TLE4998S3_V01 datasheet(21/39 Pages) INFINEON

部件名	TLE4998S3

功能描述	Programmable Linear Hall Sensor

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制造商	INFINEON [Infineon Technologies AG]

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TLE4998S

Signal Processing

Data Sheet

21

V 1.0, 2008-07

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.

Note: In range 7 (filter off), the output noise increases.

Table 11

Low Pass Filter Setting

Note: Parameter LP

Cutoff frequency in Hz (-3dB point)1)

1) As this is a digital filter running with an RC-based oscillator, the cutoff frequency may vary within ±20%

0

80

1

240

2

440

3

640

4

860

5

1100

6

1390

7

off

Table 12

Low-Pass Filter

Parameter

Symbol Limit Values

Unit

Notes

min.

max.

Register size

LP

3

bit

Corner frequency

variation

Δ f

- 20

+ 20

%

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