Overview
The ADT7462ACPZ-REEL, produced by onsemi, is a flexible systems monitor IC designed for a wide range of applications. It is capable of monitoring temperature in up to three remote locations, as well as its ambient temperature. The IC features up to four PWM outputs for controlling fan speeds and supports both high and low frequency PWM drives for 2-wire, 3-wire, and 4-wire fans. Additionally, it includes up to eight TACH inputs to measure fan speeds and up to 13 voltage monitoring inputs ranging from 12 V to 0.9 V. The ADT7462 is fully compatible with SMBus 1.1 and SMBus 1.0, and it operates at both 3.3 V and 5 V.
Key Specifications
| Parameter | Min | Max | Unit | Test Conditions/Comments | |
|---|---|---|---|---|---|
| Supply Voltage | 3.0 | 3.3 | 5.5 | V | |
| Supply Current, ICC | 1.5 | 4.0 | mA | ADC Active, Interface Inactive | |
| Operating Temperature | -40 | 125 | °C | ||
| Internal Sensor Temperature Accuracy | ±0.5 | ±4.0 | °C | 0°C ≤ TA ≤ 85°C, 3 V ≤ VCC ≤ 3.6 V | |
| Remote Sensor Temperature Accuracy | ±0.5 | ±3.5 | °C | −40°C ≤ TD ≤ +125°C, 3 V ≤ VCC ≤ 3.6 V | |
| Series Resistance Cancellation | 2.0 | kΩ | Cancels 2 kΩ in series with the remote thermal diode | ||
| Package Type | LFCSP-32 |
Key Features
- One local and up to three remote temperature channels with series resistance cancellation on remote channels
- Thermal protection using THERM pins
- Up to four PWM fan drive outputs, supporting both high and low frequency PWM drives
- Up to eight TACH inputs to measure the speed of 3-wire and 4-wire fans
- Automatic fan speed control loop including dynamic TMIN control
- Monitors up to 13 voltage inputs ranging from 12 V to 0.9 V
- Monitors up to 7 VID inputs, including VID-on-fly support
- Bidirectional reset and chassis intrusion detect
- SMBus 1.1- and SMBus 1.0-compatible
- 3.3 V and 5 V operation
Applications
- Thermal Management
- Notebook and Desktop Computers
- Game Consoles
- RFID Readers
- Multi-Channel Analog Receiver/Amplifier
Q & A
- What is the primary function of the ADT7462?
The ADT7462 is a flexible systems monitor IC that monitors temperature, voltage, and controls fan speeds.
- How many remote temperature channels can the ADT7462 monitor?
The ADT7462 can monitor up to three remote temperature channels.
- What types of fans does the ADT7462 support?
The ADT7462 supports 2-wire, 3-wire, and 4-wire fans with both high and low frequency PWM drives.
- How many TACH inputs does the ADT7462 have?
The ADT7462 has up to eight TACH inputs to measure fan speeds.
- What is the operating voltage range of the ADT7462?
The ADT7462 operates at 3.3 V and 5 V.
- Is the ADT7462 compatible with SMBus?
Yes, the ADT7462 is fully compatible with SMBus 1.1 and SMBus 1.0.
- 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?
Common applications include notebook and desktop computers, game consoles, RFID readers, and multi-channel analog receiver/amplifiers.
- Does the ADT7462 support automatic fan speed control?
Yes, the ADT7462 includes an automatic fan speed control loop with dynamic TMIN control.
- How many voltage inputs can the ADT7462 monitor?
The ADT7462 can monitor up to 13 voltage inputs ranging from 12 V to 0.9 V.
