Infineon BGT24LTR11 User Manual page 8

User's guide to BGT24LTR11
XENSIV™ 24 GHz radar MMIC
Table of contents
24180
24170
24160
24150
24140
24130
24120
24110
24100
-40
Figure 9 VCO frequency vs. temperature, VCO controlled by PTAT voltage source. Measured at
random sample.
2.4 Proportional to absolute temperature (PTAT) voltage source
The PTAT voltage source generates a voltage V
temperature of the chip. It is powered separate from VCC via the VCC_PTAT pin (pin 16).
The PTAT voltage source generates a tuning voltage for the VCO in Doppler mode, see section 4.1.
2
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
-40
Figure 10 Voltage generated by PTAT voltage source vs. temperature for a random device.
Application note
VCO Frequency over Temperature controlling with V_Ptat
-20 0
at the V_PTAT pin (pin 15) which is proportional to the
PTAT
V_PTAT over Temperature
-20 0 20
20 40
Temperature [°C]
40 60
Temperature [°C]
8
60 80 100
80 100
Revision 1.50
2023-02-14