ADT7461: Temperature Sensor with Series Resistance Cancellation

The ADT7461 is a dual-channel digital thermometer and under/over temperature alarm intended for use in PCs and thermal management systems. It is pin- and register-compatible with the ADM1032. The ADT7461 has three additional features: series resistance cancellation (where up to 3 kΩ (typical) of resistance in series with the temperature monitoring diode may be automatically cancelled from the temperature result, allowing noise filtering); configurable ~ALERT output; and an extended, switchable temperature measurement range.

Features
  • On-chip and Remote Temperature Sensor
  • 0.25°C Resolution/1°C Accuracy on Remote Channel
  • 1°C Resolution/3°C Accuracy on Local Channel
  • Automatically Cancels up to 3 kΩ (typical) of Resistance in Series with Remote Diode to Allow Noise Filtering
  • 2-wire SMBus Serial Interface with SMBus Alert Support
  • Programmable Over/Under Temperature Limits
  • Up to Two Over Temperature Fail-safe THERM Outputs
  • 170 µA Operating Current, 5.5 µA Standby Current
Applications
  • Thermal Management
End Products
  • Notebook and Desktop Computers
  • Game Consoles
  • RFID Readers
  • DSL Line Cards
Application Notes (4)
Document TitleDocument ID/SizeRevisionRevision Date
Conversion Rates Explained for the ADT7461AN864/D (73.0kB)1
Noise Filtering and the ADT7461AN699/D (252.0kB)1
Thermal Sensing Methods used in ON Semiconductor DevicesAND8494/D (137.0kB)0
Using the ADT7461 as a Multichannel Temperature SensorAN702/D (209.0kB)1
Package Drawings (2)
Document TitleDocument ID/SizeRevision
Micro 8 lead Surface Mount846A-02 (57.7kB)J
SOIC-8 Narrow Body751-07 (62.6kB)AK
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Temperature Monitor with Series Resistance CancellationADT7461/D (268kB)8
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
ADT7461ARMZLast ShipmentsPb-free Halide freeMicro8™846A-021Tube50
ADT7461ARMZ-2RLifetimePb-free Halide freeMicro8™846A-021Tape and Reel3000$2.0533
ADT7461ARMZ-2RL7Last ShipmentsPb-free Halide freeMicro8™846A-021Tape and Reel1000
ADT7461ARMZ-R7ActivePb-free Halide freeMicro8™846A-021Tape and Reel1000$1.54
ADT7461ARZLast ShipmentsPb-freeSOIC-8751-071Tube98
ADT7461ARZ-REELActivePb-freeSOIC-8751-071Tape and Reel2500$1.54
ADT7461ARZ-REEL7Last ShipmentsPb-freeSOIC-8751-071Tape and Reel1000
ADT7461ARLast ShipmentsSOIC-8751-071Tube98
ADT7461AR-REELLast ShipmentsSOIC-8751-071Tape and Reel2500
ADT7461AR-REEL7Last ShipmentsSOIC-8751-071Tape and Reel1000
ADT7461ARMLast ShipmentsMicro8™846A-021Tube50
ADT7461ARM-REELLast ShipmentsMicro8™846A-021Tape and Reel3000
ADT7461ARM-REEL7Last ShipmentsMicro8™846A-021Tape and Reel1000
Specifications
ProductSensor TypeData Transmission StandardICC Max (mA)VCC Min (V)VCC Max (V)T Min (°C)T Max (°C)Temperature Error (°C)
ADT7461ARMZ-R7Local & RemoteSMBus0.21535.5-40125±1
ADT7461ARZ-REELLocal & RemoteSMBus0.21535.5-40125±1
Temperature Monitor with Series Resistance Cancellation (268kB) ADT7461
Conversion Rates Explained for the ADT7461 ADT7461
Noise Filtering and the ADT7461 ADT7461
Thermal Sensing Methods used in ON Semiconductor Devices NCT1008
Using the ADT7461 as a Multichannel Temperature Sensor ADT7461
SOIC-8 Narrow Body CM1216
Micro 8 lead Surface Mount CM1216
ADT7461
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