MAX6692:Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms

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.

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
MAX6648, MAX6692: Typical Operating Circuit
MAX6648, MAX6692: Typical Operating Circuit
Applications/Uses
  • Desktop Computers
  • Multichip Modules
  • Notebook Computers
  • Servers
  • Test and Measurement Equipment
  • Thin Clients
  • Workstations
DataSheet
titleDownload file
MAX6648-MAX6692 Data SheetMAX6648-MAX6692.pdf
Parametrics
Part NumberSensor TypeAlarm OutputFunctionsInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Thresh.Temp. Resolution
(bits)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
MAX6648RemoteAlert
Overt
Dual Temperature Alarms
Remote & Local Sensor
2-Wire/I2C/SMBusOne0.8NoProgrammable10-55 to +125µMAX/8$1.67 @1k
MAX6692µMAX/8
SOIC(N)/8
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX6657:±1°C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6692MSANo Longer AvailableMAX6692MSA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX6692MSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +125°CLead Free
MAX6692MSA+TActiveN.SO;8 pin-40°C to +85°CSee data sheet
MAX6692MSA-TNo Longer AvailableMAX6692MSA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX6692MUANo Longer AvailableMAX6692MUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX6692MUA+ActiveµMAX,;8 pin;15.6 mm²0°C to +125°CLead Free
MAX6692MUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX6692MUA-TNo Longer AvailableMAX6692MUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX6692YMSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +125°CLead Free
MAX6692YMSA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6692YMUA+ActiveµMAX,;8 pin;15.6 mm²0°C to +125°CLead Free
MAX6692YMUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX6648-MAX6692.pdf MAX6692
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Compensating for Ideality Factor and Series Resistance Differences between Thermal-Sense Diodes MAX6699
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MAX6648-MAX6692.pdf MAX6648