Overview
The ADT7470ARQZ-REEL, produced by Analog Devices Inc., is a multichannel, pulse-width modulation (PWM) fan controller and monitor designed for systems that require active cooling and monitoring. This device communicates with the system via a serial system management bus, supporting both SMBus and fast I2C specifications. It integrates fan control and monitoring functions along with temperature sensing capabilities, making it a versatile component for various cooling applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 | 5.5 | V | TA = −40°C to +125°C |
| Supply Current, ICC | 0.5 | 0.8 | mA | TA = −40°C to +125°C | |
| Standby Current, ICC | 4 | µA | TA = −40°C to +125°C | ||
| Clock Frequency, fSCLK | 400 | kHz | See Figure 2 | ||
| Glitch Immunity, tSW | 50 | ns | See Figure 2 | ||
| Bus Free Time, tBUF | 1.3 | µs | See Figure 2 | ||
| Positive Supply Voltage (VCC) Rating | 6.5 | V | Absolute Maximum Rating | ||
| Maximum Junction Temperature (TJ max) | 150 | °C | Absolute Maximum Rating |
Key Features
- Multi-channel PWM fan controller and monitor.
- Supports SMBus and fast I2C communication protocols.
- Includes four general-purpose I/O pins that can be configured as either logic pins or PWM outputs.
- Integrated temperature sensing capabilities using on-board TMP05s (on evaluation board).
- Serial bus address selection with a single address line (Pin 11).
- Open-drain digital outputs and SMBus bidirectional serial data line.
- Fan RPM-to-digital converter with accuracy of ±12% full-scale count.
- Low power consumption with standby current of 4 µA.
Applications
The ADT7470ARQZ-REEL is suitable for various applications requiring active cooling and monitoring, such as:
- Server and data center cooling systems.
- High-performance computing systems.
- Telecommunication equipment.
- Industrial control systems.
- Any system requiring precise fan control and temperature monitoring.
Q & A
- What is the primary function of the ADT7470ARQZ-REEL?
The primary function of the ADT7470ARQZ-REEL is to act as a multichannel PWM fan controller and monitor for systems requiring active cooling and monitoring. - What communication protocols does the ADT7470ARQZ-REEL support?
The ADT7470ARQZ-REEL supports both SMBus and fast I2C communication protocols. - What is the supply voltage range for the ADT7470ARQZ-REEL?
The supply voltage range for the ADT7470ARQZ-REEL is from 3.0 V to 5.5 V. - What is the standby current of the ADT7470ARQZ-REEL?
The standby current of the ADT7470ARQZ-REEL is 4 µA. - How many general-purpose I/O pins does the ADT7470ARQZ-REEL have?
The ADT7470ARQZ-REEL has four general-purpose I/O pins that can be configured as either logic pins or PWM outputs. - What is the maximum junction temperature for the ADT7470ARQZ-REEL?
The maximum junction temperature for the ADT7470ARQZ-REEL is 150°C. - Can the ADT7470ARQZ-REEL be used in high-performance computing systems?
Yes, the ADT7470ARQZ-REEL is suitable for use in high-performance computing systems due to its precise fan control and temperature monitoring capabilities. - How does the ADT7470ARQZ-REEL handle fan RPM-to-digital conversion?
The ADT7470ARQZ-REEL includes a fan RPM-to-digital converter with an accuracy of ±12% full-scale count. - What is the clock frequency range for the serial bus of the ADT7470ARQZ-REEL?
The clock frequency for the serial bus of the ADT7470ARQZ-REEL is 400 kHz. - Does the ADT7470ARQZ-REEL have integrated temperature sensing capabilities?
Yes, the ADT7470ARQZ-REEL, especially on its evaluation board, includes integrated temperature sensing capabilities using on-board TMP05s.
