Overview
The ADT7462ACPZ-REEL7, produced by onsemi, is a highly versatile system monitor IC designed for a wide range of applications. This component integrates multiple functionalities, including temperature monitoring, voltage monitoring, and system fan control. It can monitor temperature in up to three remote locations as well as its ambient temperature. The ADT7462 supports high-frequency PWM for 4-wire fans and low-frequency PWM for 2-wire and 3-wire fans, making it suitable for various cooling systems. Additionally, it includes up to eight TACH inputs for measuring fan speeds and up to 13 voltage monitoring inputs, ranging from 12 V to 0.9 V.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Supply Voltage | 3.0 | 3.3 | 5.5 | V | |
| Supply Current (ICC) | 1.5 | 4.0 | mA | ADC Active, Interface Inactive | |
| Internal Sensor Temperature Accuracy | ±0.5 | °C | 0°C ≤ TA ≤ 85°C, 3 V ≤ VCC ≤ 3.6 V | ||
| Remote Sensor Temperature Accuracy | ±2.25 | °C | 0°C ≤ TA ≤ 85°C, 3 V ≤ VCC ≤ 3.6 V | ||
| Resolution (Temperature-to-Digital Converter) | 0.25 | °C | |||
| Input Resistance (Voltage Inputs) | 140 | kΩ | Attenuators Enabled | ||
| Fan RPM to Digital Converter Accuracy | ±8.0 | % | |||
| RESET Pulse Width | 140 | 180 | ms | ||
| RESET Threshold (Falling Voltage) | 3.0 | 3.05 | 3.1 | V |
Key Features
- Multi-Functionality: Monitors temperature in up to three remote locations and its ambient temperature, and includes up to 13 voltage monitoring inputs.
- Fan Control: Supports high-frequency PWM for 4-wire fans and low-frequency PWM for 2-wire and 3-wire fans, with up to four PWM outputs.
- Fan Speed Measurement: Includes up to eight TACH inputs to measure the speed of 3-wire and 4-wire fans.
- GPIO and Other I/Os: Features general-purpose I/Os (GPIO1 to GPIO8), THERM I/O, and RESET I/O.
- SMBus Compatibility: Fully compatible with SMBus 1.1 and SMBus 1.0.
- Power Flexibility: Can be powered by 3.3 V or 5.0 V supply, with low power state monitoring capabilities.
- Thermal Protection: Includes thermal protection features with overtemperature event indicators.
Applications
- Server and Data Center Systems: Ideal for monitoring and controlling cooling systems in server racks and data centers.
- Industrial Automation: Suitable for use in industrial control systems where temperature and voltage monitoring are critical.
- Telecommunications Equipment: Used in telecom equipment to ensure reliable operation by monitoring temperature and voltage levels.
- Embedded Systems: Can be integrated into various embedded systems requiring advanced system monitoring and fan control.
Q & A
- What is the primary function of the ADT7462?
The ADT7462 is a flexible system monitor IC that monitors temperature, voltage, and controls system fans.
- How many remote temperature locations can the ADT7462 monitor?
The ADT7462 can monitor temperature in up to three remote locations.
- What types of fans does the ADT7462 support?
The ADT7462 supports high-frequency PWM for 4-wire fans and low-frequency PWM for 2-wire and 3-wire fans.
- How many TACH inputs does the ADT7462 have?
The ADT7462 has up to eight TACH inputs to measure the speed of fans.
- What is the voltage range for the voltage monitoring inputs?
The voltage monitoring inputs range from 12 V to 0.9 V.
- Is the ADT7462 compatible with SMBus?
Yes, the ADT7462 is fully compatible with SMBus 1.1 and SMBus 1.0.
- What are the power supply options for the ADT7462?
The ADT7462 can be powered by either a 3.3 V or a 5.0 V supply.
- Does the ADT7462 have thermal protection features?
Yes, the ADT7462 includes thermal protection features with overtemperature event indicators.
- What is the package type of the ADT7462?
The ADT7462 is available in a 32-lead LFCSP_VQ package.
- What are some common applications of the ADT7462?
The ADT7462 is commonly used in server and data center systems, industrial automation, telecommunications equipment, and various embedded systems.
