Owner manual

MAX6642
±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.01 0.1 1 10 100
STANDBY SUPPLY CURRENT
vs. CLOCK FREQUENCY
MAX6642 toc01
CLOCK FREQUENCY (kHz)
SUPPLY CURRENT (µA)
-4
-2
-3
0
-1
1
2
REMOTE TEMPERATURE ERROR
vs. REMOTE-DIODE TEMPERATURE
MAX6642 toc02
TEMPERATURE (°C)
TEMPERATURE ERROR (°C)
0507525 100 125
2N3906
-3
-1
-2
1
0
2
3
0125
LOCAL TEMPERATURE ERROR
vs. DIE TEMPERATURE
MAX 6642 toc03
TEMPERATURE (°C)
TEMPERATURE ERROR (°C)
5025 75 100
-1.5
-0.5
-1.0
0.5
0
1.5
1.0
2.0
0.0001 0.01 0.10.001 1 10 100
TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
MAX6642 toc04
FREQUENCY (kHz)
TEMPERATURE ERROR (°C)
V
IN
= 100mV
P-P
SQUARE WAVE
APPLIED TO V
CC
WITH NO BYPASS CAPACITOR
LOCAL ERROR
REMOTE ERROR
0
30
20
10
40
50
60
70
80
90
100
0.001 0.10.01 1 10 100
TEMPERATURE ERROR
vs. DXP NOISE FREQUENCY
MAX6642 toc05
FREQUENCY (kHz)
TEMPERATURE ERROR (°C)
LOCAL ERROR
REMOTE ERROR
V
IN
= AC-COUPLED TO DXP
V
IN
= 100mV
P-P
SQUARE WAVE
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
0
1.0
2.0
0.1 1 10 100
TEMPERATURE ERROR
vs. DXP-GND CAPACITANCE
MAX6642 toc06
DXP-GND CAPACITANCE (nF)
TEMPERATURE ERROR (°C)