Overview
The ADM1031ARQZ-R7, produced by onsemi, is an ACPI-compliant, three-channel digital thermometer and under/overtemperature alarm designed for thermal management in various electronic systems. It is optimized for use in personal computers, network servers, and other microprocessor-based systems. The device features dual PWM fan control outputs, allowing for the precise control of cooling fan speeds based on temperature measurements. It also includes tachometer inputs for monitoring fan speeds and can detect stalled fans. The ADM1031ARQZ-R7 communicates via a 2-wire System Management Bus (SMBus) and supports Alert Response Address (ARA), ensuring robust and efficient thermal management without the need for CPU intervention.
Key Specifications
| Parameter | Description |
|---|---|
| Temperature Range | 0°C ~ 100°C (External Sensor) |
| Accuracy | ±1°C Local, ±0.5°C Remote |
| Topology | ADC, Comparator, Multiplexer, Register Bank |
| Supply Voltage | 3.0 V to 5.5 V |
| Fan Control Outputs | Dual PWM outputs (33% to 100% duty cycle) |
| Fan Speed Measurement | TACH inputs for fan speed monitoring; can be reprogrammed as analog inputs for 2-wire fans |
| Communication Interface | 2-wire SMBus with ARA support |
| Package Type | QSOP-16 |
| Power Consumption | Shutdown mode to minimize power consumption |
Key Features
- Three-channel digital thermometer for precise temperature monitoring
- Dual PWM fan control outputs for smooth fan speed control
- Tachometer inputs for fan speed monitoring; can be reprogrammed as analog inputs for 2-wire fans
- Detection of stalled fans
- Configurable offsets for temperature channels
- Overtemperature THERM output pin for CPU throttling
- Programmable INT output pin
- Support for Alert Response Address (ARA)
- Shutdown mode to minimize power consumption
Applications
- Notebook PCs
- Network Servers
- Personal Computers
- Telecommunications Equipment
Q & A
- What is the primary function of the ADM1031ARQZ-R7? The primary function is to serve as an intelligent temperature monitor and dual PWM fan controller.
- What is the temperature range of the ADM1031ARQZ-R7? The temperature range is 0°C ~ 100°C for external sensors.
- How accurate is the temperature measurement of the ADM1031ARQZ-R7? The accuracy is ±1°C local and ±0.5°C remote.
- What type of fan control does the ADM1031ARQZ-R7 offer? It offers dual PWM fan control outputs with duty cycles between 33% and 100%.
- Can the ADM1031ARQZ-R7 detect stalled fans? Yes, it can detect stalled fans.
- What communication interface does the ADM1031ARQZ-R7 use? It uses a 2-wire SMBus with ARA support.
- What is the supply voltage range for the ADM1031ARQZ-R7? The supply voltage range is 3.0 V to 5.5 V.
- What package type is the ADM1031ARQZ-R7 available in? It is available in a QSOP-16 package.
- Does the ADM1031ARQZ-R7 have a power-saving feature? Yes, it has a shutdown mode to minimize power consumption.
- In what types of systems is the ADM1031ARQZ-R7 typically used? It is typically used in notebook PCs, network servers, personal computers, and telecommunications equipment.
