Features and Benefits

  • 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: 8.55 μA maximum 
  • 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

Product Details

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 only 8.55 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.


  • Supply voltage monitoring
  • Li-ion monitoring
  • Portable applications
  • Handheld instruments

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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