ADM1032ARMZ-1RL Datasheet ADM1032ARZ-001, ADM1032ARMZ-002, ADM1032ARMZ-REEL | P1-P3

October, 2013 − Rev. 13

1 Publication Order Number:

ADM1032/D

ADM1032

+15C Remote and Local

System Temperature Monitor

The ADM1032 is a dual-channel digital thermometer and

under/overtemperature alarm intended for use in PCs and thermal

management systems. The device can measure the temperature of a

remote thermal diode, which can be located on the processor die or can

be a discrete device (2N3904/06), accurate to 1°C. A novel

measurement technique cancels out the absolute value of the

transistor’s base emitter voltage so that no calibration is required. The

ADM1032 also measures its ambient temperature.

The ADM1032 communicates over a 2-wire serial interface

compatible with System Management Bus (SMBus) standards.

Under/overtemperature limits can be programmed into the device over

the SMBus, and an ALERT

output signals when the on−chip or remote

temperature measurement is out of range. This output can be used as

an interrupt or as a SMBus alert. The THERM output is a comparator

output that allows CPU clock throttling or on/off control of a cooling

fan. An ADM1032−1 and ADM1032−2 are available. The difference

between the ADM1032 and the ADM1032−1 is the default value of

the external THERM

limit. The ADM1032−2 has a different SMBus

address. The SMBus address of the ADM1032−2 is 0x4D.

Features

• On-chip and Remote Temperature Sensing

• Offset Registers for System Calibration

• 0.125°C Resolution/1°C Accuracy on Remote Channel

• 1°C Resolution/3°C Accuracy on Local Channel

• Fast (Up to 64 Measurements Per Second)

• 2-wire SMBus Serial Interface

• Supports SMBus Alert

• Programmable Under/Overtemperature Limits

• Programmable Fault Queue

• Overtemperature Fail-safe THERM Output

• Programmable THERM Limits

• Programmable THERM Hysteresis

• 170 mA Operating Current

• 5.5 mA Standby Current

• 3.0 V to 5.5 V Supply

• Small 8-lead SOIC and MSOP Packages

• These are Pb-Free Devices*

Applications

• Desktop and Notebook Computers

• Smart Batteries

• Industrial Controllers

• Telecommunications Equipment

• Instrumentation

• Embedded Systems

*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting

Techniques Reference Manual, SOLDERRM/D.

MARKING DIAGRAMS

http://onsemi.com

PIN ASSIGNMENT

(Top View)

See detailed ordering and shipping information in the package

dimensions section on page 16 of this data sheet.

ORDERING INFORMATION

MSOP−8

CASE 846AB

SOIC−8 NB

CASE 751

1032AR

#YYWW

XXXX

T1x = Refer to Order Info Table

A = Assembly Location

Y = Year

W = Work Week

G = Pb-Free Package

T1x

AYWG

1032AR

#YYWW

Marking #2Marking #1

1023AR = Specific Device Code

# = Pb-Free Package

YY = Year

W = Work Week

XX = Assembly Lot

(Note: Microdot may be in either location)

MSOP−8

SOIC−8 NB

SCLK

SDATA

ALERT

GND

D+

D−

THERM

ADM1032

http://onsemi.com

Figure 1. Functional Block Diagram

ON-CHIP

TEMPERATURE

SENSOR

ANALOG

MUX

BUSY

A/D

CONVERTER

LOCAL TEMPERATURE

VALUE REGISTER

REMOTE TEMPERATURE

VALUE REGISTER

REMOTE OFFSET

RUN/STANDBY

EXTERNAL DIODE OPEN-CIRCUIT

STATUS REGISTER

SMBUS INTERFACE

LIMIT

COMPARATOR

DIGITAL MUX

INTERRUPT

MASKING

SDATA SCLK

ADDRESS POINTER

CONVERSION RATE

LOCAL TEMPERATURE

LOW LIMIT REGISTER

LOCAL TEMPERATURE

HIGH LIMIT REGISTER

REMOTE TEMPERATURE

LOW LIMIT REGISTER

REMOTE TEMPERATURE

HIGH LIMIT REGISTER

LOCAL THERM

LIMIT

EXTERNAL THERM LIMIT

CONFIGURATION

GND

ADM1032

D+

D−

ALERT

THERM

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameter Rating Unit

Positive Supply Voltage (V

) to GND −0.3, +5.5 V

D+ −0.3 to V

+ 0.3 V

D− to GND −0.3 to +0.6 V

SCLK, SDATA, ALERT −0.3 to +5.5 V

THERM −0.3 to V

+ 0.3 V

Input Current, SDATA, THERM −1, +50 mA

Input Current, D− ±1 mA

ESD Rating, All Pins (Human Body Model) > 1000 V

Maximum Junction Temperature (T

Max

) 150 °C

Storage Temperature Range −65 to +150 °C

IR Reflow Peak Temperature 220 °C

IR Reflow Peak Temperature for Pb-Free 260 °C

Lead Temperature (Soldering 10 sec) 300 °C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.

Table 2. THERMAL CHARACTERISTICS

Package Type

Unit

8-lead SOIC NB Package 121 °C

8-lead MSOP Package 142 °C

ADM1032

http://onsemi.com

Table 3. PIN ASSIGNMENT

Pin No. Mnemonic Description

1 V

Positive Supply, 3.0 V to 5.5 V.

2 D+ Positive Connection to Remote Temperature Sensor.

3 D− Negative Connection to Remote Temperature Sensor.

4 THERM 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

, the same supply as the ADM1032.

Note: Please refer to Power Sequencing Considerations; THERM

Pin Pullup on page 15 for more

information.

5 GND Supply Ground Connection.

6 ALERT Open-Drain Logic Output Used as Interrupt or SMBus Alert.

7 SDATA Logic Input/Output, SMBus Serial Data. Open-drain output. Requires pullup resistor.

SCLK Logic Input, SMBus Serial Clock. Requires pullup resistor.

Table 4. ELECTRICAL CHARACTERISTICS

Parameter Conditions Min Typ Max Unit

Power Supply

Supply Voltage, V

3.0 3.30 5.5 V

Average Operating Supply Current, I

0.0625 Conversions/Sec Rate (Note 1) − 170 215

Standby Mode − 5.5 10

Undervoltage Lockout Threshold V

Input, Disables ADC, Rising Edge 2.35 2.55 2.8 V

Power-On Reset Threshold 1.0 − 2.4 V

Temperature-To-Digital Converter

Local Sensor Accuracy

0 ≤ T

≤ 100°C, V

= 3 V to 3.6 V − ±1 ±3 °C

Resolution − 1.0 − °C

Remote Diode Sensor Accuracy 60°C ≤ T

≤ 100°C, V

= 3 V to 3.6 V

0°C ≤ T

≤ 120°C

−

±1

±3

°C

Resolution − 0.125 − °C

Remote Sensor Source Current High Level (Note 2)

Low Level (Note 2)

−

230

−

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)

35.7

5.7

−

142.8

22.8

Open-Drain Digital Outputs (THERM, ALERT)

Output Low Voltage, V

OUT

= −6.0 mA (Note 2) − − 0.4 V

High Level Output Leakage Current, I

OUT

= V

(Note 2) − 0.1 1.0

Serial Bus Timing (Note 2)

Logic Input High Voltage, V

SCLK, SDATA

= 3.0 V to 5.5 V 2.1 − − V

Logic Input Low Voltage, V

= 3.0 V to 5.5 V − − 0.8 V

Hysteresis

SCLK, SDATA

− 500 − mV

SDATA Output Low Sink Current SDATA Forced to 0.6 V 6.0 − − mA

ALERT Output Low Sink Current ALERT Forced to 0.4 V 1.0 − − mA

Logic Input Current, I

, I

−1.0 − +1.0

Input Capacitance, SCLK, SDATA − 5.0 − pF

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18

ADM1032ARMZ-1RL

Mfr. #:

Buy ADM1032ARMZ-1RL

Manufacturer:

ON Semiconductor

Description:

Board Mount Temperature Sensors 1C TDM USOIC8 100C THRMIC

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ADM1032ARMZ-1RL

ADM1032ARMZ-1RL

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