MAX6648, MAX6692

Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms

 Overview   Design Resources   Ordering Info   Related Products   All   

Status Explanations for product status codes

Active: In Production.

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.

Data Sheet

Download this datasheet in PDF formatDownload Rev 4 (PDF, 200kB)
Send this datasheet to any email addressEmail

My Maxim: Not Logged In
By logging in to My Maxim you can subscribe to alerts for this data sheet.

Login | Register
An evaluation board is available: MAX6692EVKIT, MAX6692EVSYS

Key Features

  • 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
 

Applications/Uses

  • 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)
Budgetary
Price
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 $1.50 @1k
MAX6692 
See All Temperature Sensors (111)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

MAX6648, MAX6692: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release   2002-09-03 ]
Temperature Family by Product Type

Didn't Find What You Need?

Information Index

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