ADT7462 Datasheet | Analog Devices

FEATURES One local and up to three remote temperature channels Series resistance cancellation on remote channels Thermal protection using THERM pins Up to four PWM fan drive outputs Supports both high and low frequency PWM drives Up to eight TACH inputs Measures the speed of 3-wire and 4-wire fans Automatic fan speed control loop Includes dynamic TMIN control Monitors up to 13 voltage inputs Monitors up to 7 VID inputs Includes VID-on-fly support Bidirectional reset Chassis intrusion detect SMBus 1.1- and SMBus 1.0-patible 3.3 V and 5 V operation Extended operating range from - 40°C to +125°C Space-saving 32-lead chip scale package GENERAL DESCRIPTION The ADT7462 is a flexible systems monitor IC, suitable for use in a wide variety of applications. It can monitor temperature in up to three remote locations, as well as its ambient temperature. There are up to four PWM outputs. These can be used to control the speed of a cooling fan by varying the % duty cycle of the PWM drive signal applied to the fan. The ADT7462 supports high frequency PWM for 4-wire fans and low frequency PWM for 2-wire and 3-wire fans. There are up to eight TACH inputs, which can be used to measure the speed of 3-wire and 4-wire fans. There are up to 13 voltage monitoring inputs, ranging from 12 V to 0.9 V. The ADT7462 is fully patible with SMBus 1.1 and SMBus 1.0. The ADT7462 also includes a THERM I/O and a RESET I/O. The ADT7462 is available in a 32-lead LFCSP_VQ. Many of the pins are multifunctional. There are five easy configuration options, which are set up using the easy configuration register. Users pick the configuration closest to their requirements; individual pins can be reconfigured after the easy configuration option has been chosen. APPLICATIONS Servers and personal puters Telemunications equipment Test equipment and measurement instruments FUNCTIONAL BLOCK DIAGRAM SMBus ADDRESS SCL SDA ALERT SMBus ADDRESS SELECTION VID0 TO VID6 VID REGISTER PWM REGISTERS ACOUSTIC...