Dual Low Power 1.5% Comparator
With 400 mV Reference
ADCMP670
Rev. A
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FEATURES
400 mV ± 1.5% threshold
Supply range: 1.7 V to 5.5 V
Low quiescent current: 6.5 μA typical
Input range includes ground
Internal hysteresis: 8.9 mV typical
Low input bias current: ±10 nA maximum
Open-drain outputs
Supports wire-AND connections
Input polarities: one inverting and one noninverting
Low profile (1 mm) TSOT package
Drop-in replacement for the LT6700-1
APPLICATIONS
Li-Ion monitoring
Portable applications
Hand-held instruments
Window comparators
LED/relay driving
Optoisolator driving
Control systems
FUNCTIONAL BLOCK DIAGRAM
DD
+IN
OUTA
OUTB
–INB
GND
400mV
ADCMP670-1
06493-001
386
THRESHOLD VOLTAGE (mV)
TEMPERATURE (°C)
–40 –20 0 20 40 60 80 100 120
404
402
400
398
396
394
392
390
388
Figure 1.
GENERAL DESCRIPTION
The ADCMP670 consists of two low power, high accuracy,
comparator and reference circuits in a 6-lead TSOT package.
The internal 400 mV reference provides the ability to monitor
low voltage supplies. The device operates on a supply voltage
from 1.7 V to 5.5 V and draws only 6.5 μA typical, making it
suitable for low power system monitoring and portable applica-
tions. Hysteresis is included in the comparators. The comparator
outputs are open-drain and the output can be pulled up to any
voltage up to 5.5 V. The output stage is guaranteed to sink
greater than 5 mA over temperature.
The ADCMP670 is currently available in one model, the
ADCMP670-1. This model has one inverting input and one
noninverting input, making it suitable for use as a window
comparator. The device is suitable for portable, commercial,
industrial, and automotive applications.
2A1A
1B 2B
RISING INPUT
FALLING INPUT
TWO TYPICAL PARTS
COMP A AND COMP B
V
DD
= 5V
06493-002
Figure 2. Comparator Thresholds vs. Temperature
