Rainbow Electronics MAX9077 User Manual

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.

General Description

The MAX9075/MAX9077 single/dual comparators are
optimized for 3V and 5V single-supply applications.
These comparators have a 580ns propagation delay and
consume just 3µA per comparator. The combination of
low-power, single-supply operation down to 2.1V, and
ultra-small footprint makes these devices ideal for all
portable applications.

The MAX9075/MAX9077 have a common-mode input
voltage range of -0.2V to VCC- 1.2V. Unlike many com­parators, there is no differential clamp between the
inputs, allowing the differential input voltage range to
extend Rail-to-Rail®. All inputs and outputs tolerate a
continuous short-circuit fault condition to either rail.

The design of the output stage limits supply-current
surges while switching (typical of many other compara­tors), minimizing power consumption under dynamic
conditions. Large internal push-pull output drivers allow
rail-to-rail output swing with loads up to 2mA, making
these devices ideal for interface with TTL/CMOS logic.

The MAX9075 single comparator is available in 5-pin
SC70 and SOT23 packages, while the MAX9077 dual
comparator is available in 8-pin SOT23, µMAX, and SO
packages.

Applications

Battery-Powered Systems

Threshold Detectors/Discriminators

Keyless Entry Systems

IR Receivers

Digital Line Receivers

Features

♦ 580ns Propagation Delay from Only 3µA

♦ 2.1V to 5.5V Single-Supply Operation

♦ Ground-Sensing Inputs

♦ Rail-to-Rail Outputs

♦ No Output Phase Inversion for Overdriven Inputs

♦ No Differential Clamp Across Inputs

♦ Available in Ultra-Small Packages

5-Pin SC70 (MAX9075)
8-Pin SOT23 (MAX9077)

MAX9075/MAX9077

Low-Cost, Ultra-Small, 3µA

Single-Supply Comparators

________________________________________________________________ Maxim Integrated Products 1

19-1547; Rev 1; 9/01

Ordering Information

Typical Operating Circuit

Pin Configurations

Pin Configurations continued at end of data sheet.

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

PART TEMP RANGE

MAX9075EXK-T -40°C to +85°C 5 SC70-5 AAC

MAX9075EXK-T -40°C to +85°C 5 SOT23-5 ADLX

MAX9077EKA-T -40°C to +85°C 8 SOT23-8 AAAD

MAX9077EUA -40°C to +85°C 8 µMAX —

MAX9077ESA -40°C to +85°C 8 SO —

PIN­PACKAGE

TOP

MARK

V

CC

TOP VIEW

15V

OUT

GND

MAX9075

2

34

SC70-5/SOT23-5

CC

IN-IN+

V

IN

V

CC

IN+

IN-

V

REF

MAX9075
MAX9077

OUT

GND

VCC= 5V

MAX9075/MAX9077

Low-Cost, Ultra-Small, 3µA
Single-Supply Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= 5V, VCM= -0.2V, TA= T

MIN

to T

MAX

, 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.

Note 1: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2: Inferred from CMRR. Either input can be driven to the absolute maximum limit without output inversion, as long as the other

input is within the input voltage range.

Note 3: Guaranteed by design.

Supply Voltage

V

CC

to GND........................................................................6V

All Other Pins to GND...........................-0.3V to (V

CC

+ 0.3V)

Duration of Output Short-Circuit to GND or V

CC

........Continuous

Continuous Power Dissipation (T

A

= +70°C)

5-Pin SC70 (derate 2.5mW/°C above +70°C)............200mW

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

8-Pin SOT23 (derate 5.3mW/°C above +70°C)..........421mW

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

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

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

C

LOAD

= 10pF

-0.2V ≤ VCM≤ (VCC- 1.2V)

C

LOAD

= 10pF, overdrive = 100mV

C

LOAD

= 10pF, overdrive = 100mV

VCM= 0 (Note 3)

VCC= 3V

2.1V ≤ VCC≤ 5.5V

(Note 2)

I

SINK

= 2mA

I

SOURCE

= 2mA

CONDITIONS

ns

1.6

Rise/Fall Time

ns

250

t

PD-

Propagation Delay High to Low

ns

580

t

PD+

Propagation Delay Low to High

V

0.4

V

OL

OUT_ Output Voltage Low

V

VCC-

0.4

V

OH

OUT_ Output Voltage High

6.6

3 5.2

I

CC

V

2.1 5.5

V

CC

Operating Supply Voltage Range

Supply Current per Comparator

dB

60 82

CMRRCommon-Mode Rejection Ratio

pF

3

C

IN

Input Capacitance

nA-5 -20I

B

Input Bias Current

nA

1

I

OS

Input Offset Current

2.4

dB

54 77

PSRRPower-Supply Rejection Ratio

V

-0.2

V

CC

-

1.2

V

CMR

Common-Mode Voltage Range

mV

±1 ±8

V

OS

Input Offset Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

TA= +25°C

TA= T

MIN

to T

MAX

VCC= 5V

µA

MAX9075/MAX9077

Low-Cost, Ultra-Small, 3µA

Single-Supply Comparators

_______________________________________________________________________________________ 3

Typical Operating Characteristics

(VCC= 5V, VCM= 0, 100mV overdrive, TA= +25°C, unless otherwise noted.)

OUTPUT VOLTAGE LOW vs.

SINK CURRENT (V

3.0

2.5

2.0

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

0

TA = +25°C

TA = +85°C

01051520

SINK CURRENT (mA)

= 2.1V)

CC

MAX9075/7 toc01

TA = -40°C

OUTPUT VOLTAGE HIGH vs.

SOURCE CURRENT (V

2.5

2.0

1.5
TA = +85°C

1.0

0.5

OUTPUT VOLTAGE (V)

-0.5

TA = +25°C

0

0426810

SOURCE CURRENT (mA)

= 2.1V)

CC

TA = -40°C

12 14 16 18

MAX9075/7 toc04

4.0

3.5

3.0

2.5

2.0

1.5

OUTPUT VOLTAGE (V)

1.0

0.5

3.5

3.0

2.5

2.0

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

-0.5

OUTPUT VOLTAGE LOW vs.

SINK CURRENT (V

TA = +25°C

TA = +85°C

0

0105 152025303540

SINK CURRENT (mA)

CC

OUTPUT VOLTAGE HIGH vs.

SOURCE CURRENT (V

TA = -40°C

TA = +85°C

TA = +25°C

0

0105152025

SOURCE CURRENT (mA)

30 35 40 45

= 3V)

TA = -40°C

= 3V)

CC

7

6

MAX9075/7 toc02

5

4

3

OUTPUT VOLTAGE (V)

2

1

0

6

5

MAX9075/7 toc05

4

3

2

OUTPUT VOLTAGE (V)

1

0

-1

OUTPUT VOLTAGE LOW vs.

SINK CURRENT (V

TA = +25°C

TA = +85°C

02010 30 40 50

SINK CURRENT (mA)

OUTPUT VOLTAGE HIGH vs.

SOURCE CURRENT (V

TA = +85°C

TA = +25°C

02010 30 40 50

SOURCE CURRENT (mA)

= 5V)

CC

TA = -40°C

60 70 80 90

= 5V)

CC

TA = -40°C

60 70 80 90 100

MAX9075/7 toc03

MAX9075/7 toc06

SHORT-CIRCUIT SINK CURRENT

vs. TEMPERATURE

90

80

70

60

50

40

30

SINK CURRENT (mA)

20

10

0

-55 -35 -15 5 25 45 65 85

VCC = 5V

VCC = 3V

VCC = 2.1V

TEMPERATURE (°C)

100

90

MAX9075 toc07

80

70

60

50

40

30

SOURCE CURRENT (mA)

20

10

0

SHORT-CIRCUIT SOURCE CURRENT

vs. TEMPERATURE

VCC = 5V

VCC = 3V

VCC = 2.1V

-55 -35 -15 5 25 45 65 85
TEMPERATURE (°C)

MAX9075 toc08

SUPPLY CURRENT vs.

TEMPERATURE (OUT = HIGH)

4.5

4.0

3.5

3.0

2.5

2.0

1.5

SUPPLY CURRENT (µA)

1.0

0.5

0

-55 -35 -15 5 25 45 65 85

VCC = 5V

VCC = 3V

VCC = 2.1V

TEMPERATURE (°C)

MAX9075 toc09