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ADM1185 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADM1185 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 16 page Quad Voltage Monitor and Sequencer ADM1185 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Powered from 2.7 V to 5.5 V on the VCC pin Monitors 4 supplies via 0.8% accurate comparators Logical core with internal timeouts provides power supply sequencing and fault protection 4 inputs can be programmed to monitor different voltage levels with resistor dividers 3 open-drain enable outputs Open-drain power-good output (PWRGD) 10-lead MSOP APPLICATIONS Monitor and alarm functions Power supply sequencing Telecommunication and data communication equipment PC/servers FUNCTIONAL BLOCK DIAGRAM VIN1 REF = 0.6V OUT1 VIN2 REF = 0.6V OUT2 VIN3 REF = 0.6V OUT3 VIN4 REF = 0.6V PWRGD GND POWER AND REFERENCE GENERATOR REF = 0.6V STATE MACHINE CORE VCC ADM1185 Figure 1. GENERAL DESCRIPTION The ADM1185 is an integrated, four-channel, voltage monitoring and sequencing device. A 2.7 V to 5.5 V power supply is required on the VCC pin to power the device. Four precision comparators monitor four voltage rails. All comparators have a 0.6 V reference with a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the trip points for the monitored supply rails. A digital core interprets the status of the comparator outputs. Internal time delays can be used for sequencing the startup of subsequent power supplies enabled by the outputs. Supplies falling out of range are also detected and, as a result, appropriate outputs are disabled. The ADM1185 has four open-drain outputs. In a typical configuration, OUT1 to OUT3 are used to enable power supplies, while PWRGD is a common power-good output indicating the status of all monitored supplies. The ADM1185 is available in a 10-lead mini small outline package (MSOP). APPLICATIONS DIAGRAM 2.5V OUT 3.3V IN 1.8V OUT 1.2V OUT 2.5V OUT 1.8V OUT 1.2V OUT OUT1 VIN1 OUT2 VIN2 OUT3 VIN3 VIN4 GND PWRGD POWER GOOD VCC ADM1185 GND REGULATOR1 IN EN OUT GND REGULATOR2 IN EN OUT GND REGULATOR3 IN EN OUT Figure 2. |
Số phần tương tự - ADM1185_07 |
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Mô tả tương tự - ADM1185_07 |
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