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ADCMP671 Datasheet(PDF) 1 Page - Analog Devices |
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ADCMP671 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page Low Power, Adjustable UV and OV Monitor with 400 mV, ±0.275% Reference Data Sheet ADCMP671 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 ©2011 Analog Devices, Inc. All rights reserved. FEATURES Window monitoring with minimum processor I/O Individually monitoring N rails with only N + 1 processor I/O 400 mV , ± 0.275% threshold at VDD = 3.3 V, 25°C Supply range: 1.7 V to 5.5 V Low quiescent current: 17 μA maximum at 125°C Input range includes ground Internal hysteresis: 9.2 mV typical Low input bias current: 2.5 nA maximum Open-drain outputs Power good indication output Designated over voltage indication output Low profile (1 mm), 6-lead TSOT package APPLICATIONS Supply voltage monitoring Li-Ion monitoring Portable applications Handheld instruments FUNCTIONAL BLOCK DIAGRAM INH UV OV INL VDD GND 400mV ADCMP671 PWRGD OV Figure 1. GENERAL DESCRIPTION The ADCMP671 voltage monitor consists of two low power, high accuracy comparators and reference circuits. It operates on a supply voltage from 1.7 V to 5.5 V and draws 17 μA maximum, making it suitable for low power system monitoring and portable applications. The part is designed to monitor and report supply undervoltage and overvoltage fault. The low input bias current and voltage reference allows resistor adjustable UV and OV threshold down to 400 mV. The ADCMP671 has two open- drain outputs: the PWRGD output indicates that the supply is within the UV and OV window, and the OV output indicates that the supply is overvoltage. This output combination allows users to window monitor N supplies with an N + 1 processor input/output (I/O). Each output is guaranteed to sink greater than 5 mA over temperature. The ADCMP671 is available in 6-lead TSOT package. The device operates over the −40°C to +125°C temperature range. 386 TEMPERATURE (°C) –40 –20 0 20 40 60 80 100 120 404 402 400 398 396 394 392 390 388 RISING INPUT FALLING INPUT INL2 INH2 INL1 INH1 TWO TYPICAL PARTS COMPARATOR A AND COMPARATOR B VDD = 5V Figure 2. Comparator Thresholds vs. Temperature |
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