TMF8805 datasheet(19/74 Pages) OSRAM

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TMF8805

Functional description

Datasheet

• PUBLIC • Document Feedback

DS000692

• v7-00 • 2023-Dec-01

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5.6.3

Algorithm performance parameters

The algorithm reports distance information of the closest object in 1 mm steps.

Using the timings described in 5.6.2 following performance is achieved:

Table 11: Object detection algorithm parameters

Parameter

Condition

Min

Nom

Max

Units

Reflectivity of

object at 940 nm

Perpendicular to TMF8805

Maximum

distance

detection, 1.5 m

x 1.5 m object

350 lux fluorescent on object, 18% grey or 90% white

card

2500(1)

170 lux halogen light on object(2), 90% white card

2400(1)

170 lux halogen light on object(2), 18% grey card

1900

170 lux halogen light on object(2), 18% grey card,

smudge on glass(3)

1500

830 lux halogen light on object(4), 18% grey card

1100

Minimum

distance

detection, 18 %

grey card, 20 cm

x 26 cm

Accuracy

Object distance

≥ 200 mm

±5

100 mm

≤ object distance <200 mm

±10

20 mm

≤ object distance <100 mm

±15

Transition short

to long distance

mode

200

(1) To achieve the full distance, the oscillator need to be tuned to 4.7 MHz. Use ams OSRAM reference code to implement clock

frequency tuning.

Any target reported above 2500 mm should be considered as no object.

(2) 170 lux halogen light represents 1k lux sunlight equivalent; light on object only.

(3) Smudge on glass is defined by one layer of Scotch Magic Tape 810 (very diffuse).

(4) 830 lux halogen light represents 5 k lux sunlight equivalent; light on object only.

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