TLE5012 Datasheet, PDF (53/57 Pages) Infineon Technologies AG – GMR-Based Angular Sensor for Rotor Position Sensing

TLE5012
Specification
3.7
Overvoltage Comparators
Various comparators monitor the voltage in order to ensure error free operation. The overvoltages must be active
at least 256 periods of t_DIG to set the test comparator bits in the SSC Interface registers. This works as digital spike
suppression.
Table 19 Test Comparators
Parameter
Symbol
Overvoltage Detection
V_DD Overvoltage
V_DD Undervoltage
GND - Off Voltage
V_DD - Off Voltage
Spike Filter Delay
V_OVG
V_OVA
V_OVD
V_DDOV
V_DDUV
V_GNDoff
V_VDDoff
t_DEL
Min.
-
-
-
-
-
-
-
-
Values
Typ. Max.
2.80 -
2.80 -
2.80 -
6.05 -
2.70 -
-0.55 -
0.55 -
10 -
Unit Note / Test Condition
V
V
V
V
V
V
V
µs
3.7.1 Internal Supply Voltage Comparators
Every voltage regulator has an overvoltage comparator to detect a malfunction. If the nominal output voltage of
2.5 V is larger than V_OVG, V_OVA and V_OVD, then this overvoltage comparator is activated.
REF
VDD
VRG
V_RA
V_RD
Figure 27 OV Comparator
V_DDA
-
+
GND
GND
10µs
Spike
Filter
xxx_OV
3.7.2
V_DD Overvoltage Detection
The Overvoltage Detection Comparator monitors the external supply voltage at the V_DD pin. It activates the S_VR
bit.(Figure 27)
3.7.3 GND - Off Comparator
The GND - Off Comparator is used to detect a voltage difference between the GND pin and SCK. It activates the
S_VR bit of the SSC - Interface. This circuit can detect a disconnection of the Supply GND Pin.
Target Data Sheet
53
V 0.46, 2009-09