TLE4998C3 datasheet(21/44 Pages) INFINEON

부품명	TLE4998C3

상세설명	Programmable Linear Hall Sensor

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제조업체	INFINEON [Infineon Technologies AG]

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TLE4998C

Signal Processing

Data Sheet

Rev 1.0, 2008-12

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%

240

440

640

860

1100

1390

off

Table 12

Low-Pass Filter

Parameter

Symbol Limit Values

Unit

Notes

min.

max.

bit

Corner frequency

variation

∆ f

- 20

+ 20

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