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.
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)
MAX9021/MAX9022/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
Applications
Battery-Powered
Portable Systems
Mobile Communications
Sensor-Signal Detection
Photodiode Preamps
Digital Line Receivers
Keyless Entry Systems
Threshold Detectors/
Discriminators
Typical Application Circuit appears at end of data sheet.
Pin Configurations
TOP VIEW
IN+ 1
5
V
DD
OUTA 1
INA- 2
8
7
V
DD
OUTB
INB-
V
DD
4
IN- 3
4
OUT
V
SS
4
5
INB+
INB+ 5
INB- 6
OUTA 1
INA-
INA+
6
2
3
14 OUTD
13 IND-
12 IND+
V
SS
2
MAX9021
MAX9022
INA+
3
MAX9024
11 V
SS
10 INC+
9
8
INC-
OUTC
SC70/SOT23
S0T23/µMAX/SO
OUTB 7
TSSOP/SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
