Ultralow Power Voltage Detector

Data Sheet

ADM8641/ADM8642

Rev. D

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FEATURES

Precision, low voltage monitoring

Pretrimmed voltage monitoring threshold options

10 options from 2 V to 4.63 V for the ADM8641

20 options from 0.5 V to 1.9 V for the ADM8642

±1.3% threshold accuracy over full temperature range

Output disable input

23 μs to 26 μs typical propagation delay

Open-drain type output

Power supply glitch immunity

Available in a 1.46 mm × 0.96 mm WLCSP

Operational temperature range: −40°C to +85°C

APPLICATIONS

Portable/battery-operated equipment

Microprocessor systems

Energy metering

Energy harvesting

FUNCTIONAL BLOCK DIAGRAMS

DIS

VCC

GND

ADM8641

OUT

Figure 1. ADM8641 Functional Block Diagram

DIS

VCC

GND

VIN

ADM8642

OUT

Figure 2. ADM8642 Functional Block Diagram

GENERAL DESCRIPTION

The ADM8641 and ADM8642 are simple voltage detectors

suitable for use in general-purpose applications. The ultralow

power consumption of these devices makes them suitable for

power efficiency sensitive systems, such as battery-powered

portable devices and energy meters.

The factory preset detection thresholds from 0.5 V to 4.63 V

with ±1.2% accuracy over the full temperature range enable the

devices to monitor the node of interest accurately with direct

contact. The DIS input lets the user hold the output low

regardless of the state of the input. Not all device options are

released for sale as standard models. See the Ordering Guide

section for full information.

The ADM8641 monitors the voltage using the VCC pin. The

separate supply pin on the ADM8642 allows it to have a lower

detection threshold down to 0.5 V.

The ADM8641 and ADM8642 are available in a 6-ball, 1.46 mm ×

0.96 mm WLCSP. These devices are specified over the −40°C to

+85°C temperature range.