Overview
The ADT7481ARMZ-1R7, produced by onsemi, is a dual-channel digital thermometer designed for precise temperature measurement and over/under temperature alarm functions. This device is particularly suited for use in PCs and thermal management systems. It features a local temperature sensor and two remote temperature sensors, providing comprehensive thermal monitoring capabilities.
Key Specifications
| Parameter | Rating/Value | Unit |
|---|---|---|
| Positive Supply Voltage (VDD) to GND | −0.3 to +3.6 | V |
| Sensing Temperature - Local | 0°C ~ 127°C (default), −64°C ~ 191°C (extended) | °C |
| Sensing Temperature - Remote | −64°C ~ 191°C | °C |
| Output Type | SMBus | |
| Voltage - Supply | 3 V ~ 3.6 V | V |
| Accuracy - Highest (Lowest) | ±1°C (±2.5°C) | °C |
| Operating Temperature | −40°C ~ 120°C | °C |
| Mounting Type | Surface Mount | |
| Package / Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
Key Features
- Dual-channel temperature measurement with one local and two remote sensors.
- Programmable temperature limits and alarms.
- Support for one-shot and continuous temperature measurements.
- Configurable conversion rates from 15.5 ms to 16 seconds.
- Optional averaging of temperature measurements.
- Standby mode for power reduction.
- SMBus interface for communication.
- Lockable registers to prevent tampering.
Applications
The ADT7481ARMZ-1R7 is primarily used in PCs and thermal management systems. It is also suitable for various industrial and consumer electronics applications where precise temperature monitoring and alarm functions are required.
Q & A
- What is the default temperature measurement range of the ADT7481ARMZ-1R7? The default temperature measurement range is 0°C to +127°C, but it can be extended to −64°C to +191°C by setting a specific bit in the configuration register.
- How many temperature channels does the ADT7481ARMZ-1R7 support? It supports one local and two remote temperature channels.
- What is the communication interface used by the ADT7481ARMZ-1R7? The device uses the SMBus interface for communication.
- Can the conversion rate of the ADT7481ARMZ-1R7 be configured? Yes, the conversion rate can be configured from 15.5 ms to 16 seconds.
- Does the ADT7481ARMZ-1R7 support standby mode? Yes, it supports a standby mode to reduce power consumption.
- What is the accuracy of the temperature measurements? The accuracy is ±1°C (±2.5°C) under specified test conditions.
- What type of package is the ADT7481ARMZ-1R7 available in? It is available in 10-TFSOP and 10-MSOP packages.
- Can the registers of the ADT7481ARMZ-1R7 be locked to prevent tampering? Yes, the registers can be locked by setting a specific bit in the configuration register.
- Is the ADT7481ARMZ-1R7 still in production? No, the ADT7481ARMZ-1R7 is listed as obsolete and is no longer manufactured.
- What are some common applications of the ADT7481ARMZ-1R7? It is commonly used in PCs and thermal management systems, as well as in various industrial and consumer electronics applications.
