LM92 - ±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator with Two-Wire Interface from the PowerWise® Family

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Features
Window comparison simplifies design of ACPI compatible temperature monitoring and control.
Serial Bus interface
Separate open-drain outputs for Interrupt and Critical Temperature shutdown
Shutdown mode to minimize power consumption
Up to 4 LM92s can be connected to a single bus
12-bit + sign output
Operation up to 150°C

Key Specification


Supply Voltage2.7V to 5.5V
Supply Current operating350 µA (typ)
625 µA (max)
shutdown5 µA (typ)
Temperature30°C±0.33°C (max)
Accuracy10°C to 50°C±0.50°C (max)
 -10°C to 85°C±1.0°C (max)
  125°C±1.25°C (max)
  -25°C to 150°C±1.5°C (max)
Linearity ±0.5°C (max)
Resolution 0.0625°C

General Description


The LM92 is a digital temperature sensor and thermal window comparator with an I2C™ Serial Bus interface and an accuracy of ±0.33°C. More...


Applications


HVAC
Medical Electronics
Electronic Test Equipment
System Thermal Management
Personal Computers
Office Electronics
Automotive
  Typical Application
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Parametric Table     expand
Parametric Table    collapse
Temperature Accuracy (+/-) 0.33 deg C
Supply Min 2.7 Volt
Quiescent Current 0.625 mA
Temperature Min -55 deg C
Temperature Max 150 deg C
Interface Type 2-Wire Serial
Temperature Accuracy (+/-) 0.33 deg C
Supply Min 2.7 Volt
Quiescent Current 0.625 mA
Temperature Min -55 deg C
Temperature Max 150 deg C
Interface Type 2-Wire Serial
Programmable Setpoints Yes
Resolution 13 bit
Resolution degC/LSB 0.0625
Supply Max 5.5 Volt
Shut down Yes
Interrupt Outputs 2
Fault Queue Yes
Automotive Selection Guide Yes
PowerWise Yes
View Using Catalog


Typical Performance


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  Also Recommended
LM95234Lower Cost
LM95241Lower Cost

Additional Resources


Online Seminars Design Tools (see below)


Block Diagram


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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to View Online Click link below to Download Click link below to Receive via Email
LM92 ±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator with Two-Wire Interface 811 Kbytes 11-Mar-05 View Online Download Receive via Email
LM92 ±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator with Two-Wire Interface (Japanese)
578 Kbytes   View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM92CIMSOIC NARROW8STD
NOPB
1
1
235
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.70rail
of
95
NSZXTT
LM92
CIM
8 weeks1000

General Description


The LM92 is a digital temperature sensor and thermal window comparator with an I2C™ Serial Bus interface and an accuracy of ±0.33°C. The window-comparator architecture of the LM92 eases the design of temperature control systems. The open-drain Interrupt (INT) output becomes active whenever temperature goes outside a programmable window, while a separate Critical Temperature Alarm (T_CRIT_A) output becomes active when the temperature exceeds a programmable critical limit. The INT output can operate in either a comparator or event mode, while the T_CRIT_A output operates in comparator mode only.

The host can program both the upper and lower limits of the window as well as the critical temperature limit. Programmable hysterisis as well as a fault queue are available to minimize false tripping. Two pins (A0, A1) are available for address selection. The sensor powers up with default thresholds of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.

The LM92's 2.7V to 5.5V supply voltage range, Serial Bus interface, 12-bit + sign output, and full-scale range of over 128°C make it ideal for a wide range of applications. These include thermal management and protection applications in personal computers, electronic test equipment, office electronics, automotive, medical and HVAC applications.

Reliability Metrics


Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM92CIMCS06512621539029170002827706714

For more information on Reliability Metrics, please click here.


Design Tools


TitleSize in Kbytes Date Click link below to View Online Click link below to Download Click link below to Receive via Email
LMxx - Windows 95/98 VXD drivers with stand alone application for talking to temperature sensors or hardware monitors on a mother board 1366 Kbytes 28-Jul-2003 View Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Reference Designs
RD-133 - IEEE 1588 Compliant Industrial 802.3 Switch Reference Design

[Information as of 5-Sep-2008]