ADM1032
Table 3. PIN ASSIGNMENT
Pin No.
1
2
3
4
Mnemonic
V
DD
D+
D−
THERM
Positive Supply, 3.0 V to 5.5 V.
Positive Connection to Remote Temperature Sensor.
Negative Connection to Remote Temperature Sensor.
THERM is an open-drain output that can be used to turn a fan on/off or throttle a CPU clock in the event
of an overtemperature condition. Requires pullup to V
DD
, the same supply as the ADM1032.
Note: Please refer to Power Sequencing Considerations; THERM Pin Pullup on page 15 for more
information.
Supply Ground Connection.
Open-Drain Logic Output Used as Interrupt or SMBus Alert.
Logic Input/Output, SMBus Serial Data. Open-drain output. Requires pullup resistor.
Logic Input, SMBus Serial Clock. Requires pullup resistor.
Description
5
6
7
GND
ALERT
SDATA
SCLK
8
Table 4. ELECTRICAL CHARACTERISTICS
Parameter
Power Supply
Supply Voltage, V
DD
Average Operating Supply Current, I
CC
Undervoltage Lockout Threshold
Power-On Reset Threshold
Temperature-To-Digital Converter
Local Sensor Accuracy
Resolution
Remote Diode Sensor Accuracy
Resolution
Remote Sensor Source Current
Conversion Time
High Level (Note 2)
Low Level (Note 2)
From stop bit to conversion complete
Both channels: one-shot mode with averaging
switched on
One-shot mode with averaging off (that is,
conversion rate = 32 or 64 conversions per second)
60°C
≤
T
D
≤
100°C, V
CC
= 3 V to 3.6 V
0°C
≤
T
D
≤
120°C
0
≤
T
A
≤
100°C, V
CC
= 3 V to 3.6 V
−
−
−
−
−
−
−
35.7
5.7
±1
1.0
−
−
0.125
230
13
−
−
±3
−
±1
±3
−
−
−
142.8
22.8
°C
°C
°C
°C
mA
ms
0.0625 Conversions/Sec Rate (Note 1)
Standby Mode
V
DD
Input, Disables ADC, Rising Edge
3.0
−
−
2.35
1.0
3.30
170
5.5
2.55
−
5.5
215
10
2.8
2.4
V
mA
mA
V
V
Conditions
Min
Typ
Max
Unit
Open-Drain Digital Outputs (THERM, ALERT)
Output Low Voltage, V
OL
High Level Output Leakage Current, I
OH
Serial Bus Timing
(Note 2)
Logic Input High Voltage, V
IH
SCLK, SDATA
Logic Input Low Voltage, V
IL
Hysteresis
SCLK, SDATA
SDATA Output Low Sink Current
ALERT Output Low Sink Current
Logic Input Current, I
IH
, I
IL
Input Capacitance, SCLK, SDATA
SDATA Forced to 0.6 V
ALERT Forced to 0.4 V
V
DD
= 3.0 V to 5.5 V
V
DD
= 3.0 V to 5.5 V
2.1
−
−
6.0
1.0
−1.0
−
−
−
500
−
−
−
5.0
−
0.8
−
−
−
+1.0
−
V
V
mV
mA
mA
mA
pF
I
OUT
=
−6.0
mA (Note 2)
V
OUT
= V
DD
(Note 2)
−
−
−
0.1
0.4
1.0
V
mA
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