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Maxim > Products > [Temperature Sensors] 
MAX6648, MAX6692
Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 200kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX6648/MAX6692 are precise, two-channel digital temperature sensors. They accurately measure the temperature of their own die and a remote PN junction, and report the temperature in digital form using a 2-wire serial interface. The remote PN junction is typically the emitter-base junction of a common-collector PNP on a CPU, FPGA, or ASIC.

The 2-wire serial interface accepts standard System Management Bus (SMBus™) write byte, read byte, send byte, and receive byte commands to read the temperature data and to program the alarm thresholds. To enhance system reliability, the MAX6648/MAX6692 include an SMBus timeout. A fault queue prevents the active-low ALERT and active-low OVERT outputs from setting until a fault has been detected one, two, or three consecutive times (programmable).

The MAX6648/MAX6692 provide two system alarms: active-low ALERT and active-low OVERT. Active-low ALERT asserts when any of four temperature conditions are violated: local overtemperature, remote overtemperature, local undertemperature, or remote undertemperature. Active-low OVERT asserts when the temperature rises above the value in either of the two active-low OVERT limit registers. The active-low OVERT output can be used to activate a cooling fan, or to trigger a system shutdown.

Measurements can be done autonomously, with the conversion rate programmed by the user, or in a single-shot mode. The adjustable conversion rate allows the user to optimize supply current and temperature update rate to match system needs.

Remote accuracy is ±0.8°C maximum error between +25°C and +125°C with no calibration needed. The MAX6648/MAX6692 operate from -55°C to +125°C, and measure temperatures between 0°C and +125°C. The MAX6648 is available in an 8-pin µMAX® package, and the MAX6692 is available in 8-pin µMAX and SO packages.

An evaluation kit is available:  MAX6692EVKIT, MAX6692EVSYS  

Key Features   Applications/Uses
  • Dual Channel: Measures Remote and Local Temperature
  • 0.125°C Resolution
  • High Accuracy: ±0.8°C (max) from +25°C to +125°C (Remote), and ±2°C (max) from +60°C to +100°C (Local)
  • Two Alarm Outputs: Active-Low ALERT and Active-Low OVERT
  • Two Default Active-Low OVERT Thresholds Available
    • MAX6648: +110°C
    • MAX6692: +85°C
  • Programmable Conversion Rate
  • SMBus-Compatible Interface
  • SMBus Timeout
  • Programmable Under/Overtemperature Alarm Thresholds
  • Compatible with 90nm, 65nm, and 45nm Process Technology

 
  		• Desktop Computers
  		• Multichip Modules
  		• Notebook Computers
  		• Servers
  		• Test and Measurement Equipment
  		• Thin Clients
  		• Workstations

    Key Specifications:  Temperature Sensors
    Part Number Sensor Type Alarm Output Functions Interface Remote Chan. Accuracy
    (±°C)    		 Parasite Pwr. Temp. Thresh. Temp. Resolution
    (bits)    		 Oper. Temp.
    (°C)    		 Smallest Available Pckg.
    (mm2)    		 Price
    max w/pins See Notes
    MAX6648  Remote
    Alert
    Overt
    Dual Temperature Alarms
    Remote & Local Sensor
    		 2-Wire/I2C/SMBus Single 0.8 No Programmable 10 -55 to +125 16 $1.50 @1k
    MAX6692  $1.50 @1k
    See All Temperature Sensors (99)

    Diagram
    MAX6648, MAX6692: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 1057: Compensating for Ideality Factor and Series Resistance Differences between Thermal Sense Diodes - MAX6692
  		• Application Note 3178: Extended-Range Temperature-Sensing ICs - MAX6692
  		• Application Note 3502: Effect of PC Board Trace Width on Remote-Diode Temperature-Sensor Accuracy - MAX6648, MAX6692

    Evaluation Kits
  		• MAX6692EVKIT, MAX6692EVSYS

    Design Guides
  		• Thermal Management (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
  		• MAX6691 IBIS Model
  		• MAX6691 IBIS Model

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-18 of 18

    MAX6648 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6648MUA    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6648MUA-T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6648MUA+  
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6648MUA+T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6648YMUA+    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6648YMUA+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX6692 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6692MSA    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6692MSA-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX6692MSA+  
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6692MSA+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX6692YMSA+  
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6692YMSA+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX6692MUA    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8CN-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6692MUA-T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8CN-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6692MUA+  
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8CN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6692MUA+T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8CN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6692YMUA+  
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8CN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6692YMUA+T    
    		Active µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8CN+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX6648 MAX6692
  		• New Product Press Release 2002-09-03 
  		• Temperature Family by Product Type

    Related Products
    MAX6657, MAX6658, MAX6659 ±1°C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms

    More Like This: View Product Families for Similar Products

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     Description 
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    Document Ref.: 19-2545; Rev 4; 2008-07-02
    This page last modified: 2009-10-14


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