Dual-Channel Temperature Monitors and
Fan-Speed Controllers with Thermistor Inputs
_______________________________________________________________________________________ 3
Note 1: 1?/SPAN>C of error corresponds to an ADC error of 7.76mV when V
REF
= 1V.
Note 2: Guaranteed by design and characterization.
Note 3: Production tested.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= 0癈 to +125癈, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25癈.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
START Condition Hold Time
t
HD:STO
10% of SDA to 10% of SCL
4
祍
STOP Condition Setup Time
t
SU:STO
90% of SCL to 10% of SDA
4
祍
Data Setup Time
t
SU:DAT
10% of SDA to 10% of SCL
250
ns
Data Hold Time
t
HD:DAT
10% of SCL to 10% of SDA
300
ns
SMBus Fall Time
t
F
300
ns
SMBus Rise Time
t
R
1000
ns
SMBus Timeout
(Note 3)
29
37
55
ms
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25癈, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
5.0
4.5
4.0
3.5
10
100
1000
1
3.0
5.5
LOCAL
REMOTE
SHUTDOWN
0
40
20
80
60
100
120
THERMISTOR TEMPERATURE DATA
vs. THERMISTOR TEMPERATURE
THERMISTOR TEMPERATURE (癈)
0
40
60
20
80 100 120
LOCAL TEMPERATURE ERROR
vs. DIE TEMPERATURE
DIE TEMPERATURE (癈)
75
50
25
-1
0
1
2
-2
0
100
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