Precision SMBus-Compatible Remote/Local
Temperature Sensors with Overtemperature Alarms
4 _______________________________________________________________________________________________________________________________________________________________ _______________
Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25癈, unless otherwise noted.)
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
5.0
4.5
4.0
3.5
2.8
3.2
3.6
4.0
2.4
3.0
5.5
OPERATING SUPPLY CURRENT
vs. CONVERSION RATE
CONVERSION RATE (Hz)
4.00
2.00
1.00
0.50
0.25
0.13
100
200
300
400
500
600
0
0.63
REMOTE TEMPERATURE ERROR
vs. REMOTE-DIODE TEMPERATURE
TEMPERATURE (癈)
100
75
50
25
-1.5
-0.5
0.5
1.5
2.5
-2.5
0
125
T
A
= +85癈
FAIRCHILD 2N3906
LOCAL TEMPERATURE ERROR
vs. DIE TEMPERATURE
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
TEMPERATURE (癈)
100
75
50
25
0
125
REMOTE TEMPERATURE ERROR
vs. 45nm REMOTE DIODE TEMPERATURE
TEMPERATURE (癈)
90
80
70
60
-4
-2
0
2
4
6
-6
50
100
TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
FREQUENCY (Hz)
10k
1k
1
10
100
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
0.1
100k
LOCAL ERROR
REMOTE ERROR
V
IN
= SQUARE WAVE APPLIED TO V
CC
WITH NO 0.1糉 V
CC
CAPACITOR
-1
0
1
2
3
4
5
6
7
8
9
-2
TEMPERATURE ERROR
vs. COMMON-MODE NOISE FREQUENCY
FREQUENCY (Hz)
100k
10k
10
100
1k
1
REMOTE ERROR
LOCAL ERROR
V
IN
= AC-COUPLED TO DXN
V
IN
= 100mV
P-P
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-2.0
TEMPERATURE ERROR
vs. DIFFERENTIAL-MODE NOISE FREQUENCY
FREQUENCY Hz
100k
10k
10
100
1k
1
V
IN
= 20mV
P-P
SQUARE WAVE
APPLIED TO DXP-DXN
TEMPERATURE ERROR
vs. DXP-DXN CAPACITANCE
DXP-DXN CAPACITANCE nF
10.000
1.000
-5
-4
-3
-2
-1
0
1
-6
0.100
100.000