Overview
The ADT7461AARMZ-002, produced by onsemi, is a dual-channel digital thermometer and under/over temperature alarm. It is designed for use in various thermal management systems, including PCs, industrial controllers, and embedded systems. This component is pin- and register-compatible with the ADM1032 and ADT7461, making it a versatile choice for temperature monitoring and control.
The ADT7461AARMZ-002 features advanced capabilities such as series resistance cancellation, which allows it to automatically cancel up to 1.5 kΩ (typical) of resistance in series with the temperature monitoring diode, thereby enhancing noise filtering and accuracy.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage, VDD | 3.0 | 3.30 | 5.5 | V |
| Average Operating Supply Current, IDD | - | 170 | 215 | μA |
| Standby Mode Current | - | 5 | 10 | μA |
| Undervoltage Lockout Threshold | 2.2 | 2.55 | 2.8 | V |
| Power-On-Reset Threshold | 1.0 | - | 2.5 | V |
| Local Sensor Accuracy | - | ±1°C | - | °C |
| Remote Sensor Accuracy | - | ±1°C | - | °C |
| Temperature Measurement Range (Default) | 0°C | - | +127°C | °C |
| Extended Temperature Measurement Range | −64°C | - | +191°C | °C |
| Resolution (Local) | - | 1°C | - | °C |
| Resolution (Remote) | - | 0.25°C | - | °C |
| SMBus Address | - | 0x4C | - | - |
Key Features
- On-Chip and Remote Temperature Sensor
- 0.25°C Resolution/1°C Accuracy on Remote Channel
- 1°C Resolution/1°C Accuracy on Local Channel
- Automatically Cancels Up to 1.5 kΩ (Typ) of Resistance in Series with Remote Diode to Allow Noise Filtering
- Extended, Switchable Temperature Measurement Range: 0°C to +127°C (Default) or –64°C to +191°C
- Pin- and Register-Compatible with ADM1032 and ADT7461
- 2-wire SMBus Serial Interface with SMBus Alert Support
- Programmable Over/Undertemperature Limits
- Offset Registers for System Calibration
- Up to Two Overtemperature Fail-Safe THERM Outputs
- Small 8-lead MSOP Package
- 240 μA Operating Current, 5 μA Standby Current
- Pb-Free Devices
Applications
- Desktop and Notebook Computers
- Industrial Controllers
- Smart Batteries
- Embedded Systems
- Automotive Systems
- Burn-In Applications
- Instrumentation
- Game Consoles
- Graphics Cards
- LCD TVs
- Dishwashers
- RFID Readers
Q & A
- What is the primary function of the ADT7461AARMZ-002?
The ADT7461AARMZ-002 is a dual-channel digital thermometer and under/over temperature alarm designed for thermal management in various systems.
- What is the series resistance cancellation feature?
This feature allows the device to automatically cancel up to 1.5 kΩ (typical) of resistance in series with the temperature monitoring diode, enhancing noise filtering and accuracy.
- What are the default and extended temperature measurement ranges?
The default range is 0°C to +127°C, and the extended range is –64°C to +191°C.
- What is the resolution and accuracy of the remote temperature sensor?
The remote temperature sensor has a resolution of 0.25°C and an accuracy of ±1°C.
- What is the SMBus address of the ADT7461AARMZ-002?
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 operating and standby current consumptions?
The operating current is 240 μA, and the standby current is 5 μA.
- Is the ADT7461AARMZ-002 Pb-free?
Yes, the ADT7461AARMZ-002 is a Pb-free device.
- What are some common applications of the ADT7461AARMZ-002?
Common applications include desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and automotive systems.
- How does the device communicate with the system?
The device communicates over a 2-wire SMBus serial interface compatible with system management bus (SMBus) standards.
