LIS332AX datasheet(10/14 Pages) STMICROELECTRONICS

tên linh kiện	LIS332AX

Giải thích chi tiết về linh kiện	MEMS inertial sensor: 3-axis ±2 g absolute analog-output ultracompact accelerometer

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Application hints

LIS332AX

10/14

Doc ID 16932 Rev 1

Application hints

Figure 3.

LIS332AX electrical connection

Power supply decoupling capacitors (100 nF ceramic or polyester + 10 µF aluminum) should

be placed as near as possible to the device (common design practice).

The LIS332AX allows band limiting of Voutx, Vouty and Voutz through the use of external

capacitors. The recommended frequency range spans from DC up to 2.0 kHz. Capacitors

must be added at the output pins to implement low-pass filtering for anti-aliasing and noise

reduction. The equation for the cut-off frequency ( ft ) of the external filters is:

Taking into account that the internal filtering resistor (Rout) has a nominal value of 32 kΩ, the

equation for the external filter cut-off frequency may be simplified as follows:

The tolerance of the internal resistor can vary ±20% (typ) from its nominal value of 32 k

Ω;

thus the cut-off frequency will vary accordingly. A minimum capacitance of 2.5 nF for CLOAD

(x, y, z) is required.

π R

out

load xyz

()

⋅⋅

------------------------------------------------------------------------

µF

load xyz

()

--------------------------------------- Hz

[]

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