VL6180 datasheet(19/73 Pages) STMICROELECTRONICS

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VL6180

Functional description

Figure 12. Asynchronous mode

2.6

Range timing

Figure 13 gives a breakdown of total execution time for a single range measurement.



The pre-calibration phase is fixed (3.2 ms).



The range convergence time is variable and depends on target distance/reflectance

(see Table 7).



The recommended readout averaging period is 4.3 ms. Readout averaging helps to

reduce measurement noise. The recommended setting for

READOUT__AVERAGING_SAMPLE_PERIOD{0x10A}

is 48(c) but is programmable in

the range 0-255. Note however that lower settings will result in increased noise.

API.

Note:

When a target is detected the API returns the actual range convergence time. The

convergence time returned by the API does not include the readout average. Range

convergence and readout averaging must be completed within the specified max

convergence time.

VL6180x_RangeSetMaxConvergenceTime() - sets maximum time to run measurement in

all ranging modes. Range = 1 - 63 ms; measurement aborted when limit reached. Effective

max convergence time depends on the actual convergence time plus readout averaging

sample period setting.

c. Default readout averaging period is calculated as follows: 1300 µs + (48 x 64.5 µs) = 4.3 ms

VL6180 数据表(PDF) 19 Page - STMicroelectronics