NCT72: ±1°C Temperature Monitor with Series Resistance Cancellation

Datasheet: +/- 1°C Temperature Monitor with Series Resistance Cancellation
Rev. 5 (249kB)
Product Overview
View Reliability Data
View Material Composition
Product Change Notification
The NCT72 is a dual-channel digital thermometer and undertemperature/overtemperature alarm, intended for use in PCs and thermal management systems. It is pin and register compatible with the NCT1008 but the NCT72 allows the user to pull the /ALERT pin to 1.8V without increasin the device Idd. A feature of the NCT72 is series resistance cancellation, where up to 1.5 kΩ (typical) of resistance in series with the temperature monitoring diode can be automatically cancelled from the temperature result, allowing noise filtering. The NCT72 has a configurable /ALERT output and an extended, switchable temperature measurement range. The NCT72 can measure the temperature of a remote thermal diode accurate to ±1°C and the ambient temperature accurate to ±3°C. The temperature measurement range defaults to 0°C to +127°C, compatible with the NCT1008, but it can be switched to a wider measurement range of -64°C to +191°C. The NCT72 communicates over a 2-wire serial interface, compatible with system management bus (SMBus/I2C) standards. The default SMBus/I2C address of the NCT72 is 0x4C. An NCT72D is available with an SMBus/I2C address of 0x4D. This is useful if more than one NCT72 is used on the same SMBus/I2C. An /ALERT output signals when the on-chip or remote temperature is out of range. The /THERM output is a comparator output that allows on/off control of a cooling fan. The /ALERT output can be reconfigured as a second /THERM output, if required.
Features
 
  • On-Chip and Remote Temperature Sensor
  • 0.25°C Resolution/1°C Accuracy on Remote Channel
  • 1°C Resolution/1°C Accuracy on Local Channel
  • Series Resistance Cancellation up to 1.5 kΩ
  • Extended, Switchable Temperature Measurement Range 0°C to +127°C (Default) or -64°C to +191°C
  • Pin and Register Compatible with NCT1008
  • Remote /THERM limit of 108°C
  • 2-Wire SMBus/I2C Serial Interface with SMBus Alert Support
  • Programmable Over/Undertemperature Limits
  • Offset Registers for System Calibration
  • Up to Two Overtemperature Fail-Safe /THERM Outputs
  • 240 µA Operating Current, 5 µA Standby Current
  • Compatible with 1.8 V Logic
Applications   End Products
  • Thermal Management
 
  • Notebook and Desktop Computers
  • Game Consoles
  • LCD TVs
  • Occupancy Sensors
  • DSL Line Cards
  • Dishwashers
  • Refrigerators
  • Vacuum Cleaners
  • Induction Cookers
  • RFID Readers
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
STR-SENSORS-GEVK Active
Pb-free
Strata Enabled Multi-Sensor Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Interactive Block Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCT72CMNR2G Obsolete
Pb-free
Halide free
NCT72 DFN-8 506BJ 1 260 Tape and Reel 3000  
NCT72CMTR2G Active
Pb-free
Halide free
NCT72 WDFN-8 511AT 1 260 Tape and Reel 3000 $0.7052
NCT72DMNR2G Active
Pb-free
Halide free
NCT72 DFN-8 506BJ 1 260 Tape and Reel 3000 $0.5764
NCT72DMTR2G Obsolete
Pb-free
Halide free
NCT72 WDFN-8 511AT 1 260 Tape and Reel 3000  
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 13 to 16
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
Sensor Type
Data Transmission Standard
ICC Max (mA)
VCC Min (V)
VCC Max (V)
T Min (°C)
T Max (°C)
Temperature Error (°C)
Package Type
NCT72CMTR2G  
 $0.7052 
Pb
H
 Active   
Local & Remote
I2C
0.35
2.8
3.6
-40
125
±1
WDFN-8
NCT72DMNR2G  
 $0.5764 
Pb
H
 Active   
Local & Remote
I2C
0.35
2.8
3.6
-40
125
±1
DFN-8
Case Outlines
506BJ    511AT   
Packages
NCT72: ±1°C Temperature Monitor with Series Resistance Cancellation
NCT72: ±1°C Temperature Monitor with Series Resistance Cancellation
Previously Viewed Products
Clear List

Featured Video
Strata-Enabled, Cloud-Connected Multi-Sensor Board
Your request has been submitted for approval.
Please allow 2-5 business days for a response.
You will receive an email when your request is approved.
Request for this document already exists and is waiting for approval.