Datasheet ADCMP671 (Analog Devices)

Low Power, Adjustable UV and OV Monitor with 400 mV, ±0.275% Reference Data Sheet ADCMP671 FEATURES FUNCTIONAL BLOCK DIAGRAM Window monitoring with minimum processor I/O VDD Individually monitoring N rails with only N + 1 processor I/O ADCMP671 PWRGD 400 mV, ± 0.275% threshold at VDD = 3.3 V, 25°C INH Supply range: 1.7 V to 5.5 V UV Low quiescent current: 17 μA maximum at 125°C Input range includes ground 400mV OV Internal hysteresis: 9.2 mV typical Low input bias current: 2.5 nA maximum OV INL Open-drain outputs Power good indication output
-001 60
GND Designated over voltage indication output
101
Low profile (1 mm), 6-lead TSOT package
Figure 1.
APPLICATIONS Supply voltage monitoring Li-Ion monitoring Portable applications Handheld instruments GENERAL DESCRIPTION
The ADCMP671 voltage monitor consists of two low power, high
404 INH1 INH2
accuracy comparators and reference circuits. It operates on a
402 INL1 INL2
supply voltage from 1.7 V to 5.5 V and draws 17 μA maximum,
) V 400
making it suitable for low power system monitoring and portable
(m E RISING INPUT
applications. The part is designed to monitor and report supply
398 AG
undervoltage and overvoltage fault. The low input bias current
T L 396 O
and voltage reference allows resistor adjustable UV and OV
D V L 394
threshold down to 400 mV. The ADCMP671 has two open-
HO S 392 FALLING INPUT
drain outputs: the PWRGD output indicates that the supply is
HRE
within the UV and OV window, and the OV output indicates
T 390
that the supply is overvoltage. This output combination allows
TWO TYPICAL PARTS 388 COMPARATOR A AND COMPARATOR B
users to window monitor N supplies with an N + 1 processor
VDD = 5V 386
input/output (I/O). Each output is guaranteed to sink greater 2
–40 –20 0 20 40 60 80 100 120
00 0- than 5 mA over temperature.
TEMPERATURE (°C)
16 10 Figure 2. Comparator Thresholds vs. Temperature The ADCMP671 is available in 6-lead TSOT package. The device operates over the −40°C to +125°C temperature range.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION COMPARATORS AND INTERNAL REFERENCE POWER SUPPLY INPUTS HYSTERESIS VOLTAGE MONITORING SCHEME OUTPUTS OUTLINE DIMENSIONS ORDERING GUIDE