TMF8801 datasheet(60/73 Pages) OSRAM

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TMF8801

Application Information

Datasheet

• PUBLIC

DS000648

• v10-00 • 2022-Dec-20

│ 59

Application Information

9.1

SPAD Options

9.1.1

Signal SPADs

Firmware can enable/disable SPADs in the array as needed.

Figure 117:

Signal SPADs

Min

Nom

Max

Comment

1x SPADS

10x Attenuated SPADs

100x Attenuated SPADs

Physically there are 4x32=128 signal SPADs, but SPADs with too high dark count rate are disabled

during production test. There are four TDCs (TDC1…TDC4) connected to the output of the SPADs.

Each of the TDCs is connected to an array of 32 SPADs (SPADs with too high dark count rate are

disabled). In distance mode the number of SPADs are reduced to typ. 40 SPADs to limit the FOV of

the TMF8801.

9.1.2

Reference SPADs

Figure 118:

Reference SPADs

Min

Nom

Max

Comment

100x Attenuated SPADs

Due to the high light intensity form the VCSEL which is located very close to the reference SPADs and

has no optical barrier like the signal SPADs only highly attenuated SPADs are used. Physically there

are 12 reference SPADs, but SPADs with too high dark count rate are disabled during production test.

There is one TDC (TDC0) connected to the output of the SPADs.

TMF8801 Datasheet(PDF) 60 Page - OSRAM GmbH