MAXIM MAX985, MAX986, MAX989, MAX990, MAX993 User Manual

General Description

The MAX985/MAX986/MAX989/MAX990/MAX993/
MAX994 single/dual/quad micropower comparators
feature low-voltage operation and rail-to-rail inputs and
outputs. Their operating voltages range from 2.5V to

5.5V, making them ideal for both 3V and 5V systems.
These comparators also operate with ±1.25V to ±2.75V
dual supplies. They consume only 11µA of supply cur­rent while achieving a 300ns propagation delay.

Input bias current is typically 1.0pA, and input offset
voltage is typically 0.5mV. Internal hysteresis ensures
clean output switching, even with slow-moving input
signals.

The output stage’s unique design limits supply-current
surges while switching, virtually eliminating the supply
glitches typical of many other comparators. The
MAX985/MAX989/MAX993 have a push-pull output
stage that sinks as well as sources current. Large inter­nal output drivers allow rail-to-rail output swing with
loads up to 8mA. The MAX986/MAX990/MAX994 have
an open-drain output stage that can be pulled beyond
VCCto 6V (max) above VEE. These open-drain versions
are ideal for level translators and bipolar to single­ended converters.

The single MAX985 is available in a chip-scale pack­age (UCSP™), significantly reducing the required PC
board area. The single MAX985/MAX986 are available
in 5-pin SC70 packages and the dual MAX989/MAX990
are available in 8-pin SOT23 packages.

____________________________Features

♦ 11µA Quiescent Supply Current

♦ 2.5V to 5.5V Single-Supply Operation

♦ Common-Mode Input Voltage Range Extends

250mV Beyond the Rails

♦ 300ns Propagation Delay

♦ Push-Pull Output Stage Sinks and Sources

8mA Current (MAX985/MAX989/MAX993)

♦ Open-Drain Output Voltage Extends Beyond V

CC

(MAX986/MAX990/MAX994)

♦ Unique Output Stage Reduces Output Switching

Current, Minimizing Overall Power Consumption

♦ 80µA Supply Current at 1MHz Switching

Frequency

♦ No Phase Reversal for Overdriven Inputs

♦ Available in Space-Saving Packages:

UCSP (MAX985)
SOT23 (MAX985/MAX986/MAX989/MAX990)

µMAX

®

(MAX989/MAX990)

MAX985/MAX986/MAX989/MAX990/MAX993/MAX994

Micropower, Low-Voltage, UCSP/SC70,

Rail-to-Rail I/O Comparators

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

(BUMPS ON BOTTOM)

UCSP

MAX985

B1

B2

B3

A1

A2

A3

IN+

IN-

N.C.

V

EE

OUT

V

CC

Pin Configurations

19-1229; Rev 4; 1/07

Ordering Information

Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.

Pin Configurations continued at end of data sheet.

Portable/Battery­Powered Systems

Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators

Threshold Detectors/
Discriminators

Ground/Supply-Sensing
Applications

IR Receivers
Digital Line Receivers

PART

PIN-PACKAGE

TOP

MARK

PKG

CODE

MAX985EBT-T 6 UCSP-6

AAY

B6-1

MAX985EXK-T 5 SC70-5

ABK

X5-1

Applications

Selector Guide

PART

COMPARATORS

PER PACKAGE

OUTPUT

STAGE

MAX985 1 Push-Pull

MAX986 1 Open-Drain

MAX989 2 Push-Pull

MAX990 2 Open-Drain

MAX993 4 Push-Pull

MAX994 4 Open-Drain

UCSP is a trademark and 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.

Note: All devices are specified over the -40°C to +85°C operating

temperature range.

MAX985/MAX986/MAX989/MAX990/MAX993/MAX994

Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= 2.7V to 5.5V, VEE= 0V, VCM= 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

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 (VCCto VEE) ...................................................6V

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

IN_-, IN_+ to V

EE

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

OUT_ to V

EE

MAX985/MAX989/MAX993 ....................-0.3V to (VCC+ 0.3V)

MAX986/MAX990/MAX994.....................................-0.3V to 6V

OUT_ Short-Circuit Duration to V

EE

or VCC...........................10s

Continuous Power Dissipation (T

A

= +70°C)

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

5-Pin SOT23 (derate 7.10mW/°C above +70°C)...........571mW

6-Bump UCSP (derate 3.9mW/°C above +70°C)..........308mW

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 8.33mW/°C above +70°C)...............667mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

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

Bump Reflow Temperature .............................................+235°C

Inferred from PSRR test

CONDITIONS

V2.5 5.5V

CC

Supply Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

12 20

2.5V ≤ VCC≤ 5.5V dB55 80PSRRPower-Supply Rejection Ratio

VCC= 5V

24

mV

±0.5 ±5

TA= +25°C

VEE-V

CC

+

0.25 0.25

±3V

HYST

Input Hysteresis

Full common-mode
range

nAI

B

Input Bias Current
(Note 4)

0.001 10

pF1.0C

IN

Input Capacitance

dB52 80CMRRCommon-Mode Rejection Ratio

pA0.5I

OS

Input Offset Current

±7

V

OS

Input Offset Voltage
(Note 3)

V

OUT

= high µA1.0I

LEAK

Output Leakage Current
(MAX986/MAX990/
MAX994 only)

35

95

TA= +25°C

TA= -40°C to +85°C

11 20

VCC= 2.7V

µA

24

I

CC

Supply Current per
Comparator

TA= +25°C

TA= -40°C to +85°C

Sourcing or sinking,
V

OUT

= V

EE

or V

CC

I

SC

Output Short-Circuit Current

TA= +25°C

TA= -40°C to +85°C

TA= -40°C to +85°C V

EE

V

CC

VV

CMR

Common-Mode Voltage
Range (Note 2)

mV

VCC= 5V

VCC= 2.7V

mA

VCC= 5V,
I

SINK

= 8mA

0.55

0.2 0.4

V

OL

OUT Output Voltage Low

VCC= 2.7V,
I

SINK

= 3.5mA

V

0.4

0.15 0.3

TA= +25°C

TA= -40°C to +85°C

TA= +25°C

TA= -40°C to +85°C

MAX985/MAX986/MAX989/MAX990/MAX993/MAX994

Micropower, Low-Voltage, UCSP/SC70,

Rail-to-Rail I/O Comparators

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= 2.7V to 5.5V, VEE= 0V, VCM= 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

µs20t

PU

Power-Up Time

nsVCC= 5.0V

80

t

FALL

OUT Fall Time 50

40

300

450

100mV overdrive

100mV overdrive

CL= 15pF

300

t

PD+

Propagation Delay

450

ns

450

t

PD-

300

MAX985/MAX989/
MAX993 only

10mV overdrive

100mV overdrive

MAX985/MAX989/
MAX993 only, C

L

= 15pF

10mV overdrive

10mV overdrive

CL= 15pF

CL= 50pF

CL= 200pF

MAX986/MAX990/
MAX994 only,
R

PULLUP

= 5.1kΩ

Note 1: All device specifications are 100% production tested at TA= +25°C. Limits over the extended temperature range are guar-

anteed by design.

Note 2: Inferred from the V

OS

test. Both or either inputs can be driven 0.3V beyond either supply rail without output phase reversal.

Note 3: V

OS

is defined as the center of the hysteresis band at the input.

Note 4: I

B

is defined as the average of the two input bias currents (IB-, IB+).

CL= 15pF

CL= 50pF

CL= 200pF

VCC= 5.0V ns

80

t

RISE

OUT Rise Time
(MAX985/MAX989/
MAX993 only)

50

40

VCC= 5V,
I

SOURCE

= 8mA

V

4.6 4.85

V

OH

OUT Output Voltage High
(MAX985/MAX989/
MAX993 only)

TA= +25°C

4.45TA= -40°C to +85°C

VCC= 2.7V,
I

SOURCE

= 3.5mA

2.4 2.55TA= +25°C

2.3TA= -40°C to +85°C

MAX985/MAX986/MAX989/MAX990/MAX993/MAX994

Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(VCC= 5V, VCM= 0V, TA= +25°C, unless otherwise noted.)

10,000

1

0.01 0.1 1 10 100

OUTPUT LOW VOLTAGE

vs. OUTPUT SINK CURRENT

MAX985-04

OUTPUT SINK CURRENT (mA)

OUTPUT LOW VOLTAGE (mV) (V

OL

)

10

100

1000

V

IN+

< V

IN-

VCC = 2.7V

V

CC

= 5.0V

600

350

0 200 1000

PROPAGATION DELAY

vs. CAPACITIVE LOAD (V

CC

= 3V)

500

450

400

550

MAX985-05a

CAPACITIVE LOAD (pF)

t

PD

(ns)

400

800600

VOD = 50mV

TO V

OUT

= 50% OF

FINAL VALUE

TO V

OUT

= 10% OF

FINAL VALUE

120

0

-60 100

OUTPUT SHORT-CIRCUIT

CURRENT vs. TEMPERATURE

20
10

90

80

110

100

MAX985-06

TEMPERATURE (°C)

OUTPUT SINK CURRENT (mA)

-40 -20 0 20 40 60 80

70
60
50

40
30

VCC = 5.0V

VCC = 2.7V

530

350

0 200 1000

PROPAGATION DELAY

vs. CAPACITIVE LOAD (V

CC

= 5V)

450

430

410

390

370

510

490

470

MAX985-05b

CAPACITIVE LOAD (pF)

t

PD

(ns)

400

800600

VOD = 50mV

TO V

OUT

= 50% OF

FINAL VALUE

TO V

OUT

= 10% OF

FINAL VALUE

1.1

-0.3

-60 100

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

-0.1

0.7

0.9

MAX985-07

TEMPERATURE (°C)

OFFSET VOLTAGE (mV)

-40-200 20406080

0.5

0.3

0.1

10,000

0.1

0.01

0.1

110100

OUTPUT HIGH VOLTAGE

vs. OUTPUT SOURCE CURRENT

1

MAX985-08

OUTPUT SOURCE CURRENT (mA)

OUTPUT HIGH VOLTAGE (V

CC

- V

OH

)

(mV)

10

100

1000

V

IN+

> V

IN-

VCC = 5.0V

VCC = 2.7V

18

8

-60 100

SUPPLY CURRENT

vs. TEMPERATURE

10

9

16

17

15

MAX985-01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

-40-200 20406080

14

13

12

11

V

IN+

> V

IN-

VCC = 5.0V

VCC = 2.7V

1000

1

0.01 0.1 1 10 100 1000

SUPPLY CURRENT vs.

OUTPUT TRANSITION FREQUENCY

MAX985-02

OUTPUT TRANSITION FREQUENCY (kHz)

SUPPLY CURRENT (µA)

10

100

VCC = 5.0V

VCC = 2.7V