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E-LIS3L02AS4 Datenblatt(PDF) 7 Page - STMicroelectronics |
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E-LIS3L02AS4 Datenblatt(HTML) 7 Page - STMicroelectronics |
7 / 14 page 7/14 LIS3L02AS4 5 Application Hints Figure 4. LIS3L02AS4 Electrical Connection Power supply decoupling capacitors (100nF ceramic + 10 µF Al) should be placed as near as possible to the device (common design practice). The LIS3L02AS4 allows to band limit Voutx, Vouty and Voutz through the use of external capacitors. The re-commended frequency range spans from DC up to 1.5 KHz. In particular, capacitors must be added at output pins to implement low-pass filtering for antialiasing and noise reduction. The equation for the cut- off frequency ( ) of the external filters is: Taking in account that the internal filtering resistor (Rout) has a nominal value equal to , the equa- tion for the external filter cut-off frequency may be simplified as follows: The tolerance of the internal resistor can vary typically of ±20% within its nominal value of 110k Ω; thus the cut-off frequency will vary accordingly. A minimum capacitance of 320 pF for Cload(x, y, z) is required in any case. Vout Z 100nF Cload z LIS3L02AS4 10 µF Vdd Vout X GND ST GND GND Cload x Cload y (top view) Optional Optional Vout Y Optional PD Digital signals DIRECTION OF THE DETECTABLE ACCELERATIONS FS Y 1 13 Z X GND f t f t 1 2 π R out C load xyz ,, () ⋅⋅ ------------------------------------------------------------------------ = 110k Ω f t 1.45 µF C load xy z ,, () -------------------------------------- Hz [] = |
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Ähnliche Beschreibung - E-LIS3L02AS4 |
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