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LM64 Datasheet(PDF) 17 Page - Texas Instruments

Part # LM64
Description  LM64 ±1°C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIOs
PDF  42 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM64 Datasheet(HTML) 17 Page - Texas Instruments

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Level 2 is maximum filtering.
Table 6-3. Digital Filter
Selection Table
D2
D1
Filter
0
0
No Filter
0
1
Level 1
1
0
Level 1
1
1
Level 2
0
5
10
15
20
25
25
30
35
40
45
50
NUMBER OF SAMPLES
No Filter
Filter Level 1
Filter Level 2
Figure 6-5. Step Response of the Digital Filter
0
5
10
15
20
25
25
30
35
40
45
50
NUMBER OF SAMPLES
No Filter
Filter Level 1
Filter Level 2
Figure 6-6. Impulse Response of the Digital Filter
25
27
29
31
33
35
37
39
41
43
45
0
50
100
150
200
SAMPLE NUMBER
LM64
with
Filter On
LM64
with
Filter Off
The Filter on and off curves were purposely offset to better show noise performance.
Figure 6-7. Digital Filter Response in an Intel Pentium 4 processor System
6.3.10 Fault Queue
The LM64 incorporates a Fault Queue to suppress erroneous ALERT triggering . The Fault Queue prevents
false triggering by requiring three consecutive out-of-limit HIGH, LOW, or T_CRIT temperature readings. See
Figure 6-8. The Fault Queue defaults to OFF upon power-up and may be activated by setting the RDTS Fault
Queue bit in the Configuration Register to a 1.
www.ti.com
LM64
SNAS207B – MAY 2004 – REVISED JANUARY 2024
Copyright © 2024 Texas Instruments Incorporated
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Product Folder Links: LM64



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