Overview
The ADT7461ARMZ-2RL7, 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 advanced features for precise temperature monitoring. The device is pin- and register-compatible with the ADM1032, making it a versatile option for various applications. It includes on-chip and remote temperature sensors, series resistance cancellation, and configurable ALERT and THERM outputs. This component is particularly useful in environments where accurate temperature measurement and alarm functions are critical.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | 8-lead MSOP |
| 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), –55°C to +150°C (extended) |
| 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) |
| Interface Type | 2-wire SMBus serial interface |
| SMBus Address | 0x4C |
| Maximum Storage Temperature | -55°C to +150°C |
Key Features
- On-chip and remote temperature sensors with high accuracy
- Series resistance cancellation up to 3 kΩ (typical) for noise filtering
- Extended, switchable temperature measurement range (0°C to +127°C or –55°C to +150°C)
- Configurable ALERT output and THERM output for fan control
- 2-wire SMBus serial interface with SMBus alert support
- Pin- and register-compatible with the ADM1032
- Programmable over/under temperature limits and offset registers for system calibration
- Small 8-lead SOIC NB or 8-lead MSOP packages
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Embedded systems
- Instrumentation
Q & A
- What is the primary function of the ADT7461ARMZ-2RL7?
The ADT7461ARMZ-2RL7 is a dual-channel digital thermometer and under/over temperature alarm designed for use in PCs and thermal management systems.
- What is the temperature measurement range of the ADT7461ARMZ-2RL7?
The temperature measurement range defaults to 0°C to +127°C but can be switched to an extended range of –55°C to +150°C.
- How does the ADT7461ARMZ-2RL7 handle series resistance in temperature measurements?
The device can automatically cancel up to 3 kΩ (typical) of resistance in series with the temperature monitoring diode to allow noise filtering.
- What interface does the ADT7461ARMZ-2RL7 use for communication?
The device communicates over a 2-wire serial interface compatible with system management bus (SMBus) standards.
- What is the SMBus address of the ADT7461ARMZ-2RL7?
The SMBus address is 0x4C.
- Can the ALERT output be reconfigured?
Yes, the ALERT output can be reconfigured as a second THERM output if required.
- What are the typical operating currents for the ADT7461ARMZ-2RL7?
The typical operating current is 170 μA, and the standby current is 5.5 μA.
- Is the ADT7461ARMZ-2RL7 compatible with other devices?
Yes, it is pin- and register-compatible with the ADM1032.
- What are some common applications of the ADT7461ARMZ-2RL7?
Common applications include desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and instrumentation.
- Is the ADT7461ARMZ-2RL7 RoHS compliant?
Yes, the device is RoHS compliant according to EU RoHS regulations (2011/65/EU, 2015/863).
