VL6180 datasheet(25/73 Pages) STMICROELECTRONICS

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VL6180

Functional description

Note:

With a scaling factor of 2/3. the reported range minimum resolution also increases to

2/3mm.

VL6180x_UpscaleSetScaling() is a single API function which allows the user to change the

scaling factor of the device. VL6180x_UpscaleGetScaling() can be used to read the

scaling factor.

Scaling factor = 1 = proximity ranging (up to ~20 cm)

Scaling factor = 1 = proximity ranging (up to ~40 cm)

Scaling factor = 3 = extended ranging (up to ~60 cm)

2.13

Maximum ranging distance (Dmax)

A target placed in front of the VL6180 device may not be detected because it is too far away

for the given ambient light conditions.

When ambient light level increases, max detection range (Dmax) decreases

When no target is detected (no valid distance), the VL6180 API is able to estimate Dmax as

the maximum distance up to which a 17% target would have been detected with the current

ambient light level.

When no target is detected by the VL6180, the application can interpret the Dmax value as

no target is detected and there is no 17% (or above) target between 0 and Dmax mm.

DMAX is enabled/disabled by VL6180x_DMaxSetState() and read with

VL6180x_DMaxGetState().

Note:

Dmax is estimated for a 17% reflectance target. If the real target has a lower reflectance,

then the Dmax calculated by the API could be overestimated.

2.14

Current consumption

Table 10. gives an overview of current consumption in different operating states.

2.14.1

Ranging current consumption

Figure 16 shows typical ranging current consumption of the VL6180. Current consumption

depends on target distance, target reflectance and sampling rate. The example shown here

is based on default settings and a sampling rate of 10 Hz. The average current consumption

for a 17% reflective target at 50 mm operating at 10 Hz is 1.7 mA. At different sampling rates

the current consumption scales accordingly i.e. the average current consumption at 1 Hz

under the same conditions would be 0.17 mA.

Table 10. Typical current consumption in different operating states

Mode

Current

Conditions

Hardware standby

< 1

A

Shutdown (GPIO0 = 0). No I2C comms

Software standby

< 1

A

After MCU boot. Device ready

Ranging

1.7 mA

Average consumption during ranging(1)

1. 10 Hz sampling rate, 17% reflective target at 50 mm.

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