Overview
The NCT214MT3R2G, produced by onsemi, is a dual-channel digital thermometer designed for precise temperature monitoring and thermal management. It is register-compatible with the ADM1032 and ADT7461, making it a versatile component for various applications. This device features both on-chip and remote temperature sensing capabilities, with an extended, switchable temperature measurement range. It is particularly useful in environments where accurate temperature monitoring is crucial, such as in PCs, industrial controllers, and automotive systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage, VDD | 3.0 | 3.30 | 3.6 | V |
| Average Operating Supply Current, IDD | - | 240 | 350 | μA |
| Standby Mode Current | - | 5 | 30 | μA |
| Local Sensor Accuracy (0°C ≤ TA ≤ +70°C) | - | ±1.0 | - | °C |
| Remote Diode Sensor Accuracy (0°C ≤ TA ≤ +70°C, -55°C ≤ TD ≤ +150°C) | - | ±1.0 | - | °C |
| Resolution (Local/Remote) | - | 1.0 / 0.25 | - | °C |
| Temperature Measurement Range (Default/Extended) | 0°C to +127°C / -64°C to +191°C | - | - | °C |
| Series Resistance Cancellation | - | Up to 1.5 kΩ | - | Ω |
| Communication Interface | - | 2-wire SMBus/I2C | - | - |
Key Features
- On-chip and remote temperature sensing with high accuracy (±1°C for remote, ±3°C for ambient)
- Extended, switchable temperature measurement range (0°C to +127°C or -64°C to +191°C)
- Series resistance cancellation up to 1.5 kΩ for improved accuracy
- Register-compatible with ADM1032 and ADT7461
- 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
- Pb-free, halogen-free, and RoHS compliant
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Automotive systems
- Embedded systems
Q & A
- What is the default temperature measurement range of the NCT214MT3R2G?
The default temperature measurement range is 0°C to +127°C.
- Can the temperature measurement range be extended?
- What is the accuracy of the remote temperature sensor?
The remote temperature sensor has an accuracy of ±1.0°C.
- How does the NCT214MT3R2G handle series resistance in the temperature monitoring diode?
The device can automatically cancel up to 1.5 kΩ of series resistance, improving the accuracy of the temperature measurement.
- What communication interface does the NCT214MT3R2G use?
The device uses a 2-wire SMBus/I2C serial interface.
- Can multiple NCT214MT3R2G devices be used on the same bus?
- What is the purpose of the ALERT and THERM outputs?
The ALERT output signals when the temperature is out of range, and the THERM output allows on/off control of a cooling fan. The ALERT output can also be configured as a second THERM output.
- Is the NCT214MT3R2G compliant with environmental regulations?
- What is the operating supply current of the NCT214MT3R2G?
The average operating supply current is 240 μA, and the standby current is 5 μA.
- How does the device handle noise in the environment?
The NCT214MT3R2G can add resistances to the sensor path to produce a filter, allowing it to be used in noisy environments.
