Overview
The ADT7461AARMZ-REEL7, 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 and offers advanced features such as series resistance cancellation, configurable ALERT output, and an extended, switchable temperature measurement range. The device accurately measures the temperature of a remote thermal diode to ±1°C and the ambient temperature to ±3°C, making it suitable for various applications requiring precise temperature monitoring.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Positive Supply Voltage (VDD) to GND | -0.3 | - | +5.5 | V |
| Operating Current | - | 170 | - | μA |
| Standby Current | - | 5.5 | - | μA |
| Temperature Measurement Range (Default) | 0°C | - | +127°C | - |
| Extended Temperature Measurement Range | -55°C | - | +150°C | - |
| Remote Channel Accuracy | - | ±1°C | - | - |
| Local Channel Accuracy | - | ±3°C | - | - |
| Series Resistance Cancellation | - | Up to 3 kΩ (Typ) | - | - |
| SMBus Address | - | 0x4C (0x4D for ADT7461-2) | - | - |
Key Features
- On-Chip and Remote Temperature Sensor
- 0.25°C Resolution/1°C Accuracy on Remote Channel
- 1°C Resolution/3°C Accuracy on Local Channel
- Automatically Cancels Up to 3 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 –55°C to +150°C
- Pin- and Register-Compatible with the ADM1032
- 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 SOIC NB or 8-lead MSOP Packages
- Pb-Free Devices
Applications
- Desktop and Notebook Computers
- Industrial Controllers
- Smart Batteries
- Embedded Systems
- Instrumentation
Q & A
- What is the primary function of the ADT7461AARMZ-REEL7?
The ADT7461AARMZ-REEL7 is a dual-channel digital thermometer and under/over temperature alarm designed for use in PCs and thermal management systems.
- What is the accuracy of the remote temperature measurement?
The remote temperature measurement accuracy is ±1°C.
- What is the default temperature measurement range?
The default temperature measurement range is 0°C to +127°C.
- Can the temperature measurement range be extended?
- How does the series resistance cancellation feature work?
The device can automatically cancel up to 3 kΩ (typical) of resistance in series with the remote diode to allow noise filtering.
- What is the SMBus address of the ADT7461AARMZ-REEL7?
The SMBus address is 0x4C (0x4D for the ADT7461-2 version).
- What are the package options for the ADT7461AARMZ-REEL7?
The device is available in small 8-lead SOIC NB or 8-lead MSOP packages.
- Is the ADT7461AARMZ-REEL7 Pb-free?
- What are some typical applications of the ADT7461AARMZ-REEL7?
Typical applications include desktop and notebook computers, industrial controllers, smart batteries, embedded systems, and instrumentation.
- How is the ALERT output configured?
The ALERT output can be reconfigured as a second THERM output if required, and it can also be masked or enabled via the configuration register.
