Overview
The ADM1021ARQ-REEL, manufactured by Analog Devices Inc., is a microprocessor system temperature monitor designed for use in personal computers and other electronic systems. This device is a two-channel digital thermometer that includes under/overtemperature alarm functions. It supports both local and remote temperature sensing, making it versatile for various thermal management needs.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Package | 16-QSOP (0.154", 3.90mm Width) |
| Supply Voltage Range | 3.0 - 3.6 V (typical), 3V - 5.5V (operational) |
| Operating Temperature | 0°C ~ 100°C |
| Accuracy | ±1°C Local, ±5°C Remote |
| Output Type | SMBus |
| Standby Supply Current | 1.0 - 5.0 µA at VDD = 3.3 V, no SMBus activity |
| Average Operating Supply Current | 130 - 200 µA at 0.25 conversions/sec, 225 - 370 µA at 2 conversions/sec |
| Conversion Time | 65 - 170 ms from stop bit to conversion complete (both channels) |
| Sensor Type | Internal and External |
| Output Alarm | Yes |
Key Features
- Dual-Channel Temperature Monitoring: Measures both local and remote temperatures using on-chip and external diode temperature sensors.
- Under/Overtemperature Alarms: Generates alerts when temperature exceeds programmed limits.
- SMBus Interface: Allows for control, configuration, and data retrieval via the System Management Bus.
- Low Power Consumption: Standby supply current as low as 1.0 - 5.0 µA at VDD = 3.3 V.
- Programmable Conversion Rate: Supports multiple conversion rates to balance between accuracy and power consumption.
- Alert Masking and Clearing: Ability to mask or enable ALERT outputs and clear current alerts using SMBus commands.
Applications
- Personal Computers: Ideal for monitoring CPU and system temperatures in desktop and laptop computers.
- Server Systems: Used in data centers and server rooms to monitor temperature and ensure optimal operating conditions.
- Industrial Automation: Suitable for temperature monitoring in industrial control systems and automation equipment.
- Telecommunications Equipment: Employed in telecom devices to monitor temperature and prevent overheating.
Q & A
- What is the primary function of the ADM1021ARQ-REEL?
The primary function is to monitor system temperatures, both locally and remotely, and provide under/overtemperature alarms.
- What is the operating voltage range of the ADM1021ARQ-REEL?
The device operates within a supply voltage range of 3.0 - 3.6 V (typical) and up to 3V - 5.5V (operational).
- What type of interface does the ADM1021ARQ-REEL use for communication?
The device uses the System Management Bus (SMBus) for control, configuration, and data retrieval.
- How accurate is the temperature measurement of the ADM1021ARQ-REEL?
The device has an accuracy of ±1°C for local temperature measurements and ±5°C for remote temperature measurements.
- What is the standby supply current of the ADM1021ARQ-REEL?
The standby supply current is 1.0 - 5.0 µA at VDD = 3.3 V with no SMBus activity.
- Can the conversion rate of the ADM1021ARQ-REEL be programmed?
Yes, the conversion rate can be programmed to balance between accuracy and power consumption.
- How does the ADM1021ARQ-REEL handle temperature alarms?
The device generates alerts when temperature exceeds programmed limits and allows for masking or enabling ALERT outputs via SMBus commands.
- What types of sensors does the ADM1021ARQ-REEL support?
The device supports both internal and external diode temperature sensors.
- What is the typical conversion time for the ADM1021ARQ-REEL?
The conversion time is typically 65 - 170 ms from the stop bit to conversion complete for both channels.
- In what types of systems is the ADM1021ARQ-REEL commonly used?
The device is commonly used in personal computers, server systems, industrial automation, and telecommunications equipment.
