Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Comparator Multi-purpose CMOS, Rail-to-rail, TTL SOIC 8 N

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

available in 14-pin TSSOP and SO packages.

Features

♦ Low-Cost Solution Available in Space-Saving

SC70 Packages (Half the Size of SOT23)

♦ Low 2.8µA Supply Current

♦ 3µs Propagation Delay

♦ Internal 4mV Comparator Hysteresis

♦ Comparator Output Swings Rail-to-Rail

♦ 2.5 to 5.5V Single-Supply Voltage Range

♦ No Phase Reversal for Overdriven Inputs

♦ Space-Saving Packages

5-Pin SC70 (MAX9021)

8-Pin SOT23 (MAX9022)

8-Pin µMAX (MAX9022)

14-Pin TSSOP (MAX9024)

MAX9021/MAX9022/MAX9024

Micropower, Ultra-Small, Single/Dual/Quad,

Single-Supply Comparators

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

OUTIN-

15V

IN+

MAX9021

SC70/SOT23

INB-

INB+V

OUTBINA-

INA+

OUTA

S0T23/µMAX/SO

MAX9022

OUTD

IND-

IND+

INA+

INA-

OUTA

MAX9024

INC+

INC-

OUTCOUTB

INB-

INB+

TSSOP/SO

Pin Configurations

19-1842; Rev 2; 1/07

Ordering Information

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.

PA RT

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX9021AXK-T -40°C to +125°C

5 SC70-5

X5-1

MAX9021AUK-T -40°C to +125°C

5 SOT23-5

U5-1

MAX9022AKA-T -40°C to +125°C

8 SOT23-8

K8-5

MAX9022AUA

-40°C to +125°C

8 µMAX

U8-1

MAX9022ASA

-40°C to +125°C

8 SO

S8-2

MAX9024AUD

-40°C to +125°C

14 TSSOP

U14-1

MAX9024ASD

-40°C to +125°C

14 SO

S14-2

µMAX is a registered trademark of Maxim Integrated Products, Inc.

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.

Applications

Summary of content (8 pages)

PAGE 1
9-1842; Rev 2; 1/07 Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators 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 consume 2.8µA of supply current per comparator over the -40°C to +125°C operating temperature range.
PAGE 2
MAX9021/MAX9022/MAX9024 Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD to VSS) ....................................-0.3V to +6V Voltage Inputs (IN+, IN- to VSS). ................-0.3V to (VDD + 0.3V) Differential Input Voltage (IN+ to IN-)....................................6.6V Current into Input Pins ......................................................±20mA Output Short-Circuit Duration ..................
PAGE 3
Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.8 2.7 MAX9021/2/4 toc03 2.9 1000 SUPPLY CURRENT (µA) 2.8 MAX9021/2/4 toc02 2.9 3.0 SUPPLY CURRENT (µA) MAX9021/2/4 toc01 3.0 SUPPLY CURRENT (µA) SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY SUPPLY CURRENT vs. TEMPERATURE 100 10 2.7 2.6 1 2.5 3 4 5 6 -50 -25 0 1.0 0.8 0.6 100 0.01 125 100 10 1 0.1 OUTPUT TRANSITION FREQUENCY (kHz) OUTPUT HIGH VOLTAGE vs.
PAGE 4
Typical Operating Characteristics (continued) (VDD = 5V, VSS = 0, VCM = 0, RL = 10kΩ, CL = 15pF, VOD = 100mV, TA = +25°C, unless otherwise noted.) PROPAGATION DELAY vs. INPUT OVERDRIVE VOLTAGE 3 2 tPD+ MAX9021/2/4 toc11 tPD- 8 7 IN+ 100mV/div 6 5 4 tPD- VOUT 2.5V/div 3 2 1 PROPAGATION DELAY (tPD+) 9 PROPAGATION DELAY (µs) 4 MAX9021/2/4 toc10 5 MAX9021/2/4 toc12 PROPAGATION DELAY vs.
PAGE 5
Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators PIN NAME FUNCTION MAX9021 MAX9022 MAX9024 1 — — IN+ Comparator Noninverting Input 2 4 11 VSS Negative Supply Voltage 3 — — IN- Comparator Inverting Input 4 — — OUT Comparator Output 5 8 4 VDD Positive Supply Voltage. Bypass with a 0.1µF capacitor to GND.
PAGE 6
MAX9021/MAX9022/MAX9024 Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators R1 R2 VREF VDD VDD VDD VDD VIN IN+ OUT VIN OUT 10kΩ IN- MAX9021 VSS Figure 1. Additional Hysteresis 2) The hysteresis band will be: VHYS = VTH - VTL = VDD(R2 / (R1 + R2)) 3) In this example, let VDD = 5V and VREF = 2.5V. VTH = 2.5V + 2.5V(R2 / (R1 + R2)) and 0.1µF INVSS MAX9021 Figure 2.
PAGE 7
Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators MAX9021 TRANSISTOR COUNT: 106 MAX9022 TRANSISTOR COUNT: 212 MAX9024 TRANSISTOR COUNT: 424 VDD VIN 0.1µF R1 Chip Information VDD IN+ VREF OUT INRL R2 MAX9021 Package Information SC70, 5L.EPS (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
PAGE 8
Package Information (continued) SOT-23 5L .EPS (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) SOT23, 8L .EPS MAX9021/MAX9022/MAX9024 Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators Revision History Pages changed at Rev 2: 1, 2, 6, 7, 8 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.