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LM40 Datasheet(Fiches technique) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numéro de pièce LM40
Description  Hardware Monitor with Dual Thermal Diodes and SensorPath Bus
Télécharger  27 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM40 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limits)
Diode Source Current
(V
D+ −VD−) = +0.65 V; High Current
188
280
µA (max)
Low Current
11.75
µA
Diode Source Current High Current to Low Current
Ratio
16
ANALOG TO DIGITAL CONVERTER CHARACTERISTICS
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limit)
TUE
Total Unadjusted Error(Note 11)
±2
%FS
(max)
Resolution
9
Bits
DNL
Differential Non-linearity
1
LSB
Power Supply Sensitivity
±1
%/V
Input Resistance, all analog inputs (total resistance
of divider chain)
210
140
k
Ω (min)
400
k
Ω (max)
SWD and ADD DIGITAL INPUT CHARACTERISTICS
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limit)
V
IH
SWD Logical High Input Voltage
2.1
V (min)
V+ + 0.5
V (max)
V
IL
SWD Logical Low Input Voltage
0.8
V (max)
-0.5
V (min)
V
IH
ADD Logical High Input Voltage
90%xV+
V (min)
V
IL
ADD Logical Low Input Voltage
10%xV+
V (max)
V
HYST
Input Hysteresis
300
mV
I
L
SWD and ADD Input Current
GND
≤ V
IN
≤ V+
±0.005
±10
µA (max)
SWD Input Current with V+ Open or
Grounded
GND
≤ V
IN
≤ 3.6V,
and V+ Open or
GND
±0.005
µA
C
IN
Digital Input Capacitance
10
pF
SWD DIGITAL OUTPUT CHARACTERISTICS
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limit)
V
OL
Open-drain Output Logic “Low”
Voltage
I
OL = 4mA
0.4
V (max)
I
OL = 50µA
0.2
V (max)
I
OH
Open-drain Output Off Current
±0.005
±10
µA (max)
C
OUT
Digital Output Capacitance
10
pF
AC Electrical Characteristics
The following specification apply for V+ = +3.0 V
DC to +3.6 VDC, unless otherwise specified. Boldface limits apply for
T
A =TJ =TMIN=0˚C to TMAX=85˚C; all other limits TA =TJ = 25˚C. The SensorPath Characteristics conform to the SensorPath
specification revision 0.98. Please refer to that speciation for further details.
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limits)
HARDWARE MONITOR CHARACTERISTICS
t
CONV
Total Monitoring Cycle Time (Note 13)
All Voltage and
Temperature readings
(Default)
182
163.8
ms (min)
200.2
ms (max)
SensorPath Bus CHARACTERISTICS
t
f
SWD fall time (Note 16)
R
pull-up=1.25 k
±30%,
C
L=400 pF
300
ns (max)
www.national.com
5


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