±1°C Digital Temperature Sensor with Series Resistance Cancellation

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Overview

The NCT1008 is a dual-channel digital temperature sensor intended for use in elevated thermal density applications. A feature of the NCT1008 is series resistance cancellation, where up to 1.5 kΩ of resistance in series with the temperature monitoring diode can be automatically cancelled from the temperature result, allowing noise filtering. The NCT1008 has a configurable ALERT output and an extended, switchable temperature measurement range. The NCT1008 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 ADM1032, but it can be switched to a wider measurement range of -64°C to +191°C. The NCT1008 communicates over a 2-wire serial interface, compatible with system management bus (SMBus/I2C) standards. The default SMBus/I2C address of the NCT1008 is 0x4C. An NCT1008D is available with an SMBus/I2C address of 0x4D. This is useful if more than one NCT1008 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.

  • Thermal Management
  • Notebook and Desktop Computers
  • Game Consoles
  • Servers
  • LCD TVs
  • Smart Electric Meters
  • Occupancy Sensors
  • DSL Line Cards
  • Graphics Cards
  • 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
  • Automatically cancels up to 1.5 kΩ (typical) of resistance in series with remote diode to allow noise filtering
  • Extended, switchable temperature measurement range 0°C to +127°C (default) or 64°C to +191°C
  • 2-wire SMBus serial interface with SMBus alert support
  • Programmable over/under temperature limits
  • Offset registers for system calibration
  • Up to two overtemperature fail-safe THERM outputs
  • Remote THERM Limit of 108°C
  • Compatible with 1.8 V Logic

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CAD Models

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Case Outline

MSL Type

MSL Temp (°C)

Container Type

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ON Target

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ICC Max (mA)

VCC Min (V)

VCC Max (V)

T Min (°C)

T Max (°C)

Temperature Error (°C)

Reference Price

NCT1008CMN3R2G

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Obsolete

CAD Model

Pb

A

H

P

DFN-8

1

260

REEL

3000

N

Local & Remote

I2C

0.35

2.8

3.6

-40

125

±1

Price N/A

More Details

NCT1008CMT3R2G

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Obsolete

CAD Model

Pb

A

H

P

WDFN-8

1

260

REEL

3000

N

Local & Remote

I2C

0.35

2.8

3.6

-40

125

±1

Price N/A

More Details

NCT1008DMN3R2G

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Obsolete

CAD Model

Pb

A

H

P

DFN-8

1

260

REEL

3000

N

Local & Remote

I2C

0.35

2.8

3.6

-40

125

±1

Price N/A

More Details

NCT1008DMT3R2G

Loading...

Obsolete

CAD Model

Pb

A

H

P

WDFN-8

1

260

REEL

3000

N

Local & Remote

I2C

0.35

2.8

3.6

-40

125

±1

Price N/A

More Details

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