Overview
The ADT7461AARMZ-2RL, produced by onsemi, is a dual-channel digital thermometer designed for precise temperature monitoring and over/under temperature alarm functions. It is particularly suited for use in PCs, thermal management systems, and various industrial applications. This device is pin- and register-compatible with the ADM1032 and ADT7461, making it a versatile option for system designers. The ADT7461AARMZ-2RL features advanced temperature measurement capabilities, including series resistance cancellation, which enhances accuracy in noisy environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Temperature Measurement Range | 0°C to +127°C (default), −64°C to +191°C (extended) | °C |
| Remote Temperature Accuracy | ±1°C | °C |
| Local Temperature Accuracy | ±3°C | °C |
| Resolution | 0.25°C (remote), 1°C (local) | °C |
| Series Resistance Cancellation | Up to 1.5 kΩ (typical) | kΩ |
| Supply Voltage | 3.0 to 3.6 V | V |
| Operating Current | 240 μA (active), 5 μA (standby) | μA |
| Interface | 2-wire SMBus | - |
| SMBus Address | 0x4D (for ADT7461A-2) | - |
| Package | 8-lead MSOP | - |
Key Features
- On-Chip and Remote Temperature Sensor
- Automatically Cancels Up to 1.5 kΩ of Resistance in Series with Remote Diode for Noise Filtering
- Extended, Switchable Temperature Measurement Range (0°C to +127°C or −64°C to +191°C)
- Pin- and Register-Compatible with ADM1032 and ADT7461
- 2-wire SMBus Serial Interface with SMBus Alert Support
- Programmable Over/Undertemperature Limits
- Offset Registers for System Calibration
- Up to Two Overtemperature Fail-Safe THERM Outputs
- Low Power Consumption (240 μA active, 5 μA standby)
Applications
- Desktop and Notebook Computers
- Industrial Controllers
- Smart Batteries
- Automotive Systems
- Embedded Systems
- Burn-In Applications
- Instrumentation
Q & A
- What is the default temperature measurement range of the ADT7461AARMZ-2RL?
The default temperature measurement range is 0°C to +127°C, but it can be switched to an extended range of −64°C to +191°C. - How does the ADT7461AARMZ-2RL handle series resistance in temperature measurements?
The device automatically cancels up to 1.5 kΩ of series resistance to improve accuracy. - What is the resolution and accuracy of the remote temperature sensor?
The resolution is 0.25°C, and the accuracy is ±1°C. - What interface does the ADT7461AARMZ-2RL use for communication?
The device uses a 2-wire SMBus serial interface. - Can the ADT7461AARMZ-2RL be used in multiple device configurations on the same SMBus?
- What are the power consumption characteristics of the ADT7461AARMZ-2RL?
The device consumes 240 μA in active mode and 5 μA in standby mode.- How does the ALERT output function in the ADT7461AARMZ-2RL?
The ALERT output signals when the on-chip or remote temperature is out of range and can be reconfigured as a second THERM output.- What types of applications is the ADT7461AARMZ-2RL suited for?
The device is suited for desktop and notebook computers, industrial controllers, smart batteries, automotive systems, embedded systems, and more.- How is the temperature measurement range switched on the ADT7461AARMZ-2RL?
The temperature measurement range is switched by setting Bit 2 of the configuration register to 1 for the extended range.- What is the purpose of the THERM output in the ADT7461AARMZ-2RL?
The THERM output allows on/off control of a cooling fan and can be configured as a second THERM output if needed. - What are the power consumption characteristics of the ADT7461AARMZ-2RL?
