ADM1032
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
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
60°C
≤
T
D
≤
100°C, V
CC
= 3 V to 3.6 V
0°C
≤
T
D
≤
120°C
Resolution
Remote Sensor Source Current
High level (Note 2)
Low level (Note 2)
Conversion Time
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)
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
V
DD
= 3.0 V to 5.5 V
V
DD
= 3.0 V to 5.5 V
500
2.1
0.8
V
V
mV
I
OUT
=
−6.0
mA (Note 2)
V
OUT
= V
DD
(Note 2)
0.1
0.4
1.0
V
mA
35.7
0.125
230
13
142.8
0
≤
T
A
≤
100°C, V
CC
= 3 V to 3.6 V
±1
1.0
±1
±3
±3
°C
°C
°C
°C
°C
mA
mA
ms
0.0625 conversions/sec rate (Note 1)
Standby mode
V
DD
input, disables ADC, rising edge
2.35
1.0
3.0
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
5.7
22.8
ms
1. See Table 6 for information on other conversion rates.
2. Guaranteed by design, not production tested.
3. The SMBus timeout is a programmable feature. By default, it is not enabled. Details on how to enable it are available in the Serial Bus
Interface section.
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