Overview
The ADT7481ARMZ-REEL7, produced by onsemi, is a 3-channel digital thermometer designed for use in PCs and thermal management systems. This device is capable of measuring its own local temperature as well as the temperatures of two remote diodes. It also features under/over temperature alarm functions, making it a versatile component for monitoring and managing thermal conditions in various electronic systems.
Key Specifications
| Parameter | Rating/Value | Unit |
|---|---|---|
| Positive Supply Voltage (VDD) to GND | −0.3 to +3.6 | V |
| D+ to GND | −0.3 to VDD + 0.3 | V |
| D− to GND | −0.3 to +0.6 | V |
| SCLK, SDATA, ALERT, THERM | −0.3 to +3.6 | V |
| Input Current, SDATA, THERM | −1 to +50 | mA |
| Temperature Measurement Range (Default) | 0°C to +127°C | °C |
| Extended Temperature Measurement Range | −64°C to +191°C | °C |
| Conversion Rate | 15.5 ms to 16 seconds | ms/s |
| Package Type | 10-MSOP |
Key Features
- 3-channel digital thermometer: Measures local and two remote temperatures.
- Under/over temperature alarm functions: Provides alerts for temperature limits.
- Programmable conversion rates: From 15.5 ms to 16 seconds, with options for continuous measurements.
- Extended temperature measurement range: Up to −64°C to +191°C when enabled.
- SMBus interface: Supports communication for configuration and data retrieval.
- Configuration and control registers: Allows for detailed setup and management of the device.
- Low power consumption: Especially at slower conversion rates.
- Alert masking: Option to mask alerts for specific temperature channels.
- Lockable registers: Prevents tampering with settings until power-down.
Applications
- PCs and laptops: For thermal management and monitoring.
- Thermal management systems: In various industrial and consumer electronics.
- Server systems: To monitor and control temperatures in data centers.
- Automotive systems: For temperature monitoring in automotive electronics.
- Industrial control systems: For temperature monitoring and alarm functions.
Q & A
- What is the primary function of the ADT7481ARMZ-REEL7?
The ADT7481ARMZ-REEL7 is a 3-channel digital thermometer that measures local and remote temperatures and provides under/over temperature alarm functions.
- What is the default temperature measurement range of the ADT7481ARMZ-REEL7?
The default temperature measurement range is 0°C to +127°C.
- Can the temperature measurement range be extended?
Yes, the temperature measurement range can be extended to −64°C to +191°C by setting a specific bit in the configuration register.
- What interface does the ADT7481ARMZ-REEL7 use for communication?
The ADT7481ARMZ-REEL7 uses the SMBus interface for communication.
- How can the conversion rate of the ADT7481ARMZ-REEL7 be adjusted?
The conversion rate can be adjusted using the conversion rate/channel selector register, allowing rates from 15.5 ms to 16 seconds.
- Does the ADT7481ARMZ-REEL7 support continuous temperature measurements?
Yes, the device can be configured to perform continuous measurements by setting the conversion rate register accordingly.
- Can alerts be masked for specific temperature channels?
Yes, alerts can be masked for the remote temperature channels by setting specific bits in the configuration register.
- How can the settings of the ADT7481ARMZ-REEL7 be protected from tampering?
The settings can be locked by setting the lock bit in the configuration register, preventing changes until the device is powered down.
- What is the package type of the ADT7481ARMZ-REEL7?
The package type is 10-MSOP.
- In what types of systems is the ADT7481ARMZ-REEL7 commonly used?
The ADT7481ARMZ-REEL7 is commonly used in PCs, laptops, server systems, automotive systems, and industrial control systems for thermal management and monitoring.
