648

• v10-00 • 2022-Dec-20

│ 61

9.3

Schematic

The TMF8801 needs only 3 small 0402 external capacitors for operation:

Figure 120:

TMF8801 Application Schematic

The SYNC signal connected to GPIO1 can be used to immediately interrupt the TMF8801 VCSEL

operation if the high power illuminator is operating. It needs to be ensured that SYNC does not exceed

the VDD supply of TMF8801 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 pullup resistor to the VIO supply (typically 1.8 V).

TMF8801

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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