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TMF8801

Functional Description

Datasheet

• PUBLIC

DS000648

• v10-00 • 2022-Dec-20

│ 18

7.6.2

Algorithm Timings

The TMF8801 can adjust the number of iterations and detection threshold using registers. A default

mode is defined having 900 k iterations and threshold=0.

Figure 18:

Algorithm Timings

Parameter

Condition

Min

Nom

Max

Units

Default mode

command=0x02 or 0x03

cmd_data6=0xA3,

cmd_data3=0x00,

cmd_data1=0x03,

cmd_data0=0x84 (900 k iterations)

7.6.3

Algorithm Performance Parameters

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

Using the timings described in 7.6.2 following performance is achieved:

Figure 19:

Object Detection Algorithm Parameters

Parameter

Condition

Min

Nom

Max

Units

Reflectivity of object

at 940 nm

Perpendicular to TMF8801

Maximum distance

detection,

1.5 m x 1.5 m object

350 lux fluorescent on object, 18%

grey card

2500(1)

360 lux halogen light on object(2),

88% white card

2500(1)

360 lux halogen light on object(2),

18% grey card

1700

1400 lux halogen light on object(3),

88% white card

1500

1400 lux halogen light on object(4),

18% grey card

1250

14000 lux halogen light on object(4),

18% grey card

550

Minimum distance

detection, 18 % grey

card, 20 cm x 26 cm

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