Overview
The ADT7481ARMZ-1, produced by onsemi, is a 3-channel digital thermometer and under/over temperature alarm. It is designed for use in PCs and thermal management systems, allowing it to measure its own ambient temperature as well as the temperature of two remote thermal diodes. These diodes can be located in CPUs, GPUs, or as discrete diode-connected transistors. The device communicates via a 2-wire serial interface compatible with system management bus (SMBus) standards and features an active-low ALERT output to signal when temperatures exceed programmed limits.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution (Remote Channels) | 0.25°C |
| Accuracy (Remote Channels) | ±1°C |
| Resolution (Local Channel) | 1°C |
| Accuracy (Local Channel) | ±1°C |
| Interface | 2-wire SMBus |
| Supply Voltage (Typical) | 3.3V |
| Average Operating Supply Current | 3mA (at 0.0625 conversions/sec rate) |
| Storage Temperature Range | -65°C to 150°C |
| Package Type | 10-lead MSOP |
| Number of Channels | 3 |
| Temperature Range | 0°C to 127°C |
Key Features
- Programmable over/under temperature limits
- Offset registers for system calibration
- Up to 2 overtemperature fail-safe active-low THERM outputs
- Active-low ALERT output for temperature alerts
- Support for remote and local temperature measurement
- Compatibility with SMBus standards
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Automotive systems
- Embedded systems
- Burn-in applications
- Instrumentation
Q & A
- What is the primary function of the ADT7481ARMZ-1? The ADT7481ARMZ-1 is a 3-channel digital thermometer and under/over temperature alarm.
- What types of temperature can it measure? It can measure its own ambient temperature and the temperature of two remote thermal diodes.
- What is the resolution and accuracy of remote channels? The resolution is 0.25°C and the accuracy is ±1°C.
- What interface does it use for communication? It uses a 2-wire SMBus serial interface.
- What is the typical supply voltage? The typical supply voltage is 3.3V.
- What is the average operating supply current? The average operating supply current is 3mA at a conversion rate of 0.0625 conversions/sec.
- What is the storage temperature range? The storage temperature range is from -65°C to 150°C.
- What type of package does it come in? It comes in a 10-lead MSOP package.
- What are some of its key features? It includes programmable over/under temperature limits, offset registers for system calibration, and up to 2 overtemperature fail-safe active-low THERM outputs.
- In what applications is it commonly used? It is commonly used in desktop and notebook computers, industrial controllers, smart batteries, automotive systems, embedded systems, and burn-in applications.
