tle4997i Infineon Technologies Corporation, tle4997i Datasheet - Page 15

• Manufacturer Part Number: tle4997i
• Description: Programmable Linear Hall Sensor For Industrial Use
• Manufacturer: Infineon Technologies Corporation

6
The flow diagram in
Figure 5
Magnetic Field Path
• The analog output signal of the chopped Hall cell is converted in the continuous-time
• After the A / D conversion a digital low pass filter reduces the band width
• A multiplier amplifies the value according the gain setting (see
• The offset value is added (see
• A limiter reduces the resulting signal to 12 bits and feeds the D / A converter.
Temperature compensation
(Details are listed in
• The output signal of the temperature cell is also A / D converted.
• The temperature is normalized by subtraction of the T
• The linear path is multiplied with the TC
Preliminary Data Sheet
A/D converter. The range of the chopped ADC can bet set in several steps (see
Table
temperature compensation.
quadratic function).
Temperature
-T
A
Sensor
D
0
6). This gives a suitable level for the A/D converter.
Signal Processing
+
Signal Processing Flow
Compensation
Temperature
Sensor
TC
Figure 5
Hall
Chapter
X
TC
2
1
1
8)
shows the data processing algorithm.
X
X
Range
A
Table
D
+
Gain
9)
1
15
LP
value.
EEPROM
Stored in
Memory
X
Offset
X
+
0
Limiter
value (zero point of the
(Clamp)
Signal Processing
LP
DAC
V 1.01, 2006-09
Table
(Table
TLE4997I
D
A
8) plus
out
10).