Overview
The ADT7461ARMZ, produced by onsemi, is a dual-channel digital thermometer and under/over temperature alarm designed for use in PCs and thermal management systems. It is pin- and register-compatible with the ADM1032, making it a versatile component for various applications. The device features on-chip and remote temperature sensing, series resistance cancellation, and an extended, switchable temperature measurement range, making it highly suitable for thermal management in computing and industrial environments.
Key Specifications
| Specification | Value |
|---|---|
| Temperature Resolution (Remote Channel) | 0.25°C |
| Temperature Accuracy (Remote Channel) | 1°C |
| Temperature Resolution (Local Channel) | 1°C |
| Temperature Accuracy (Local Channel) | 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 |
| Interface | 2-wire SMBus |
| SMBus Address | 0x4C |
| Operating Current | 170 µA |
| Standby Current | 5.5 µA |
| Package Types | 8-lead SOIC NB or 8-lead MSOP |
Key Features
- On-chip and remote temperature sensor
- Automatically cancels up to 3 kΩ (typical) of resistance in series with the remote diode for noise filtering
- Extended, switchable temperature measurement range (0°C to +127°C or –55°C to +150°C)
- Programmable over/under temperature limits
- Up to two overtemperature fail-safe THERM outputs
- Configurable ALERT output that can be reprogrammed as a second THERM output
- Offset registers for system calibration
- Low operating and standby current (170 µA and 5.5 µA respectively)
Applications
- Desktop and notebook computers
- Industrial controllers
- Smart batteries
- Embedded systems
- Instrumentation
- Game consoles
- DSL line cards
- RFID readers
Q & A
- What is the primary function of the ADT7461ARMZ? The ADT7461ARMZ is a dual-channel digital thermometer and under/over temperature alarm.
- What are the temperature resolution and accuracy for the remote channel? The temperature resolution is 0.25°C, and the accuracy is 1°C.
- What is the series resistance cancellation capability of the ADT7461ARMZ? It can automatically cancel up to 3 kΩ (typical) of resistance in series with the remote diode.
- What are the possible temperature measurement ranges for the ADT7461ARMZ? The ranges are 0°C to +127°C (default) or –55°C to +150°C.
- What type of interface does the ADT7461ARMZ use? It uses a 2-wire SMBus interface.
- What is the SMBus address of the ADT7461ARMZ? The SMBus address is 0x4C.
- What are the operating and standby currents of the ADT7461ARMZ? The operating current is 170 µA, and the standby current is 5.5 µA.
- In what package types is the ADT7461ARMZ available? It is available in 8-lead SOIC NB and 8-lead MSOP packages.
- Can the ALERT output be reconfigured? Yes, the ALERT output can be reprogrammed as a second THERM output.
- What are some common applications of the ADT7461ARMZ? Common applications include desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and instrumentation.
