The ADM1029 is a versatile fan controller and monitor for use in personal computers, servers, telecommunications equipment, or any high-availability system where reliable control and monitoring of multiple cooling fans is required. Each ADM1029 can control the speed of one or two fans and can measure the speed of fans that have a tachometer output. The ADM1029 can also measure the temperature of one or two external sensing diodes or an internal temperature sensor, allowing fan speed to be adjusted to keep system temperature within acceptable limits. The ADM1029 has FAULT inputs for use with fans that can signal failure conditions, and inputs to detect whether or not fans are connected.
   
Features
• Software Programmable and Automatic Fan Speed Control
• Automatic Fan Speed Control Allows Control
• Independent of CPU Intervention after Initial Setup
• Control Loop Minimizes Acoustic Noise and Power Consumption
• Remote and Local Temperature Monitoring
• Dual Fan Speed Measurement
• Supports Backup and Redundant Fans
• Supports Hot Swapping of Fans
• Cascadable Fault Output Allows Fault Signaling between Multiple
    ADM1029s
• Address Pin Allows Up to Eight ADM1029s in A System
• Small 24-lead QSOP Package
• This is a Pb-Free Device*
   
Applications
• Network Servers and Personal Computers
• Microprocessor-based Office Equipment
• High Availability Telecommunications Equipment