TLE5011 Datasheet, PDF (39/43 Pages) Infineon Technologies AG – GMR Angle Sensor

TLE5011
Specification
3.11
Overvoltage Comparators
Various comparators monitor the voltage in order to ensure error-free operation.
The overvoltages must be active for at least t_DEL to set the test comparator bits in the SSC interface registers. This
works as digital spike suppression.
Table 18 Test Comparators
Parameter
Symbol Limit Values
Unit Notes
min. typ. max.
Overvoltage Detection V_OVG
-
V_OVA
-
V_OVD
-
V_DD Overvoltage
V_DDOV
-
GND - off Voltage
V_GNDoff
-
V_DD - off Voltage
V_VDDoff
-
Spike filter Delay
t_DEL
-
2.80 -
2.80 -
2.80 -
6.5 -
0.54 -
0.48 -
10
-
V
V
V
V
V
V_GNDoff = V_GND - V_TST1
V
V_VDDoff = V_CLK - V_DD
or V_SCK - V_DD
µs
The error condition has to last longer
than this value
(min. 256 clocks of f_DIG)
3.11.1 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. It sets the VRx_OV bit.
.
V_DDA
REF
-
V_DD
V_RG
V_RA
+
V_RD
10µs
Spike
Filter
xxx_OV
Figure 19 OV Comparator
GND
GND
3.11.2 V_DD Overvoltage Detection
The Overvoltage Detection Comparator monitors the external supply voltage at the V_DD pin. It activates the
STAT_VR (see Figure 19).
3.11.3 GND-off Comparator
The GND-off Comparator is used to detect a voltage difference between the GND pin and TST1 (which must be
soldered to GND in the application). It activates the STAT_VR bit. This circuit can detect a disconnection of the
Supply GND Pin.
Final Data Sheet
39
V1.1, 2010-05