Qs3 - Detector Hold Time - Infineon XENSIV BGT60LTR11AIP Manual

XENSIV™ BGT60LTR11AIP Radar Shield2Go
Super low-power 60 GHz Doppler radar sensor with antennas-in-package
Radar modes setup
Pad
8*V /16 – 9*V /16
DD DD
9*V /16 – 10*V /16
DD DD
10*V /16 – 11*V /16
DD DD
11*V /16 – 12*V /16
DD DD
12*V /16 – 13*V /16
DD DD
13*V /16 – 14*V /16
DD DD
14*V /16 – 15*V /16
DD DD
15*V /16 – 16*V /16
DD DD
Due to mechanical tolerances and manufacturing differences in the potentiometer, it is difficult to predict the
degree of rotation of the potentiometer. Table 5 gives an orientation for the configuration of the threshold,
hence the radar's range. Please note that your values may differ slightly from the values below.
Measured threshold vs. range of Radar Shield2Go in advanced autonomous mode (for
reference only)
Measured potentiometer
voltage "VDD_RF-QS2" (V1)
1.412 V
1.378 V
1.296 V
1.144 V
0.929 V
0.794 V
0.665 V
0.577 V
0.388 V
0.229 V
0.108 V
0 V
4.2.5 QS3 – detector hold time
V1
Figure 15 Rotation direction of R_QS3 potentiometer – detector hold time
Application Note
Detector threshold
320
384
480
640
896
1344
1920
2560 (right endpoint of potentiometer)
Measured
potentiometer voltage
"GND-QS2" (V2)
0.173 V
0.207 V
0.289 V
0.441 V
0.656 V
0.791 V
0.92 V
1.008 V
1.197 V
1.357 V
1.477 V
1.585 V
Rotate the knob of potentiometer R_QS3 clockwise to increase the voltage
and hence the detection hold time. Rotate it counterclockwise to reduce the
Note: V1 is the potential between the potentiometer's terminals
page 18 of 32
Expected detector
range
7.66 m
6.9 m
5.8 m
5.4 m
4.76 m
4.1 m
2.48 m
2.1 m
1.7 m
1.2 m
0.93 m
0.45 m
detection hold time.
(GND and QS2).
Comment
Leftmost position
Rightmost position
V1.0
2022-12-15