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AN4506 Datasheet(PDF) 18 Page - STMicroelectronics |
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AN4506 Datasheet(HTML) 18 Page - STMicroelectronics |
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18 / 47 page  Digital filters AN4506 18/47 DocID026442 Rev 2 4.2 Low-pass filters The bandwidth of the low-pass filters depends on the selected ODR. The cutoff frequencies (ft) for the low-pass filters are shown in Table 13. 01 x Low-pass-filtered data are used for interrupt generation 11 x High-pass and low-pass-filtered data are used for interrupt generation Table 10. IG_SEL configuration settings HPen IG_Sel1 IG_Sel2 Description Table 11. Low-pass filter cutoff frequency Low_ODR DR [1:0] BW [1:0] ODR [Hz] Cutoff LPF1 [Hz] Cutoff LPF2 [Hz] 1 00 00 12.5 3.9 n.a. 1 00 01 12.5 n.a. 1 00 10 12.5 n.a. 1 00 11 12.5 n.a. 101 00 25 7.8 n.a. 1 01 01 25 n.a. 1 01 10 25 n.a. 1 01 11 25 n.a. 11x 00 50 16 16.6 1 1x 01 50 16.6 1 1x 10 50 16.6 1 1x 11 50 16.6 0 00 00 100 32 12.5 0 00 01 100 25 0 00 10 100 25 0 00 11 100 25 0 01 00 200 63.3 12.5 0 01 01 200 - 0 01 10 200 - 0 01 11 200 70 0 10 00 400 128 20 0 10 01 400 25 0 10 10 400 50 0 10 11 400 110 |
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