TLE4997_08 Datasheet, PDF (25/34 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4997
Error Detection
7
Error Detection
Different error cases can be detected by the On-Board-Diagnostics (OBD) and reported
to the microcontroller. The OBD is useful only when the clamping function is enabled. It
is important to set the clamping threshold values inside the error voltage values shown
in Table 13 and Table 14 to ensure that it is possible to distinguish between correct
output voltages and error signals.
7.1
Voltages Outside the Operating Range
The output signals error conditions, if V_DD lies
• inside the ratings specified in Table 2 "Absolute Maximum Ratings" on Page 12
• outside the range specified in Table 3 "Operating Range" on Page 13.
Table 13 Undervoltage and Overvoltage (All values with R_L ≥ 10k)
Parameter
Symbol Limit Values
Unit Notes
min.
max.
Undervoltage threshold V_DDuv 3
4
V
Overvoltage threshold V_DDov 7
8.3
V
Output voltage
V_OUTuv 0.95 x V_DD -
V
@ undervoltage
3V ≤ V_DD ≤ V_DDuv
Output voltage
@ overvoltage
V_OUTov 0.97 x V_DD -
V
V_DDov < V_DD ≤ 16 V
Supply current ¹⁾
I_DDuv -
10
mA @ undervoltage
1) _{For overvoltage and reverse voltage, see Table 2 "Absolute Maximum Ratings" on Page 12.}
7.2
Open Circuit of Supply Lines
In the case of interrupted supply lines, the data acquisition device can alert the user. If
two sensors are placed in parallel, the output of the remaining working sensor may be
still used for an emergency operation.
Table 14 Open Circuit (OBD Parameters) ¹⁾
Parameter
Symbol Limit Values
Unit Notes
min.
max.
Output voltage
@ open V_DD line
V_OUT 0
0.18
V
0.2
Output voltage
V_OUT 4.82
5
V
@ open GND line
4.8
1) _{With VDD = 5 V and RL ≥ 10 kΩ pull-down or RL ≥ 20 kΩ pull-up.}
T_J≤120°C
120°C < T_J ≤ 150°C
T_J≤120°C
120°C < T_J ≤ 150°C
Data Sheet
25
V 2.08, 2008-09