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ADM2914-2ARQZ データシート(PDF) 1 Page - Analog Devices |
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ADM2914-2ARQZ データシート(HTML) 1 Page - Analog Devices |
1 / 16 page Quad UV/OV Positive/Negative Voltage Supervisor ADM2914 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2009 Analog Devices, Inc. All rights reserved. FEATURES Quad UV/OV positive/negative supervisor Supervises up to 2 negative rails Adjustable UV and OV input thresholds High threshold accuracy over temperature: ±1.5% 1 V buffered reference output Open-drain UV and APPLICATIONS OV reset outputs Adjustable reset timeout with disable option Outputs guaranteed down to V CC of 1 V Glitch immunity 62 µA supply current 16-lead QSOP package Server supply monitoring FPGA/DSP core and I/O voltage monitoring Telecommunications equipment Medical equipment FUNCTIONAL BLOCK DIAGRAM TIMER TIMER VCC LOGIC OUTPUT LOGIC REF 500mV 500mV 500mV 500mV MUX SEL GND ADM2914 VH1 UV OV REF LATCH/DIS VL1 VH2 VL2 VH3 VL3 VH4 VL4 Figure 1. GENERAL DESCRIPTION The ADM2914 is a quad voltage supervisory IC ideally suited for monitoring multiple rails in a wide range of applications. Each monitored rail has two dedicated input pins, VHx and VLx, which allows each rail to be monitored for both overvoltage (OV) and undervoltage (UV) conditions. A common active low undervoltage (UV) and overvoltage ( The device incorporates an internal shunt regulator that enables the device to be used in higher voltage systems. This feature requires a resistor to be placed between the main supply rail and the VCC pin to limit the current flow into the VCC pin to no greater than 10 mA. The ADM2914 uses the internal shunt regulator to regulate VCC if the supply line exceeds the absolute maximum ratings. The ADM2914 is available in two models. The ADM2914-1 offers a latching overvoltage output that can be cleared by toggling the OV) pin is shared by each of the monitored voltage rails. The ADM2914 includes a 1 V buffered reference output, REF, that acts as an offset when monitoring a negative voltage. The three-state SEL pin determines the polarity of the third and fourth inputs, that is, it configures the device to monitor positive or negative supplies. LATCH input pin. The ADM2914-2 has a disable pin that can override and disable both the OV and UV The ADM2914 is available in a 16-lead QSOP package. The device operates over the extended temperature range of −40°C to +125°C. output signals. |
同様の部品番号 - ADM2914-2ARQZ |
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同様の説明 - ADM2914-2ARQZ |
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