Overview
The ADT7461ARMZ-2R, produced by onsemi, is a dual-channel digital thermometer and under/over temperature alarm. It is designed for use in PCs and thermal management systems, offering compatibility with the ADM1032 in terms of pin and register configuration. This device features advanced temperature sensing capabilities, including on-chip and remote temperature measurement, and is particularly useful in environments requiring precise thermal monitoring and control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 3.0 to 5.5 | V |
| Average Operating Supply Current (IDD) | 170 | µA |
| Standby Current | 5.5 | µA |
| Remote Channel Resolution/Accuracy | 0.25°C / ±1°C | |
| Local Channel Resolution/Accuracy | 1°C / ±3°C | |
| Series Resistance Cancellation | Up to 3 kΩ (typical) | |
| Temperature Measurement Range | 0°C to +127°C (default) or –55°C to +150°C | |
| SMBus Address | 0x4C (ADT7461), 0x4D (ADT7461-2) | |
| Package Type | 8-lead SOIC or 8-lead MSOP |
Key Features
- On-chip and remote temperature sensor
- 0.25°C resolution and ±1°C accuracy on remote channel, 1°C resolution and ±3°C accuracy on local channel
- Automatically cancels up to 3 kΩ (typical) of resistance in series with remote diode for noise filtering
- Extended, switchable temperature measurement range: 0°C to +127°C (default) or –55°C to +150°C
- Pin- and register-compatible with the ADM1032
- 2-wire SMBus serial interface with SMBus alert support
- Programmable over/under temperature limits
- Offset registers for system calibration
- Up to two overtemperature fail-safe THERM outputs
- Configurable ALERT output that can be reconfigured as a second THERM output
- Pb-free devices
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Embedded systems
- Instrumentation
- Game consoles
- RFID readers
- DSL line cards
Q & A
- What is the primary function of the ADT7461?
The ADT7461 is a dual-channel digital thermometer and under/over temperature alarm designed for use in PCs and thermal management systems.
- What are the temperature measurement ranges of the ADT7461?
The ADT7461 can measure temperatures in two ranges: 0°C to +127°C (default) and –55°C to +150°C (extended range).
- How does the ADT7461 communicate with other devices?
The ADT7461 communicates over a 2-wire serial interface compatible with system management bus (SMBus) standards.
- What is the purpose of the ALERT output on the ADT7461?
The ALERT output signals when the on-chip or remote temperature is out of range and can be reconfigured as a second THERM output if required.
- What is the series resistance cancellation feature of the ADT7461?
The ADT7461 can automatically cancel up to 3 kΩ (typical) of resistance in series with the remote diode to allow noise filtering.
- What are the power consumption characteristics of the ADT7461?
The ADT7461 has an operating current of 170 µA and a standby current of 5.5 µA.
- What are the common applications of the ADT7461?
The ADT7461 is commonly used in desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and instrumentation.
- Is the ADT7461 Pb-free?
Yes, the ADT7461 is a Pb-free device.
- What are the package options for the ADT7461?
The ADT7461 is available in 8-lead SOIC and 8-lead MSOP packages.
- How can the temperature limits be set on the ADT7461?
The temperature limits can be programmed and the device controlled and configured via the serial SMBus interface.
