Rainbow Electronics LM63 - Manual (Page 11)

1.0 Functional Description
(Continued)
No-Acknowledge from the Master. Note that the No-
Acknowledge is typically used as a signal for the slave
indicating that the Master has read its last byte.
1.9 DIGITAL FILTER
The LM63 incorporates a user-configured digital filter to
suppress erroneous Remote Temperature readings due to
noise. The filter is accessed in the Remote Diode Tempera-
ture Filter and Comparator Mode Register. The filter can be
set according to the following table.
Level 2 is maximum filtering.
Digital Filter Selection Table
D2 D1 Filter
0 0 No Filter
0 1 Level 1
1 0 Level 1
1 1 Level 2
20057010
FIGURE 6. Step Response of the Digital Filter
20057011
FIGURE 7. Impulse Response of the Digital Filter
20057012
FIGURE 8. Digital Filter Response in an Intel Pentium 4
processor System. The Filter on and off curves were
purposely offset to better show noise performance.
LM63
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