LISY300AL

Application hints

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Application hints

Figure 3.

LISY300AL electrical connections and external components values

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 LISY300AL allows to band limit the output rate response through the use of two first-

order on-chip filters: a switched capacitor low-pass filter, with 400Hz -3dB bandwidth, in

CACT pin #5 and ANALOG OUTPUT pin #6), by the formula:

select the signal bandwidth. The sensed frequency range spans from DC up to the selected

bandwidth.

In order to further reduce high-frequency noise, the LISY300AL supports an additional

given by the formula:

100 nF

9.5kOhm

450nF

9nF

0.4nF

VDD

1

7

2

3

4

5

6

8

9 10 11 12 13 14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

GND

GND

GND

LISY300AL

(top view)

C2

R1

C1

GND

10 µF

GND

Optional

Low-pass filter

Digital signals

+Ω

z

f

tA

1

2

π R

ACT

C

ACT

⋅⋅

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

=

f

1

2

π R

OPT

C

OPT

⋅⋅

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

=