MAX9021 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators

19-1842; Rev 1; 7/01
Micropower, Ultra-Small, Single/Dual/Quad,
Single-Supply Comparators
General Description
The MAX9021/MAX9022/MAX9024 single/dual/quad
comparators are optimized for low-power consumption
while still providing a fast output response. They are
designed for single-supply applications from 2.5V to
5.5V, but can also operate from dual supplies. These
comparators have a 3µs propagation delay and con-
sume 2.8µA of supply current per comparator over the
-40°C to +125°C operating temperature range. The
combination of low-power, single-supply operation
down to 2.5V, and ultra-small footprint makes these
devices ideal for portable applications.
The MAX9021/MAX9022/MAX9024 have 4mV of built-in
hysteresis to provide noise immunity and prevent oscil-
lations even with a slow-moving input signal. The input
common-mode range extends from the negative supply
to within 1.1V of the positive supply. The design of the
comparator-output stage substantially reduces switch-
ing current during output transitions, eliminating power-
supply glitches.
The MAX9021 single comparator is available in tiny 5-
pin SC70 and SOT23 packages. The MAX9022 dual
comparator is available in 8-pin SOT23, µMAX, and SO
packages, and the MAX9024 quad comparator is avail-
able in 14-pin TSSOP and SO packages.
Applications
Battery-Powered
Portable Systems
Mobile Communications
Sensor-Signal Detection
Photodiode Preamps
Digital Line Receivers
Keyless Entry Systems
Threshold Detectors/
Discriminators
Features
o Low-Cost Solution Available in Space-Saving
SC70 Packages (Half the Size of SOT23)
o Low 2.8µA Supply Current
o 3µs Propagation Delay
o Internal 4mV Comparator Hysteresis
o Comparator Output Swings Rail-to-Rail^®
o 2.5 to 5.5V Single-Supply Voltage Range
o No Phase Reversal for Overdriven Inputs
o Space-Saving Packages
5-Pin SC70 (MAX9021)
8-Pin SOT23 (MAX9022)
8-Pin µMAX (MAX9022)
14-Pin TSSOP (MAX9024)
Ordering Information
PART
MAX9021AXK-T
MAX9021AUK-T
MAX9022AKA-T
MAX9022AUA
MAX9022ASA
MAX9024AUD
MAX9024ASD
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
5 SC70-5
5 SOT23-5
8 SOT23-8
8 µMAX
8 SO
14 TSSOP
14 SO
Typical Application Circuit appears at end of data sheet.
Pin Configurations
TOP VIEW
IN+ 1
5 V_DD
MAX9021
V_SS 2
IN- 3
4 OUT
SC70/SOT23
OUTA 1
INA- 2
INA+ 3
V_SS 4
MAX9022
8 V_DD
7 OUTB
6 INB-
5 INB+
S0T23/µMAX/SO
OUTA 1
INA- 2
INA+ 3
V_DD 4
INB+ 5
INB- 6
OUTB 7
MAX9024
14 OUTD
13 IND-
12 IND+
11 V_SS
10 INC+
9 INC-
8 OUTC
TSSOP/SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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