TLE4998S3C Datasheet, PDF (19/36 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998S3C
Signal Processing
6.4
DSP Input Low-Pass Filter
A digital low-pass filter is placed between the Hall A/D converter and the DSP, and can
be used to reduce the noise level. The low-pass filter has a constant DC amplification of
0 dB (Gain of 1), which means that its setting has no influence on the internal Hall ADC
value.
The bandwidth can be set to any of 8 values.
Table 10 Low Pass Filter Setting
Note: Parameter LP
Cutoff frequency in Hz (-3dB point)¹⁾
0
80
1
240
2
440
3
640
4
860
5
1100
6
1390
7
off
1) _{As this is a digital filter running with an RC-based oscillator, the cutoff frequency may vary within ±20%}
Table 11 Low-Pass Filter
Parameter
Symbol Limit Values Unit Notes
min. max.
Register size
LP
3
bit
Corner frequency
∆f
- 20 + 20 %
variation
Note: In range 7 (filter off), the output noise increases.
Data Sheet
19
Rev 1.1, 2009-09