Overview
The ADT7461AR, produced by Analog Devices Inc., is a dual-channel digital thermometer designed for precise temperature monitoring and alarm functions. It is pin- and register-compatible with the ADM1032 and features advanced capabilities such as series resistance cancellation, programmable over/under temperature limits, and configurable ALERT outputs. This device is particularly suited for applications requiring accurate temperature measurement and control in various environments.
Key Specifications
| Parameter | Value |
|---|---|
| Temperature Measurement Range | 0°C to +127°C (default) or –55°C to +150°C (extended range) |
| Operating Current | Typically 170 μA |
| Standby Current | Typically 5.5 μA |
| Supply Voltage | 2.7 V to 5.5 V |
| Package Type | 8-lead SOIC or 8-lead MSOP |
| SMBus Address | 0x4C (ADT7461), 0x4D (ADT7461-2) |
| Series Resistance Cancellation | Up to 3 kΩ (typical) |
| ALERT Output Configuration | Configurable as ALERT or THERM2 output |
Key Features
- Dual-channel digital thermometer for local and remote temperature measurement
- Series resistance cancellation to minimize noise and improve accuracy
- Programmable over/under temperature limits and THERM outputs
- Configurable ALERT output that can be reprogrammed as a second THERM output
- Two SMBus address versions available (0x4C and 0x4D)
- Low operating current and standby current for power efficiency
- Support for SMBus alert and packet error checking (PEC)
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Embedded systems
- Instrumentation and thermal management systems
Q & A
- What is the operating temperature range of the ADT7461AR?
The ADT7461AR operates over a temperature range of 0°C to +127°C (default) or –55°C to +150°C (extended range). - What is the typical operating current of the ADT7461AR?
The typical operating current is 170 μA. - What are the package options for the ADT7461AR?
The device is available in 8-lead SOIC or 8-lead MSOP packages. - How does the series resistance cancellation feature work?
The series resistance cancellation feature allows for the automatic cancellation of up to 3 kΩ (typical) of resistance in series with the temperature monitoring diode, improving measurement accuracy. - Can the ALERT output be configured?
Yes, the ALERT output can be configured as either an ALERT or a THERM2 output. - What is the purpose of the THERM outputs?
The THERM outputs are used to indicate when the temperature exceeds programmable critical temperature limits. - How is the device controlled and configured?
The device is controlled and configured via the SMBus serial interface. - What are some common applications of the ADT7461AR?
Common applications include desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and instrumentation. - Does the ADT7461AR support SMBus alert and packet error checking?
Yes, the device supports SMBus alert and packet error checking (PEC). - What is the standby current of the ADT7461AR?
The typical standby current is 5.5 μA.
