ADM1025

a FEATURES Up to Eight Measurement Channels Five Inputs to Measure Supply Voltages V CC Monitored Internally External Temperature Measurement with Remote Diode On-Chip Temperature Sensor Five Digital Inputs for VID Bits Integrated 100 k⍀ Pull-Ups on VID Pins (ADM1025 Only) LDCM Support I2C®-Compatible System Management Bus (SMBus) Programmable RESET Output Pin Programmable INT Output Pin Configurable Offset for Internal/External Channel Shutdown Mode to Minimize Power Consumption Limit Comparison of all Monitored Values APPLICATIONS Network Servers and Personal Computers Microprocessor-Based Office Equipment Test Equipment and Measuring Instruments Low-Cost PC Hardware Monitor ASIC ADM1025/ADM1025A* PRODUCT DESCRIPTION The ADM1025/ADM1025A is a complete system hardware monitor for microprocessor-based systems, providing measurement and limit comparison of various system parameters. Five voltage measurement inputs are provided, for monitoring 2.5 V, 3.3 V, 5 V and 12 V power supplies and the processor core voltage. The ADM1025/ADM1025A can monitor a sixth power supply voltage by measuring its own VCC. One input (two pins) is dedicated to a remote temperature-sensing diode, and an on-chip temperature sensor allows ambient temperature to be monitored. The ADM1025A has open-drain VID inputs while the ADM1025 has on-chip 100 kΩ pull-ups on the VID inputs. Measured values and in/out of limit status can be read out via an I2C-compatible serial System Management Bus. The device can b...