NCT1008 ± 1 ºC Temperature Monitor with Series Resistance Cancellation

PublishTime：2021-06-15

●The NCT1008 is a dual-channel digital thermometer and undertemperature/overtemperature alarm, intended for use in PCs and thermal management systems. It is register-compatible with the ADM1032 and ADT7461. A feature of the NCT1008 is series resistance cancellation, where up to 1.5 k W (typical) 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.
●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 k W
■ Extended, Switchable Temperature Measurement Range 0 °C to +127 °C (Default) or –64 °C to +191 °C
■ Register-compatible with ADM1032 and ADT7461
■ 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
■ Small 8-lead DFN
■ 240 μA Operating Current, 5 μA Standby Current
■ Compatible with 1.8 V Logic
■ Pb-Free Packages are Available

Brand of Product：	ON Semiconductor
Part#：	NCT1008D 、 NCT1008 、 NCT1008CMT3R2G 、 NCT1008DMT3R2G 、 NCT1008CMN3R2G 、 NCT1008DMN3R2G More Part#
Product Category：	Temperature Monitor More
Application：	[ Smart Phones ][ Desktop and Notebook Computers ][ Smart Batteries ][ Automotive ][ Embedded Systems ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	WDFN8;DFN8
Language：	English Chinese Chinese and English Japanese
Date of Creation：	July, 2012
Version Number：	Rev. 6
Data Encoding：	NCT1008/D
Data Size：	476 KB

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