NCT1008
NCT1008 is +-1 C Temperature Monitor manufactured by onsemi.
+15C Temperature Monitor with Series Resistance Cancellation
The NCT1008 is a dual-channel digital thermometer and undertemperature/overtemperature alarm, intended for use in PCs and thermal management systems. It is register-patible 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, patible with the ADM1032, but it can be switched to a wider measurement range of
- 64°C to +191°C.
The NCT1008 municates over a 2-wire serial interface, patible 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 parator 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-patible 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...
