Overview
The ADT7461AARMZ-2RL7 from onsemi is a dual-channel digital thermometer designed for precise temperature monitoring and thermal management. This component is particularly suited for applications in PCs, industrial controllers, smart batteries, and embedded systems. It features both local and remote temperature sensing capabilities, making it versatile for various thermal management needs.
The device operates over a 2-wire serial interface compatible with the System Management Bus (SMBus) standards, allowing for easy integration into existing systems. It includes advanced features such as series resistance cancellation, configurable ALERT and THERM outputs, and an extended, switchable temperature measurement range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Positive Supply Voltage (VDD) to GND | −0.3 to +3.6 | V |
| Operating Supply Voltage | 3.0 to 3.6 | V |
| Average Operating Supply Current | 170 μA (typical) | μA |
| Standby Current | 5.5 μA (typical) | μA |
| Local Temperature Sensing Range | −40°C to +120°C | °C |
| Remote Temperature Sensing Range | −64°C to +191°C | °C |
| Local Sensor Accuracy | ±1°C to ±3°C | °C |
| Remote Diode Sensor Accuracy | ±1°C | °C |
| Resolution | 0.25°C (remote), 1°C (local) | °C |
| Package Type | 8-lead MSOP | |
| Interface Type | SMBus (2-wire serial interface) | |
| Storage Temperature Range | −65°C to +150°C | °C |
Key Features
- Local and Remote Temperature Sensing: Measures both local and remote temperatures with high accuracy.
- Series Resistance Cancellation: Automatically cancels up to 3 kΩ of resistance in series with the temperature monitoring diode to allow noise filtering.
- Configurable ALERT and THERM Outputs: ALERT output can be reprogrammed as a second THERM output, and THERM output allows on/off control of a cooling fan.
- Switchable Temperature Measurement Range: Defaults to 0°C to +127°C, but can be switched to an extended range of −55°C to +150°C.
- Programmable Over/Undertemperature Limits: Allows setting of high, low, and THERM temperature limits stored in on-chip registers.
- Standby Mode: Low power consumption in standby mode with ALERT and THERM outputs still active.
- SMBus Compatibility: Communicates over a 2-wire serial interface compatible with SMBus standards.
- Pb-Free and RoHS Compliant: Lead-free and compliant with RoHS regulations.
Applications
- Desktop and Notebook Computers: For thermal management and monitoring.
- Industrial Controllers: For precise temperature control in industrial environments.
- Smart Batteries: To monitor and manage battery temperatures.
- Embedded Systems: For various applications requiring accurate temperature monitoring.
- Instrumentation: In scientific and industrial instruments where precise temperature measurement is crucial.
Q & A
- What is the primary function of the ADT7461AARMZ-2RL7?
The ADT7461AARMZ-2RL7 is a dual-channel digital thermometer and over/under temperature alarm designed for precise temperature monitoring and thermal management.
- What are the temperature sensing ranges for local and remote measurements?
The local temperature sensing range is −40°C to +120°C, and the remote temperature sensing range is −64°C to +191°C.
- What is the resolution and accuracy of the temperature measurements?
The resolution is 0.25°C for remote measurements and 1°C for local measurements. The accuracy is ±1°C for remote and ±1°C to ±3°C for local measurements.
- How does the series resistance cancellation feature work?
The device can automatically cancel up to 3 kΩ of resistance in series with the temperature monitoring diode to allow noise filtering.
- What is the purpose of the ALERT and THERM outputs?
The ALERT output signals when the temperature is out of range, and the THERM output allows on/off control of a cooling fan. The ALERT output can also be reprogrammed as a second THERM output.
- What interface does the ADT7461AARMZ-2RL7 use for communication?
The device communicates over a 2-wire serial interface compatible with SMBus standards.
- Is the ADT7461AARMZ-2RL7 Pb-free and RoHS compliant?
- What are the typical operating and standby current values?
The typical operating current is 170 μA, and the standby current is 5.5 μA.
- What are some common applications of the ADT7461AARMZ-2RL7?
- What is the storage temperature range for the ADT7461AARMZ-2RL7?
