Overview
The ADT7481ARMZ-REEL, although often associated with Analog Devices due to historical context, is actually a product of onsemi (formerly part of ON Semiconductor). This component is a 3-channel digital thermometer designed for use in PCs and thermal management systems. It offers precise temperature measurement and alarm functions, making it a versatile tool for monitoring and controlling temperature in various electronic systems.
Key Specifications
| Parameter | Rating/Value | Unit |
|---|---|---|
| Positive Supply Voltage (VDD) to GND | −0.3 to +3.6 | V |
| Input Current, SDATA, THERM | −1 to +50 | mA |
| SMBus Input Capacitance, SCLK, SDATA | − 5.0 | pF |
| SMBus Clock Frequency | − 400 kHz | kHz |
| Local Temperature Measurement Range | 0°C to +127°C (default), −64°C to +191°C (extended) | °C |
| Remote Temperature Measurement Range | −64°C to +191°C | °C |
| Local Temperature Accuracy | ±1°C | °C |
| Remote Temperature Accuracy | ±2.5°C | °C |
| Package | MSOP-10 | |
| Operating Temperature | −40°C to +120°C | °C |
Key Features
Multi-Channel Temperature Measurement: The ADT7481ARMZ-REEL can measure temperatures on three channels: one local and two remote channels.
Programmable Limits: The device allows for setting high and low temperature limits, and it can generate alerts when these limits are exceeded.
SMBus Interface: It uses the SMBus protocol for communication, enabling easy integration into systems that support this standard.
Extended Temperature Range: By setting a specific configuration bit, the temperature measurement range can be extended from 0°C to +127°C to −64°C to +191°C.
Standby Mode: The device can operate in a standby mode to reduce power consumption while still maintaining critical temperature monitoring functions.
Alert and Therm Outputs: It features ALERT and THERM outputs that can be configured to indicate temperature limit violations or other conditions.
Applications
PCs and Servers: Ideal for thermal management in personal computers and servers to monitor CPU, GPU, and other critical component temperatures.
Industrial Automation: Used in industrial automation systems to monitor temperatures of motors, pumps, and other equipment.
Medical Devices: Suitable for medical devices that require precise temperature monitoring, such as in patient monitoring systems or medical imaging equipment.
Automotive Systems: Can be used in automotive systems for engine temperature monitoring and other thermal management applications.
Q & A
- What is the primary function of the ADT7481ARMZ-REEL?
The primary function is to measure temperatures on three channels (one local and two remote) and provide under/over temperature alarms.
- What is the default temperature measurement range for the local sensor?
The default temperature measurement range for the local sensor is 0°C to +127°C.
- Can the temperature measurement range be extended?
- What communication protocol does the ADT7481ARMZ-REEL use?
The device uses the SMBus protocol for communication.
- What are the ALERT and THERM outputs used for?
The ALERT and THERM outputs are used to indicate when temperature limits are exceeded or other specified conditions are met.
- What is the package type of the ADT7481ARMZ-REEL?
The package type is MSOP-10.
- What is the operating temperature range of the device?
The operating temperature range is −40°C to +120°C.
- Does the device support standby mode?
- How accurate is the local temperature measurement?
The local temperature measurement accuracy is ±1°C.
- How accurate are the remote temperature measurements?
The remote temperature measurements have an accuracy of ±2.5°C.
