TLE4998S3C Datasheet, PDF (16/36 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998S3C
Signal Processing
6
Signal Processing
The signal flow diagram in Figure 5 shows the signal path and data-processing
algorithm.
Hall
Sensor
Range LP
A
D
Te m p e ra tu re
Sensor
TC ₂
A
D
+
X
X
1+
-T₀
TC 1
X
Te m p e ra tu re
C o m p e n sa ti o n
Gain
Limiter
( C lam p)
X+
X
Protocol
Generation
out
Offset
Stored in
EEPROM
Memory
Figure 5 Signal Processing Flow
Magnetic Field Path
• The analog output signal of the chopped Hall-effect cell is converted to a digital signal
in the continuous-time A/D converter. The range of the chopped A/D converter can be
set in several steps (see Table 6). This gives a suitable level for the A/D converter
• After the A/D conversion, a digital low-pass filter reduces the bandwidth (Table 10)
• A multiplier amplifies the value depending on the gain (see Table 8) and temperature
compensation settings
• The offset value is added (see Table 9)
• A limiter reduces the resulting signal to 16 bits (see Chapter 11) and feeds the
Protocol Generation stage
Temperature Compensation
(Details are listed in Chapter 8)
• The output signal of the temperature cell is also A/D converted
Data Sheet
16
Rev 1.1, 2009-09