IC-LO Datasheet, PDF (11/21 Pages) IC-Haus GmbH – TRIANGULATION SENSOR

iC-LO
TRIANGULATION SENSOR
MEASURING SEQUENCE
preliminary
Rev A1, Page 11/21
In order to determine whether the distance between
an object and the sensor falls below a defined value,
iC-LO initiates a light pulse that is then diffuse reflected
and pictured onto the photodiode array. The spot of
light diffuse reflected by the object moves along the
diode array depending on the distance object to sen-
sor. After the light pulse has been transmitted, at a
defined point in time the signal from the photodiode ar-
ray is evaluated and decided whether the distance be-
tween the object and sensor has fallen below a defined
value or not.
LED DRIVER
iC-LO can drive a transmitting LED directly or trigger
an external driver using the CMOS level output. A low-
side driver is integrated to drive the LED and can sup-
ply diode currents of up to approx. 1 A with an external
back-up capacitor.
The type of output at pin LED (lowside driver or CMOS
output) is set by parameter LCO.
LCO
Addr. 0x07; bit 4
RW
Code
Description
0x0
CMOS output at pin LED
0x1
Low-side driver at pin LED
Table 5: Configuration LED output type
Starting with chip version iC-LO revision Y the follow-
ing applies:
LCO
Addr. 0x07; bit 5
RW
Code
Description
0x0
CMOS output at pin LED
0x1
Low-side driver at pin LED
Table 6: Configuration LED output type
Starting with chip version iC-LO revision Y the follow-
ing applies:
LCC
Addr. 0x07; bit 4:0
RW
Code
Description
0x0
112 mA
0x1
126 mA
...
0x7
210 mA
0x8
193 mA
0x9
221 mA
...
0xF
389 mA
0x10
368 mA
0x11
423 mA
...
0x17
753 mA
0x18
696 mA
0x19
796 mA
...
0x1F
1396 mA
Table 8: Current in LED (low-side driver)
The parameter LCC configures the LED current.
LCC
Addr. 0x07; bit 3:0
RW
Code
Description
0x0
94 mA
0x1
110 mA
...
0x7
206 mA
0x8
470 mA
0x9
550 mA
...
0xF
1030 mA
Table 7: Current in LED (low-side driver)
The frequency of the light pulses in multiple measure-
ment mode (see Table 18) and the duration of a light
pulse is set by parameters PER and PW.
PER
Addr. 0x08; bit 5:4
RW
Code
Description
0x0
reserved
0x1
13.9 kHz
0x2
10.4 kHz
0x3
5 kHz
Table 9: Pulse Frequency