_______________________________________________________________________________________ 5
TEMPERATURE ERROR
vs. DXP-DXN CAPACITANCE
DXP-DXN CAPACITANCE (nF)
10
-4.5
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
-5.0
1
100
7-Channel Precision Remote-Diode, Thermistor,
and Local Temperature Monitor
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, T
A
= +25癈, unless otherwise noted.)
0
10
5
20
15
25
30
0
50
25
75
100
125
ALERT, OVERT SINK CURRENT
vs. TEMPERATUREo
TEMPERATURE (癈)
V
OL
= 0.3V
V
OL
= 0.1V
THERMISTOR ADC ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
FREQUENCY (MHz)
10
1
0.1
-4
-3
-2
-1
0
1
2
3
4
5
-5
0.01
100
100mV
P-P
Pin Description
PIN
NAME
FUNCTION
1
DXP1
Combined Current Source and A/D Positive Input for Channel 1 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to V
CC
if no
remote diode is used. Place a 2200pF capacitor between DXP1 and DXN1 for noise filtering.
2
DXN1
Cathode Input for Channel 1 Remote Diode. Connect the cathode of the channel 1 remote-diode-
connected transistor to DXN1.
3
DXP2
Combined Current Source and A/D Positive Input for Channel 2 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to V
CC
if no
remote diode is used. Place a 2200pF capacitor between DXP2 and DXN2 for noise filtering.
4
DXN2
Cathode Input for Channel 2 Remote Diode. Connect the cathode of the channel 2 remote-diode-
connected transistor to DXN2.
5
DXP3
Combined Current Source and A/D Positive Input for Channel 3 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to V
CC
if no
remote diode is used. Place a 2200pF capacitor between DXP3 and DXN3 for noise filtering.
6
DXN3
Cathode Input for Channel 3 Remote Diode. Connect the cathode of the channel 1 remote-diode-
connected transistor to DXN3.
7
THER3
Thermistor Voltage Sense Input 3. Connect thermistor 3 between THER3 and ground and an external
resistor R
EXT3
between THER3 and VREF.
8
VREF
Thermistor Reference Voltage (1V Nominal). VREF is automatically enabled for a thermistor
conversion, and is disabled for diode measurements.
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