MAXIM MAX9021, MAX9022, MAX9024 User Manual

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 consume 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 oscillations 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 switching current during output transitions, eliminating powersupply glitches.

The MAX9021 single comparator is available in tiny 5pin 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

87V

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-

PKG CODE

5 SC70-5

X5-1

U5-1

K8-5

MAX9022AUA

8 µMAX

U8-1

MAX9022ASA

8 SO

S8-2

MAX9024AUD

U14-1

MAX9024ASD

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

PACKAGE

MAX9021AXK-T -40°C to +125°C

MAX9021AUK-T -40°C to +125°C

MAX9022AKA-T -40°C to +125°C

-40°C to +125°C

5 SOT23-5

8 SOT23-8

14 TSSOP

MAX9021/MAX9022/MAX9024

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (VDDto VSS) ....................................-0.3V to +6V

Voltage Inputs (IN+, IN- to V

). ................-0.3V to (VDD+ 0.3V)

Differential Input Voltage (IN+ to IN-)....................................6.6V

Current into Input Pins ......................................................±20mA

Output Short-Circuit Duration ..................2s to Either V

or V

Current into Any Pin ............................................................20mA

Continuous Power Dissipation (TA= +70°C)

5-Pin SC70 (derate 3.1mW/°C above +70°C)...............247mW

5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW

8-Pin SOT23 (derate 9.1mW/°C above +70°C).............727mW

8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW

8-Pin SO (derate 5.88mW/°C above +70°C).................471mW

14-Pin TSSOP (derate 9.1mW/°C above +70°C) ..........727mW

14-Pin SO (derate 8.3mW/°C above +70.......................667mW

Operating Temperature Range

Automotive Application...................................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range V

Guaranteed by PSRR test

2.5

5.5 V

S up p l y C ur r ent P er C om p ar ator I

2.8 5 µA

Input Offset Voltage V

(Note 2) ±1 ±8mV

Input Offset Voltage Temperature Coefficient

±1

µV/°C

Hysteresis (Note 3) 4 mV

Input Bias Current I

BIAS

380nA

Input Offset Current I

±2 ±60 nA

Common-Mode Voltage Range V

Guaranteed by CMRR test

C om m on- M od e Rej ecti on Rati o

S S

≤ V

C M

≤ ( V

D D

- 1.1V ) , V

D D

= 5.5V 70 100 d B

Power-Supply Rejection Ratio

= 2.5V to 5.5V 60 80 dB

SOURCE

= 10µA 2

VOH = VDD - V

OUT,

IN+

- V

IN-

) ≥ 20mV

SOURCE

= 4mA

400

SINK

= 10µA 2

Output-Voltage Swing

= V

OUT

- V

SS,

IN-

- V

IN+

) ≥ 20mV

SINK

= 4mA

400

Output Short-Circuit Current I

50 m A

VOD = 10mV 8

Propagation Delay

RL = 10kΩ, C

= 15pF (Note 4)

= 100mV 3

µs

Rise and Fall Time tR, t

RL = 10kΩ, CL = 15pF (Note 5) 20 ns

Power-On Time RL = 10kΩ, CL = 15pF

Maximum Capacitive Load C

No sustained oscillations

Note 1: All devices are production tested at 25°C. All temperature limits are guaranteed by design. Note 2: Comparator Input Offset is defined as the center of the hysteresis zone. Note 3: Hysteresis is defined as the difference of the trip points required to change comparator output states. Note 4: V

is the overdrive voltage beyond the offset and hysteresis-determined trip points.

Note 5: Rise and fall times are measured between 10% and 90% at OUT.

ELECTRICAL CHARACTERISTICS

(VDD= 5V, VSS= 0, VCM= 0, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

TCV

CMRR

PSRR

, V

, t

160

180

150

VDD - 1.1

MAX9021/MAX9022/MAX9024

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

Single-Supply Comparators

_______________________________________________________________________________________ 3

Typical Operating Characteristics

(VDD= 5V, VSS= 0, VCM= 0, RL= 10kΩ, CL= 15pF, VOD= 100mV, TA= +25°C, unless otherwise noted.)

3.0

2.9

2.8

2.7

2.6 24356

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX9021/2/4 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

2.5

2.6

2.8

2.7

2.9

3.0

-50 0-25 25 50 75 100 125

SUPPLY CURRENT vs. TEMPERATURE

MAX9021/2/4 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

1000

0.01 1 1000

SUPPLY CURRENT

vs. OUTPUT TRANSITION FREQUENCY

100

MAX9021/2/4 toc03

OUTPUT TRANSITION FREQUENCY (kHz)

SUPPLY CURRENT (µA)

0.1

100

0.4

0.2

0.8

0.6

1.2

1.0

1.4

-50 0 25-25 50 75 100 125

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

MAX9021/2/4 toc04

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE (mV)

100

200

300

400

500

0426810

OUTPUT HIGH VOLTAGE

vs. SOURCE CURRENT

MAX9021/2/4 toc05

SOURCE CURRENT (mA)

- V

OUT

) (mV)

100

200

300

400

500

0426810

OUTPUT LOW VOLTAGE

vs. SINK CURRENT

MAX9021/2/4 toc06

SINK CURRENT (mA)

OUTPUT LOW VOLTAGE (mV)

-50 0-25 25 50 75 100 125

OUTPUT SHORT-CIRCUIT CURRENT

vs. TEMPERATURE

MAX9021/2/4 toc07

TEMPERATURE (°C)

OUTPUT SHORT-CIRCUIT CURRENT (mA)

SOURCE CURRENT

SINK CURRENT

PROPAGATION DELAY vs. CAPACITIVE LOAD

= 2.7V)

MAX9021/2/4 toc08

CAPACITIVE LOAD (pF)

PROPAGATION DELAY (µs)

tPD-

tPD+

500 1000

1500

2000

PROPAGATION DELAY vs. CAPACITIVE LOAD

= 5V)

MAX9021/2/4 toc09

CAPACITIVE LOAD (pF)

PROPAGATION DELAY (µs)

tPD-

0 500 1000

1500

2000

tPD+

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