Low Power, Adjustable UV and OV Monitor with 400 mV, 0.275% Reference Data Sheet ADCMP671 FEATURES FUNCTIONAL BLOCK DIAGRAM V DD Window monitoring with minimum processor I/O Individually monitoring N rails with only N + 1 processor I/O ADCMP671 PWRGD 400 mV , 0.275% threshold at V = 3.3 V, 25C DD INH UV Supply range: 1.7 V to 5.5 V Low quiescent current: 17 A maximum at 125C 400mV Input range includes ground OV Internal hysteresis: 9.2 mV typical OV Low input bias current: 2.5 nA maximum INL Open-drain outputs Power good indication output GND Designated over voltage indication output Figure 1. Low profile (1 mm), 6-lead TSOT package APPLICATIONS Supply voltage monitoring Li-Ion monitoring Portable applications Handheld instruments GENERAL DESCRIPTION 404 The ADCMP671 voltage monitor consists of two low power, high INH1 INH2 INL1 INL2 accuracy comparators and reference circuits. It operates on a 402 supply voltage from 1.7 V to 5.5 V and draws 17 A maximum, 400 making it suitable for low power system monitoring and portable RISING INPUT 398 applications. The part is designed to monitor and report supply undervoltage and overvoltage fault. The low input bias current 396 and voltage reference allows resistor adjustable UV and OV 394 threshold down to 400 mV. The ADCMP671 has two open- FALLING INPUT 392 drain outputs: the PWRGD output indicates that the supply is 390 within the UV and OV window, and the OV output indicates TWO TYPICAL PARTS that the supply is overvoltage. This output combination allows 388 COMPARATOR A AND COMPARATOR B users to window monitor N supplies with an N + 1 processor V = 5V DD 386 input/output (I/O). Each output is guaranteed to sink greater 40 20 0 20 40 60 80 100 120 TEMPERATURE (C) than 5 mA over temperature. Figure 2. Comparator Thresholds vs. Temperature The ADCMP671 is available in 6-lead TSOT package. The device operates over the 40C to +125C temperature range. 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. THRESHOLD VOLTAGE (mV) 10160-001 10160-002ADCMP671 Data Sheet TABLE OF CONTENTS Typical Performance Characteristics ..............................................9 Features .............................................................................................. 1 Applications Information .............................................................. 14 Applications....................................................................................... 1 Comparators and Internal Reference ...................................... 14 Functional Block Diagram .............................................................. 1 Power Supply............................................................................... 14 General Description ......................................................................... 1 Inputs ........................................................................................... 14 Revision History ............................................................................... 2 Hysteresis..................................................................................... 14 Specifications..................................................................................... 3 Voltage Monitoring Scheme ..................................................... 14 Absolute Maximum Ratings............................................................ 7 Outputs ........................................................................................ 15 Thermal Resistance ...................................................................... 7 Outline Dimensions....................................................................... 16 ESD Caution.................................................................................. 7 Ordering Guide .......................................................................... 16 Pin Configuration and Function Descriptions............................. 8 REVISION HISTORY 11/11Revision 0: Initial Version Rev. 0 Page 2 of 16