ADM1032ARM-1 ON Semiconductor, ADM1032ARM-1 Datasheet

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ADM1032ARM-1

Manufacturer Part Number
ADM1032ARM-1
Description
IC TEMP MONITOR 108 DEF 8-MSOP
Manufacturer
ON Semiconductor
Datasheet

Specifications of ADM1032ARM-1

Rohs Status
RoHS non-compliant
Function
Temp Monitoring System (Sensor)
Topology
ADC, Comparator, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
0°C ~ 100°C, External Sensor
Output Type
SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
0°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
ADM1032
+15C Remote and Local
System Temperature Monitor
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.
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
Applications
© Semiconductor Components Industries, LLC, 2009
December, 2009 − Rev. 11
The ADM1032 is a dual−channel digital thermometer and
The ADM1032 communicates over a 2−wire serial interface
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
Desktop and Notebook Computers
Smart Batteries
Industrial Controllers
Telecommunications Equipment
Instrumentation
Embedded Systems
1
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
CASE 751
SOIC−8
(Note: Microdot may be in either location)
1
T1x = Refer to Order Info Table
A
Y
W
G
ORDERING INFORMATION
THERM
1
V
D+
D–
DD
= Assembly Location
= Year
= Work Week
= Pb−Free Package
http://onsemi.com
PIN ASSIGNMENT
CASE 846AB
1
2
3
4
MSOP−8
8
1
(Top View)
Marking #1
1032AR
#
Y
W
XX
#YWW
XXXX
Publication Order Number:
DIAGRAMS
= Pb−Free Package
= Year
= Work Week
= Assembly Lot
MARKING
8
7
6
5
8
1
SCLK
SDATA
ALERT
GND
8
1
AYWG
Marking #2
T1x
ADM1032/D
1032AR
G
#YWW
01

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ADM1032ARM-1 Summary of contents

Page 1

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 ...

Page 2

ON−CHIP TEMPERATURE SENSOR LOCAL TEMPERATURE VALUE REGISTER D+ ANALOG A/D MUX CONVERTER D– BUSY RUN/STANDBY REMOTE TEMPERATURE VALUE REGISTER REMOTE OFFSET REGISTER EXTERNAL DIODE OPEN−CIRCUIT ADM1032 V GND DD ABSOLUTE MAXIMUM RATINGS Parameter Positive Supply Voltage ( GND ...

Page 3

PIN ASSIGNMENT Pin No. Mnemonic 1 V Positive Supply Positive Connection to Remote Temperature Sensor. 3 D− Negative Connection to Remote Temperature Sensor. 4 THERM THERM is an open−drain output that can ...

Page 4

ELECTRICAL CHARACTERISTICS Parameter Serial Bus Timing (Note 2) SDATA Output Low Sink Current ALERT Output Low Sink Current Logic Input Current Input Capacitance, SCLK, SDATA Clock Frequency SMBus Timeout (Note 3) SCLK Clock Low Time, ...

Page 5

D+ TO GND 0 −4 − −12 – LEAKAGE RESISTANCE ( Figure 3. Temperature Error vs. Leakage Resistance 40mV p−p ...

Page 6

V = 100mV p− 50mV p− 25mV p− 100k 1M 10M FREQUENCY (Hz) Figure 9. Temperature Error vs. Common−Mode Noise Frequency ...

Page 7

Functional Description The ADM1032 is a local and remote temperature sensor and overtemperature alarm. When the ADM1032 is operating normally, the on−board A/D converter operates in a free running mode. The analog input multiplexer alternately selects either the on−chip temperature ...

Page 8

Temperature Data Format One LSB of the ADC corresponds to 0.125°C, so the ADC can measure from 0°C to 127.875°C. The temperature data format is shown in Table 1 and Table 2. The results of the local and remote temperature ...

Page 9

When Flag 1 and Flag 0 are set, the THERM output goes low to indicate that the temperature measurements are outside the programmed limits. THERM output does not need to be reset, unlike the ALERT output. Once the measurements are ...

Page 10

Table 7. Consecutive ALERT Register Codes Register Value Number of Out−of−Limit Measurements Required yxxx 000x yxxx 001x yxxx 011x yxxx 111x NOTE don’t care bits, and y = SMBus timeout bit. Default = 0. See SMBus section for ...

Page 11

The peripheral whose address corresponds to the transmitted address responds by pulling the data line low during the low period before the ...

Page 12

SCLK SDATA A6 START BY MASTER Figure 13. Writing a Register Address to the Address Pointer Register, 1 SCLK SDATA START BY MASTER SERIAL BUS ADDRESS BYTE Figure 14. Writing to the Address Pointer Register Only ...

Page 13

LSB added. The address of the device is now known, and it can be interrogated in the usual way more than one device’s ALERT output is low, the one with the lowest ...

Page 14

In this respect, the ADM1032 differs from and improves upon competitive devices that output zero if the external sensor goes short−circuit. These devices can misinterpret a genuine 0°C measurement as a fault condition. When the D+ and D− lines are ...

Page 15

Layout Considerations Digital boards can be electrically noisy environments, and the ADM1032 is measuring very small voltages from the remote sensor, so care must be taken to minimize noise induced at the sensor inputs. The following precautions should be taken. ...

Page 16

... ADM1032ARMZ−R7 8−Lead MSOP ADM1032ARMZ−001 8−Lead MSOP ADM1032ARMZ−1RL 8−Lead MSOP ADM1032ARMZ−002 8−Lead MSOP ADM1032ARMZ−2R 8−Lead MSOP ADM1032ARMZ−2RL7 8−Lead MSOP †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *The “ ...

Page 17

... G C SEATING PLANE −Z− 0.25 (0.010 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS SOIC−8 NB CASE 751−07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1 ...

Page 18

... A1 8X *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Protected by US Patents 5,982,221; 6,097,239; 6,133,753; 6,169,442; 5,867,012. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...

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