Rainbow Electronics MAX996 User Manual

________________General Description

The MAX987/MAX988/MAX991/MAX992/MAX995/
MAX996 single/dual/quad micropower comparators
feature low-voltage operation and Rail-to-Rail®inputs
and outputs. Their operating voltage ranges 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 48µA per
comparator while achieving a 120ns 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
MAX987/MAX991/MAX995 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 MAX988/MAX992/MAX996 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 MAX987/MAX988 are available in tiny 5-pin
SC70 packages, while the dual MAX991/MAX992 are
available in ultra-small 8-pin SOT23 packages.

____________________________Features

♦ 120ns Propagation Delay

♦ 48µA Quiescent Supply Current

♦ +2.5V to +5.5V Single-Supply Operation

♦ Common-Mode Input Voltage Range Extends

250mV Beyond the Rails

♦ Push/Pull Output Stage Sinks and Sources

8mA Current (MAX987/MAX991/MAX995)

♦ Open-Drain Output Voltage Extends Beyond V

CC

(MAX988/MAX992/MAX996)

♦ Unique Output Stage Reduces Output Switching

Current, Minimizing Overall Power Consumption

♦ 100µA Supply Current at 1MHz Switching

Frequency

♦ No Phase Reversal for Overdriven Inputs

♦ Available in Space-Saving Packages:

5-Pin SOT23 (MAX987/MAX988)
8-Pin µµMAX (MAX991/MAX992)

MAX987/MAX988/MAX991/MAX992/MAX995/MAX996

High-Speed, Micropower, Low-Voltage,

SOT23, Rail-to-Rail I/O Comparators

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

19-1266; Rev 1; 1/01

_______________Ordering Information

Ordering Information continued at end of data sheet.

Typical Application Circuit appears at end of data sheet.

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.

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
IR Receivers
Digital Line Receivers

Selector Guide

Applications

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

PART

MAX987 1 Push/Pull

MAX988 1 Open-Drain

MAX991 2 Push/Pull

MAX992 2 Open-Drain

MAX995 4 Push/Pull

MAX996 4 Open-Drain

COMPARATORS

PER PACKAGE

OUTPUT

STAGE

PART TEMP. RANGE

MAX987EXK-T -40°C to +85°C 5 SC70-5 ABM

MAX987EUK-T -40°C to +85°C 5 SOT23-5 ABZB

MAX987ESA -40°C to +85°C 8 SO —

PIN-

PACKAGE

TOP

MARK

TOP VIEW

OUT

1

5

V

EE

CC

MAX988

MAX987

2

V

3

IN+

SOT23/SC70

IN-

4

MAX987/MAX988/MAX991/MAX992/MAX995/MAX996

High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS (Note 1)

(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.)

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

IN_-, IN_+ to V

EE

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

OUT_ to V

EE

MAX987/MAX991/MAX995 ....................-0.3V to (VCC+ 0.3V)

MAX988/MAX992/MAX996.....................................-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

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

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

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

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

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

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

Inferred from PSRR test

CONDITIONS

V2.5 5.5V

CC

Supply Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

53 80

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

VCC= 5V

96

mV

±0.5 ±5

TA= +25°C

VEE-V

CC

+

0.25 0.25

±2.5V

HYST

Input Hysteresis

Full common-mode
range

nAI

B

Input Bias Current
(Note 4)

0.001 10

pF1.0C

IN

Input Capacitance

dB50 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
(MAX988/MAX992/
MAX996 only)

35

95

TA= +25°C

TA= -40°C to +85°C

48 80

VCC= 2.7V

µA

96

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

TA= +25°C

VCC= 5V,
I

SOURCE

= 8mA

TA= -40°C to +85°C 4.45

4.6 4.85

V

OH

TA= +25°C

OUT Output Voltage High
(MAX987/MAX991/
MAX995 only)

VCC= 2.7V,
I

SOURCE

= 3.5mA

TA= -40°C to +85°C

V

2.3

2.4 2.55

MAX987/MAX988/MAX991/MAX992/MAX995/MAX996

High-Speed, Micropower, Low-Voltage,

SOT23, 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.)

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

VCC= 5.0V ns

40

t

RISE

OUT Rise Time
(MAX987/MAX991/
MAX995 only)

20

15

µs25t

PU

Power-Up Time

nsVCC= 5.0V

40

t

FALL

OUT Fall Time 20

15

120

210

100mV overdrive

100mV overdrive

CL= 15pF,
VCC= 5V

120

t

PD+

Propagation Delay

210

ns

210

t

PD-

120

MAX987/MAX991/
MAX995 only

10mV overdrive

100mV overdrive

MAX987/MAX991/MAX995
only, C

L

= 15pF, VCC= 5V

10mV overdrive

10mV overdrive

CL= 15pF

CL= 50pF

CL= 200pF

CL= 15pF

CL= 50pF

CL= 200pF

MAX988/MAX992/
MAX996 only,
R

PULL-UP

= 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, not production tested.

Note 2: Inferred from the V

OS

test. Either or both 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+).

Typical Operating Characteristics

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

30

40

50

60

70

80

90

-60 -20-40 0 20406080100

SUPPLY CURRENT PER COMPARATOR

vs. TEMPERATURE

MAX9879 TOC1

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VCC = 5.5.V

VCC = 2.5.V

V

IN+

> V

IN-

1000

10

0.01 0.1 1 10 100 1000 10,000

SUPPLY CURRENT PER COMPARATOR
vs. OUTPUT TRANSITION FREQUENCY

MAX987 TOC2

OUTPUT TRANSITION FREQUENCY (kHz)

SUPPLY CURRENT (µA)

100

VCC = 2.5V

VCC = 5.5V

MAX987/MAX988/MAX991/MAX992/MAX995/MAX996

High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators

4 _______________________________________________________________________________________

OUTPUT LOW VOLTAGE

10,000

1000

)

OH

100

- V

CC

10

(mV) (V

OUTPUT HIGH VOLTAGE

1

0.1

0.01

120
110
100

90

80
70
60
50

40
30

OUTPUT SINK CURRENT (mA)

20
10

0

-60 100

OUTPUT HIGH VOLTAGE

vs. OUTPUT SOURCE CURRENT

V

> V

IN+

IN-

VCC = 2.7V

VCC = 5.0V

0.1

OUTPUT SOURCE CURRENT (mA)

1 10 100

OUTPUT SHORT-CIRCUIT

CURRENT vs. TEMPERATURE

VCC = 5.0V

-40 -20 0 20 40 60 80

VCC = 2.7V

TEMPERATURE (°C)

MAX987-04

MAX987 05

10,000

)

OL

OUTPUT LOW VOLTAGE (mV) (V

V

< V

IN+

IN-

1000

VCC = 2.7V

100

10

1

0.01 0.1 1 10 100
OUTPUT SINK CURRENT (mA)

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

1.1

0.9

0.7

0.5

0.3

OFFSET VOLTAGE (mV)

0.1

-0.1

-0.3

-60 100

-40 -20 0 20 40 60 80
TEMPERATURE (°C)

vs. OUTPUT SINK CURRENT

MAX987-03a

V

= 5.0V

CC

MAX987 06