Overview
The ADT7461AARMZ from onsemi is a dual-channel digital thermometer designed for precise temperature monitoring and thermal management. This component is part of the temperature and humidity sensors category and is available in an 8-pin MSOP package. It is pin- and register-compatible with the ADM1032, making it a versatile option for various applications. The ADT7461AARMZ is particularly useful in systems requiring accurate temperature measurement and alarm functions, such as PCs, industrial controllers, and embedded systems.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | 8-pin MSOP |
| Interface Type | 2-wire SMBus |
| Operating Supply Voltage | 3.0 V to 5.5 V |
| Operating Current | 170 μA (typical) |
| Standby Current | 5.5 μA (typical) |
| Temperature Measurement Range | 0°C to +127°C (default), switchable to −55°C to +150°C |
| Resolution and Accuracy | 0.25°C resolution / 1°C accuracy (remote), 1°C resolution / 3°C accuracy (local) |
| Series Resistance Cancellation | Up to 3 kΩ (typical) |
| SMBus Address | 0x4C |
Key Features
- On-chip and remote temperature sensing with high accuracy
- Extended, switchable temperature measurement range (0°C to +127°C or −55°C to +150°C)
- Automatically cancels up to 3 kΩ of series resistance for noise filtering
- Configurable ALERT output and THERM output for over/under temperature alarms
- Pin- and register-compatible with the ADM1032
- 2-wire SMBus serial interface with SMBus alert support
- Programmable over/under temperature limits and offset registers for system calibration
- Low power consumption with 170 μA operating current and 5.5 μA standby current
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Embedded systems
- Instrumentation
- Automotive and aerospace systems
- Healthcare and industrial automation
- Consumer electronics
Q & A
- What is the primary function of the ADT7461AARMZ?
The ADT7461AARMZ is a dual-channel digital thermometer and under/over temperature alarm designed for precise temperature monitoring and thermal management.
- What is the temperature measurement range of the ADT7461AARMZ?
The default temperature measurement range is 0°C to +127°C, but it can be switched to a wider range of −55°C to +150°C.
- What interface does the ADT7461AARMZ use for communication?
The ADT7461AARMZ communicates over a 2-wire SMBus serial interface.
- What is the series resistance cancellation feature of the ADT7461AARMZ?
The ADT7461AARMZ can automatically cancel up to 3 kΩ of series resistance in series with the temperature monitoring diode to allow noise filtering.
- What are the typical operating and standby currents of the ADT7461AARMZ?
The typical operating current is 170 μA, and the standby current is 5.5 μA.
- Is the ADT7461AARMZ compatible with other devices?
Yes, it is pin- and register-compatible with the ADM1032.
- What are the key outputs of the ADT7461AARMZ?
The key outputs include the ALERT output for temperature alarms and the THERM output for controlling cooling fans.
- Can the ALERT output be reconfigured?
Yes, the ALERT output can be reprogrammed as a second THERM output if required.
- What are some common applications of the ADT7461AARMZ?
Common applications include desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and instrumentation.
- Is the ADT7461AARMZ RoHS compliant?
Yes, the ADT7461AARMZ is RoHS compliant according to EU RoHS Version 2011/65/EU, 2015/863.
