Overview
The ADT7490ARQZ-REEL, produced by onsemi, is a comprehensive thermal monitor and multiple PWM fan controller designed for noise-sensitive or power-sensitive applications that require active system cooling. This component is part of the dBCool® series and is optimized for systems needing precise temperature monitoring and fan speed control.
Key Specifications
| Parameter | Unit | Max | Typ | Min | Conditions |
|---|---|---|---|---|---|
| Operating Temperature | °C | 150 | - | -40 | - |
| Package | - | SSOP-24 | - | - | - |
| Power Supply Voltage (VCC) | V | 5.5 | - | 3.0 | - |
| Analog-to-Digital Converter (ADC) Total Unadjusted Error (TUE) | % | ±2 | ±1.5 | - | -40°C ≤ TA ≤ +125°C |
| Digital Input Logic Levels (VIH, VIL) | V | 5.5, 0.8 | - | 0.3, 0 | - |
Key Features
- Temperature Measurement: Includes one local on-chip temperature sensor, two remote temperature sensors with series resistance cancellation, and supports up to four PECI inputs for CPU thermal information.
- Fan Drive and Fan Speed Control: Provides three high-frequency or low-frequency PWM outputs for 3-wire or 4-wire fans, and four TACH inputs to measure fan speed. Automatic fan speed control is OS-independent and based on thermal information.
- Bidirectional THERM/SMBALERT Pin: Flags out-of-limit and overtemperature conditions, and can be used as an output to signal overtemperature or for clock modulation purposes.
- GPIO Functionality: Supports extra features such as loadline setting for voltage regulation, LED control, or other functions.
- IMON Monitoring: Monitors CPU current and power information.
- Dynamic TMIN Control Mode: Optimizes system acoustics by controlling fan speed based on thermal information.
Applications
The ADT7490ARQZ is suitable for various applications requiring precise thermal monitoring and active cooling, including:
- Noise-sensitive systems where minimal acoustic noise is crucial.
- Power-sensitive systems that require efficient cooling solutions.
- Server and data center environments where temperature control is critical.
- High-performance computing systems that generate significant heat.
- Industrial and embedded systems requiring robust thermal management.
Q & A
- What is the primary function of the ADT7490ARQZ?
The primary function of the ADT7490ARQZ is to serve as a thermal monitor and multiple PWM fan controller for systems requiring active cooling and precise temperature monitoring.
- How many remote temperature sensors does the ADT7490ARQZ support?
The ADT7490ARQZ supports two remote temperature sensors with series resistance cancellation.
- What is the PECI interface used for in the ADT7490ARQZ?
The PECI interface is used to read CPU thermal information, supporting up to four PECI inputs.
- How does the ADT7490ARQZ control fan speed?
The ADT7490ARQZ controls fan speed using automatic fan speed control based on thermal information from local, remote, or PECI temperature sensors.
- What is the purpose of the THERM/SMBALERT pin?
The THERM/SMBALERT pin is used to flag out-of-limit and overtemperature conditions and can also be used for clock modulation purposes.
- What package type is the ADT7490ARQZ available in?
The ADT7490ARQZ is available in a 24-SSOP package.
- What is the operating temperature range of the ADT7490ARQZ?
The operating temperature range of the ADT7490ARQZ is from -40°C to 150°C.
- Does the ADT7490ARQZ support GPIO functionality?
Yes, the ADT7490ARQZ supports GPIO functionality for additional features like loadline setting, LED control, etc.
- How does the ADT7490ARQZ monitor CPU current and power?
The ADT7490ARQZ monitors CPU current and power information through its IMON functionality.
- Is the ADT7490ARQZ compatible with other onsemi products?
The ADT7490ARQZ is pin and register map compatible with the ADT7476A.
