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ADM9264 Datasheet(PDF) 1 Page - Analog Devices |
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ADM9264 Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADM9264 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 FEATURES Monitoring of 12 V, 5 V, 3.3 V and 2.8 V Supplies in Parallel Auxiliary Sensor Inputs Low Power: 25 A Typical Internal Comparator Hysteresis Power Supply Glitch Immunity VCC from 2.5 V to 6 V Guaranteed from – 4 0 C to +85 C No External Components 16-Pin Narrow SOIC Package (150 Mil Wide) APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Network Systems FUNCTIONAL BLOCK DIAGRAM L H VREF NC = NO CONNECT L H L H L H PWROK MONITOR LOGIC 14 13 12 11 16 15 10 9 8 1 2 3 4 7 6 5 GND SU1 SU2 SU3 SU4 NC ERRX VCC ERR1 ERR2 PWROK ERR3 ERR4 DIS ERRY SU4DET ADM9264 Quad Power Supply Monitor for Desktop PCs GENERAL DESCRIPTION The ADM9264 is a Quad Supply Monitor IC which simulta- neously monitors four separate power supply voltages and out- puts error signals if any of the supply voltages go out of limits. It is designed for PC supply monitoring but can be used on any system where multiple power supplies require monitor- ing. The error output signals are available individually and also gated into a common output - PWROK. Auxiliary inputs ERRX, ERRY are provided which are also gated into the main PWROK signal. These inputs allow signals from other monitor- ing circuits (for example temperature sensor, alarm, etc.) to be linked into the ADM9264. Each power supply monitor circuit uses a proprietary window comparator design whereby a three resistor network is used in conjunction with two comparators and a single precision voltage reference to check if the supply is within its required operating tolerance. An added feature of this design is that the power supply voltages being monitored can be higher than the power supply voltage to the monitoring IC itself. Analog Devices’ experience in the design of power supply super- visory circuits is used to provide an optimum solution for the overall circuit in terms of cost, performance and power con- sumption. Key features of the design include the incorporation of hysteresis and glitch immunity into the comparators, which minimizes the possibility of spurious triggering by noise spikes on the supplies being monitored. The part is manufactured on one of Analog Devices’ proprietary BiCMOS processes, which also includes high performance thin film resistors to achieve the accuracy required for the precision voltage reference and power supply high and low trip points. |
Similar Part No. - ADM9264_15 |
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Similar Description - ADM9264_15 |
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