Datasheet MAX9052AESA, MAX9051AESA, MAX9051AEUT-T, MAX9051BESA, MAX9043AEUB Datasheet (Maxim)

General Description

The MAX9040–MAX9043 and MAX9050–MAX9053 fea­ture combinations of low-power comparators and a pre­cision voltage reference. Their operating voltage range
makes them ideal for both +3V and +5V systems. The
MAX9040/MAX9041/MAX9050/MAX9051 have a single
comparator and reference consuming only 40µA of
supply current. The MAX9042/MAX9043/MAX9052/
MAX9053 have dual comparators and a reference,
while consuming only 55µA of supply current. Low-volt­age operation and low supply current make these
devices ideal for battery-operated systems.

The comparators feature Rail-to-Rail

®

inputs and out­puts, with a common-mode input voltage range that
extends 250mV beyond the supply rails. 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 features a unique design that limits supply
current surges while switching, virtually eliminating sup­ply glitches typical of many other comparators. This
design also minimizes overall power consumption
under dynamic conditions. The comparator outputs
have rail-to-rail push-pull output stages that sink and
source up to 8mA. The propagation delay is 400ns,
even with the low operating supply current.

The reference output voltage is set to 2.048V in the
MAX9040–MAX9043 and to 2.500V in the MAX9050–
MAX9053. These devices are offered in two grades: an
A grade with 0.4% initial accuracy and 6ppm/°C
tempco, and a B grade with 1% initial accuracy and
100ppm/°C tempco. The voltage reference features a
proprietary curvature-correction circuit and laser­trimmed thin-film resistors. The series-mode references
can sink or source up to 500µA of load current.

Applications

Precision Battery Management

Window Comparators

IR Receivers

Level Translators

Digital Line Receivers

Features

♦ Comparator + Precision Reference in SOT23

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

(MAX9040–MAX9043)

♦ Low Supply Current (MAX9042/43/52/53)

55µA Quiescent
65µA with 100kHz Switching

♦ 400ns Propagation Delay

♦ Rail-to-Rail Inputs

♦ Rail-to-Rail Output Stage Sinks and Sources 8mA

♦ Internal ±3mV Hysteresis

♦ Voltage Reference Offers

±0.4% max Initial Accuracy (MAX90_ _A)
6ppm/°C typ Temperature Coefficient
Stable for 0 to 4.7nF Capacitive Loads

Ordering Information continued at end of data sheet.

*Future product—contact factory for availability.

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,

SOT23 Comparator + Precision Reference ICs

________________________________________________________________ Maxim Integrated Products 1

19-1569; Rev 1; 1/00

Ordering Information

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

Typical Operating Circuit appears at end of data sheet.

Functional Diagrams appear at end of data sheet.

Selector Guide appears at end of data sheet.

Pin Configurations

Pin Configurations continued at end of data sheet.

PIN-

PACKAGE

5 SOT23-5

5 SOT23-5

6 SOT23-6

6 SOT23-6

8 SO

8 SO

8 µMAX
8 µMAX
8 SO
8 SO
10 µMAX

10 µMAX-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGEPART

MAX9040AEUK-T

MAX9040BEUK-T

MAX9041AEUT-T*

MAX9041BEUT-T*

MAX9041AESA*

MAX9041BESA*

MAX9042AEUA
MAX9042BEUA
MAX9042AESA
MAX9042BESA
MAX9043AEUB

MAX9043BEUB

TOP

MARK

ADNV

ADNX

AAHF

AAHH

—

—

—
—
—
—
—

—

TOP VIEW

15V

OUT

V

MAX9040

2

EE

MAX9050

CC

34

SOT23-5

REFIN+

dB

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—A Grade (0.4% initial accuracy)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, 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.

Supply Voltage (VCCto VEE) ....................................-0.3V to +6V

All Other Pins ...................................(V

EE

- 0.3V) to (VCC+ 0.3V)

Output Short-Circuit Duration

(OUT_, REF) .............Indefinite Short Circuit to Either Supply

Continuous Power Dissipation (T

A

= +70°C)

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

6-Pin SOT23 (derate 8.70mW/°C above +70°C)........696mW

8-Pin µMAX (derate 4.1mW/°C above +70°C) ...........330mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) .........444mW

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

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

VCC= 2.7V 35

VCC= 5V

2.3 2.55VCC= 2.7V, I

SOURCE

= 3.5mA

TA = -40°C to +85°C

TA= +25°C

VCC= 5.0V

VCC= 2.7V

VCC= 5.0V

VCC= 2.7V

PARAMETER SYMBOL MIN TYP MAX UNITS

60 85

55 80

Supply Current I

CC

45 60

µA

Input Offset Voltage (Note 3) V

OS

±0.5 ±5.0

mV

±7.0

Input Hysteresis V

HYST

±3.0 mV

Input Bias Current
(Notes 4, 5, 6)

I

B

±0.001 ±10.0 nA

Supply Voltage Range (Note 2) V

CC

2.5 5.5
V

2.7 5.5

40 55

Input Offset Current (Note 4) I

OS

±0.5 pA

Common-Mode Voltage Range
(Notes 4, 7)

CMVR

VEE- 0.25 V

CC

+ 0.25

V

V

EE

V

CC

Common-Mode Rejection Ratio
(Note 4)

CMRR 52 80

Power-Supply Rejection Ratio PSRR

55 80

55 80

Input Capacitance (Note 4) C

IN

2.5 pF

Output Short-Circuit Current I

SC

95

mA

Output Voltage Low V

OL

0.2 0.55
V

0.15 0.4

Output Voltage High V

OH

4.45 4.85
V

CONDITIONS

Specified common-mode range

TA= +25°C

Over entire common­mode range

TA= -40°C to +85°C

Specified common-mode range

Specified common-mode range

MAX9040–MAX9043, 2.5V ≤ VCC≤ 5.5V
MAX9050–MAX9053, 2.7V ≤ VCC≤ 5.5V

MAX9040–MAX9043

MAX9050–MAX9053

V

OUT

= VEEor V

CC

MAX9040/MAX9041/
MAX9050/MAX9051

VCC= 5V, I

SINK

= 8mA

VCC= 2.7V, I

SINK

= 3.5mA

VCC= 5V, I

SOURCE

= 8mA

dB

MAX9042/MAX9043/
MAX9052/MAX9053

COMPARATORS

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,

SOT23 Comparator + Precision Reference ICs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—A Grade (0.4% initial accuracy) (continued)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 1)

ELECTRICAL CHARACTERISTICS—B Grade (1% initial accuracy)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 1)

2.7V ≤ VCC≤ 5.5V, MAX9050–MAX9053

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

CL= 15pF,
V

CC

= 2.7V

CL = 200pF

CL = 50pF

CL = 15pF

ns

450

tPD+/tPD-

Output Propagation Delay
(Note 8)

80

ns

50

Output Rise/Fall Times

40

tR/t

F

TA= +25°C

Time to V

OUT

valid logic state

V

2.040 2.048 2.056

V

REF

Output Voltage

µs20t

PU

Power-Up Time

2.5V ≤ VCC≤ 5.5V, MAX9040–MAX9043

µV/µA

∆V

REF

/

∆I

REF

Load Regulation

+50 +200

µV/V

+50 +200

∆V

REF

/

∆V

CC

Line Regulation

ppm/°C630TCV

REF

Output Voltage Temperature
Coefficient (Note 9)

2.490 2.500 2.510

50mV overdrive

MAX9040–MAX9043

MAX9050–MAX9053

1000h at TA= +25°C

V

REF

= VEEor V

CC

Sourcing: 0 ≤ I

REF

≤ 500µA

50Long-Term Stability

ppm130T

HYST

Thermal Hysteresis (Note 10)

mA4I

SC

Output Short-Circuit Current

24

400100mV overdrive

f = 0.1Hz to 10Hz µVp-p40

E

OUT

Noise Voltage

To V

REF

= 1% of final value

VCC= 5V ±100mV, f = 120Hz

f = 10Hz to 10kHz

nF0 4.7CL(V

REF

)

Capacitive Load Stability Range
(Note 6)

µs200tR(V

REF

)Turn-On Settling Time

dB84

∆V

REF

/

∆V

CC

Ripple Rejection

µV

RMS

105

ppm

3.5 6Sinking: -500µA ≤ I

REF

≤ 0

VOLTAGE REFERENCE

V

CC

I

CC

SYMBOL

VCC= 5.0V

VCC= 2.7V

VCC= 5.0V

VCC= 2.7V

MAX9040/MAX9041/
MAX9050/MAX9051

MAX9050–MAX9053

MAX9040–MAX9043

MAX9042/MAX9043/
MAX9052/MAX9053

CONDITIONS

40

2.7 5.5

V

2.5 5.5

Supply Voltage Range (Note 2)

45 100

µA

55

Supply Current

60 130

UNITSMIN TYP MAXPARAMETER

ns

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—B Grade (1% initial accuracy) (continued)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 1)

∆V

REF

/

∆l

REF

I

SC

T

HYST

tR/t

F

∆V

REF

/

∆V

CC

TCV

REF

V

REF

t

PD+/tPD-

t

PU

PSRR

CMVR

CMRR

V

OH

V

OL

C

IN

I

SC

I

OS

I

B

V

HYST

V

OS

SYMBOL

MAX9050–MAX9053

MAX9040–MAX9043

MAX9040–MAX9043

MAX9050–MAX9053

50mV overdrive

VCC= 2.7V

VCC= 5V

Sinking: -500µA ≤ I

REF

≤ 0

Sourcing: 0 ≤ I

REF

≤ 500µA

V

REF

= VEEor V

CC

1000h at TA= +25°C

3.5 6

µV/mA

24

+50 +200

Load Regulation

mA

4

Output Short-Circuit Current

ppm

130

Thermal Hysteresis (Note 10)

ppm

100

Long-Term Stability

CL= 200pF

CL= 50pF

CL= 15pF

2.5V ≤ VCC≤ 5.5V

TA= +25°C

CL= 15pF,
VCC= 2.7V

Time to V

OUT

valid logic state

80

ns

50

40

Output Rise/Fall Times

µV/V

+50 +200

Line Regulation

ppm/°C

20 100

Output Voltage Temperature
Coefficient (Note 9)

2.475 2.500 2.525

V

2.028 2.048 2.068

Output Voltage

450

Output Propagation Delay
(Note 8)

400

µs

µs

20

Power-Up Time

MAX9040–MAX9043, 2.5V ≤ VCC≤ 5.5V

Specified common-mode range

VCC= 2.7V, I

SOURCE

= 3.5mA

VCC= 5V, I

SOURCE

= 8mA

VCC= 2.7V, I

SINK

= 3.5mA

VCC= 5V, I

SINK

= 8mA

MAX9050–MAX9053, 2.7V ≤ VCC≤ 5.5V

dB

55 80

Power-Supply Rejection Ratio

dB

52 80

V

V

EE

V

CC

Common-Mode Voltage Range
(Notes 4, 7)

Common-Mode Rejection Ratio
(Note 4)

2.55

V

4.45 4.85

Output Voltage High

0.15

V

0.2 0.55

Output Voltage Low

55 80

pF

2.5

Input Capacitance (Note 4)

mA

95

Output Short-Circuit Current

35

Specified common-mode range

Specified common-mode range

Over entire common-mode range

CONDITIONS

pA

±0.5

Input Offset Current (Note 4)

nA

±0.001 ±25.0

Input Bias Current
(Notes 4, 5, 6)

mV

±3.0

Input Hysteresis

mV

±1 ±9.0

Input Offset Voltage (Note 3)

UNITSMIN TYP MAXPARAMETER

V

OUT

= VEEor V

CC

ns

100mV overdrive

COMPARATOR

VOLTAGE REFERENCE

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,

SOT23 Comparator + Precision Reference ICs

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—B Grade (1% initial accuracy) (continued)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 1)

Note 1: All devices are 100% production tested at T

A

= +25°C. Limits over the extended temperature range are guaranteed by

design, not production tested.

Note 2: Supply voltage range guaranteed by PSRR test on comparator and line regulation of REF.
Note 3: V

OS

is defined as the center of the input-referred hysteresis band.

Note 4: For the comparators with the inverting input (IN-) uncommitted.
Note 5: Input bias current is the average of the inverting and noninverting input bias currents.
Note 6: Not production tested. Guaranteed by design.
Note 7: Guaranteed by CMRR test.
Note 8: V

OVERDRIVE

is beyond the offset and hysteresis determined trip point.

Note 9: Temperature coefficient is measured by the box method; i.e., the maximum ∆V

REF

is divided by the maximum ∆T.

Note 10: Thermal hysteresis is defined as the change in V

REF

at +25°C before and after cycling the device from T

MIN

to T

MAX

.

Typical Operating Characteristics

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= +25°C, unless otherwise noted.)

0

10

30

20

50

40

60

-40 0-20 20 40 60 80

MAX9040/MAX9041/MAX9050/MAX9051

SUPPLY CURRENT vs. TEMPERATURE

MAX9040-3/50-3 toc01A

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VCC = +5.0V

V

IN+ > VIN-

VCC = +2.7V

0

10

30

20

50

40

60

-40 0-20 20 40 60 80

MAX9042/MAX9043/MAX9052/MAX9053

SUPPLY CURRENT vs. TEMPERATURE

MAX9040-3/50-3 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VCC = +5.0V

V

IN+ > VIN-

VCC = +2.7V

0.01 0.1 1 10 100 1000

200

150

100

50

0

MAX9040/MAX9041/MAX9050/MAX9051

SUPPLY CURRENT vs. SWITCHING FREQUENCY

MAX9040-3/50-3 toc02A

SWITCHING FREQUENCY (kHz)

SUPPLY CURRENT (µA)

VCC = +5.0V

VCC = +2.7V

CL(V

REF)

tR(V

REF)

∆V

REF

/

∆V

CC

E

OUT

SYMBOL

To V

REF

= 1% of final value

VCC= 5V ±100mV, f = 120Hz

f = 10Hz to 10kHz

f = 0.1Hz to 10Hz

nF

0 4.7

Capacitive Load Stability Range
(Note 6)

µs

200

Turn-On Settling Time

dB

84

Ripple Rejection

µVRMS

105

µVp-p

40

Noise Voltage

CONDITIONS UNITSMIN TYP MAXPARAMETER

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= +25°C, unless otherwise noted.)

250

0.01 0.1 1 10 100 1000

200

150

100

50

0

MAX9042/MAX9043/MAX9052/MAX9053

SUPPLY CURRENT vs. SWITCHING FREQUENCY

MAX9040-3/50-3 toc02

SWITCHING FREQUENCY (kHz)

SUPPLY CURRENT (µA)

VCC = +5.0V

VCC = +2.7V

10,000

1000

100

10

1

0.1

0.01 1 100.1

OUTPUT LOW VOLTAGE

vs. OUTPUT SINK CURRENT

MAX9040-3/50-3 toc03

OUTPUT SINK CURRENT (mA)

V

OL

(mV)

VCC = +5.0V

V

IN+ < VIN-

VCC = +2.7V

OUTPUT HIGH VOLTAGE

vs. OUTPUT SOURCE CURRENT

10,000

V

IN+ > VIN-

) (mV)

1000

OH

- V

CC

(V

100

10

1

OUTPUT HIGH VOLTAGE

0.1

0.01 1 100.1
OUTPUT SOURCE CURRENT (mA)

VCC = +2.7V

VCC = +5.0V

MAX9040-3/50-3 toc04

OUTPUT SHORT-CIRCUIT CURRENT

vs. TEMPERATURE

120

100

80

60

40

OUTPUT SINK CURRENT (mA)

20

0

-40 0-20 20 40 60 80

V

IN+ > VIN-

OUT SHORTED TO V

VCC = +5.0V

VCC = +2.7V

TEMPERATURE (°C)

EE

MAX9040-3/50-3 toc05

PROPAGATION DELAY

vs. CAPACITIVE LOAD (V

650

VOD = 50mV

600

550

500

(ns)

PD

t

450

400

350

300

0 400200 600 800100 500300 700 900 1000

t

TO V

PD+

OF FINAL VALUE

t

TO V

PD+

OF FINAL VALUE

t

TO V

= 50%

PD-

OUT

OF FINAL VALUE

CAPACITIVE LOAD (pF)

OUTPUT SHORT-CIRCUIT CURRENT

vs. TEMPERATURE

100

80

60

40

OUTPUT SOURCE CURRENT (mA)

20

0

-40 -20 0 20 40 60 80

= 5V)

CC

= 50%

OUT

= 10%

OUT

t

TO V

= 10%

PD-

OUT

OF FINAL VALUE

V

IN- > VIN+

OUT SHORTED TO V

TEMPERATURE (°C)

650

600

MAX9040-3/50-3 toc08

550

500

(ns)

PD

t

450

400

350

300

-40 0-20 20 40

CC

VCC = +5.0V

VCC = +2.7V

PROPAGATION DELAY

vs. TEMPERATURE

VOD = 50mV

t

TO V

PD+

= 10%

OUT

OF FINAL VALUE

TEMPERATURE (°C)

MAX9040-3/50-3 toc06

(ns)

PD

t

t

TO V

PD+

OUT

OF FINAL VALUE

t

PD-

OF FINAL VALUE

t

TO V

PD-

OUT

OF FINAL VALUE

PROPAGATION DELAY

vs. CAPACITIVE LOAD (V

600

VOD = 50mV

550

500

450

400

350

TO V

t

TO V

= 50%

PD+

OUT

OF FINAL VALUE

0 400200 600 800100 500300 700 900 1000

CAPACITIVE LOAD (pF)

= 50%

MAX9040-3/50-3 toc09

= 50%

OUT

= 10%

80

60

= 2.7V)

CC

t

TO V

PD-

OUT

OF FINAL VALUE

t

TO V

PD+

OF FINAL VALUE

t

TO V

PD-

OUT

OF FINAL VALUE

= 50%

OUT

MAX9040-3/50-3 toc07

= 10%

= 10%

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,

SOT23 Comparator + Precision Reference ICs

_______________________________________________________________________________________ 7

C)

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= +25°C, unless otherwise noted.)

200

400

300

600

500

800

700

900

08040 120 16020 10060 140 180 200

PROPAGATION DELAY

vs. INPUT OVERDRIVE

MAX9040-3/50-3 toc10

INPUT OVERDRIVE (mV)

t

PD

(ns)

t

PD+

, VCC = 5.0V

t

PD-

, VCC = 2.7V

t

PD-

, VCC = 5.0V

t

PD+

, VCC = 2.7V

B

A

100ns/div

PROPAGATION DELAY (t

PD+

)

MAX9040-3/50-3 toc11

A = IN+, 50mV/div
B = OUT, 2V/div

B

A

100ns/div

PROPAGATION DELAY (t

PD-

)

MAX9040-3/50-3 toc12

A = IN+, 50mV/div
B = OUT, 2V/div

SWITCHING CURRENT (OUT RISING EDGE)

A

B

MAX9040-3/50-3 toc13

SWITCHING CURRENT (OUT FALLING EDGE)

A

B

MAX9040-3/50-3 toc14

A

POWER-UP DELAY (OUT)

MAX9040-3/50-3 toc15

C

A = IN+, 100mV/div
B = OUT, 5V/div

, 1mA/div

C = I

CC

A

B

C

A = VCC, 2V/div
B = REF, 1V/div
C = REF, 50mV/div, 2.048V OFFSET

B

C

100ns/div

POWER-UP DELAY (REF)

100µs/div

A = IN+, 100mV/div
B = OUT, 5V/div
C = I

0.003
V

MAX9040-3/50-3 toc16

0.002

0.001

INPUT BIAS CURRENT (nA)

0

0 2.01.50.5 1.0 2.5 3.0 3.5 4.0 4.5 5.0

, 1mA/div

CC

INPUT BIAS CURRENT

vs. INPUT VOLTAGE

= +2.0V

IN-

100ns/div

V

(V)

IN+

A = VCC, 2V/div
B = OUT, 1V/div

REFERENCE OUTPUT VOLTAGE

1.00
THREE TYPICAL PARTS

NORMALIZED TO +25°C

0.75

0.50

I

B+

I

B-

MAX9040-3/50-3 toc17

0.25

0

-0.25

-0.50

OUTPUT VOLTAGE CHANGE (mV)

-0.75

-1.00

-40 0-20 20 40 60 80

5µs/div

TEMPERATURE DRIFT

TEMPERATURE (°

MAX9040-3/50-3 toc18

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs

8 _______________________________________________________________________________________

Pin Description

MAX9041
MAX9051

4——

6——

7——

8——

3——

1065

—4—

9——

1——

254

—33

SOT23-5

522

—11

µMAXSOT23-6

INA+

INB+

INB-

OUTB

INA-

V

CC

IN-

N.C.

OUTA

REF

IN+

V

EE

OUT

3

5

6

7

—

8

—

—

1

2

—

4

—

SO/µMAX

—

—

—

—

—

7

2

5, 8

—

1

3

4

6

SO

NAME

Comparator A Noninverting Input

Comparator B Noninverting Input

Comparator B Inverting Input

Comparator B Output

Comparator A Inverting Input

Positive Supply Voltage

Comparator Inverting Input

No Connection. Not internally connected.

Comparator A Output

Reference Voltage Output

Comparator Noninverting Input

Negative Supply Voltage

Comparator Output

PIN

MAX9043
MAX9053

MAX9040
MAX9050

MAX9042
MAX9052

FUNCTION

-200

-100

-150

0

-50

100

50

150

2.5 3.5 4.03.0 4.5 5.0 5.5

LINE REGULATION

MAX9040-3/50-3 toc19

INPUT VOLTAGE (V)

REFERENCE OUTPUT VOLTAGE CHANGE (µV)

TA = +25°C

TA = +85°C

TA = -40°C

-1500

-500

-1000

500

0

1500

1000

2000

-500 -100-300 100 300 500

LOAD REGULATION

MAX9040-3/50-3 toc20

LOAD CURRENT (µA)

REFERENCE OUTPUT VOLTAGE CHANGE (µV)

TA = +25°C

TA = +85°C

TA = -40°C

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0, VCM= 0, I

OUT

= 0, I

REF

= 0, TA= +25°C, unless otherwise noted.)

Detailed Description

The MAX9040–MAX9043 and MAX9050–MAX9053 fea­ture single/dual, low-power, low-voltage comparators
and a precision voltage reference. They operate from a
single +2.5V to +5.5V (MAX904_) or +2.7V to +5.5V
(MAX905_) supply. The single comparators with refer­ence (MAX9040/MAX9041/MAX9050/MAX9051) con­sume only 40µA of supply current, while the dual
comparators with reference (MAX9042/MAX9043/
MAX9052/MAX9053) consume only 55µA of supply cur­rent. Their common-mode input range extends 0.25V
beyond each rail. Internal hysteresis ensures clean out­put switching, even with slow-moving input signals.

The output stage employs a unique design that mini­mizes supply current surges while switching, virtually
eliminating the supply glitches typical of many other
comparators. Large internal output drivers allow rail-to­rail output swing that can sink and source up to 8mA of
current.

The precision reference uses a proprietary curvature­correction circuit and laser-trimmed thin-film resistors,
resulting in a temperature coefficient of less than
30ppm/°C over the extended temperature range and
initial accuracy of 0.4% (A grade). The reference output
voltage is set to 2.048V in the MAX9040–MAX9043 and
to 2.500V in the MAX9050–MAX9053.

Comparator Input Stage Circuitry

The devices’ input common-mode range extends from
(VEE- 0.25V) to (VCC+ 0.25V). These comparators may
operate at any differential input voltage within these lim­its. Input bias current is typically 1.0pA if the input volt-

age is between the supply rails. Comparator inputs are
protected from overvoltage by internal body diodes
connected to the supply rails. As the input voltage
exceeds the supply rails, these body diodes become
forward biased and begin to conduct. Consequently,
bias currents increase exponentially as the input volt­age exceeds the supply rails.

Comparator Output Stage Circuitry

The comparators in these devices contain a unique
output stage capable of rail-to-rail operation with loads
up to 8mA. Many comparators consume orders-of-mag­nitude more current during switching than during
steady-state operation. However, with this family of com­parators, the supply current change during an output
transition is extremely small. The Typical Operating
Characteristics graph Supply Current vs. Switching
Frequency shows the minimal supply current increase
as the output switching frequency approaches 1MHz.
This characteristic reduces the need for power-supply
filter capacitors to reduce glitches created by compara­tor switching currents. Another advantage realized in
high-speed, battery-powered applications is a substan­tial increase in battery life.

Applications Information

Additional Hysteresis

These comparators have ±3mV internal hysteresis.
Additional hysteresis can be generated with two resis­tors using positive feedback (Figure 1). Use the follow­ing procedure to calculate resistor values:

1) Calculate the trip points of the comparator using
these formulas:

and

V

TH

is the threshold voltage at which the comparator
switches its output from high to low as VINrises
above the trip point. VTLis the threshold voltage at
which the comparator switches its output from low to
high as VINdrops below the trip point.

2) The hysteresis band will be:

V

HYS

= VTH- VTL= V

CC

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,

SOT23 Comparator + Precision Reference ICs

_______________________________________________________________________________________ 9

Figure 1. Additional Hysteresis

V

R1

CC



2







VV

=+

TH REF



VVR

−

CC REF

()




12

RR




+

V

V

R2

REF

IN

IN+

IN-

V

CC

MAX9040–9043
MAX9050–9053

V

EE

OUT



VV

=−

TL REF

1




2

R

12

RR

+








R

2



RR

12+








MAX9040–MAX9043/MAX9050–MAX9053

3) In this example, let VCC= +5V and V

REF

= +2.5V.

and

4) Select R2. In this example, we will choose 1kΩ.

5) Select V

HYS

. In this example, we will choose 50mV.

6) Solve for R1.

where R1 ≈ 100kΩ, V

TH

= 2.525V, and VTL= 2.475V.

Board Layout and Bypassing

Power-supply bypass capacitors are not typically need­ed, but would be called for in cases where supply
impedance is high, supply leads are long, or excessive
noise is expected on the supply lines. Use 100nF
bypass capacitors under these conditions. Minimize
signal trace lengths to reduce stray capacitance.

Reference Output/Load Capacitance

The MAX904_/MAX905_ do not require an output
capacitor on REF for frequency stability. They are sta­ble for capacitive loads up to 4.7nF. However, in appli­cations where the load or the supply can experience
step changes, an output capacitor will reduce the
amount of overshoot (or undershoot) and assist the cir­cuit’s transient response. When an application is not
subject to transient conditions, the REF capacitor can
be omitted.

Biasing for Data Recovery

Digital data is often embedded into a bandwidth- and
amplitude-limited analog path. Recovering the data can
be difficult. Figure 2 compares the input signal to a
time-averaged version of itself. This self- biases the
threshold to the average input voltage for optimal noise
margin.

Even severe phase distortion is eliminated from the dig­ital output signal. Be sure to choose R1 and C1 so that

where f

CAR

is the fundamental carrier frequency of the

digital data stream.

Chip Information

MAX9040/41/50/51 TRANSISTOR COUNT: 204
MAX9042/43/52/53 TRANSISTOR COUNT: 280

Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs

10 ______________________________________________________________________________________

Figure 2. Time Averaging of the Input Signal for Data Recovery

V

CC

V

CC

V

IN

10k

0.1µF

IN+

IN-

V

EE

OUT

MAX9040–9043
MAX9050–9053

25 25

V

=+

TH



..



RR



2

R

12

+






V

TL






R

12

RR

+

25 1

.

=−



2




VV

HYS CC



=




2

R

12

RR

+






f

CAR

>>

2R1C1

1

π

0 050 5

. =




R

1 1000



1000

+






MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,

SOT23 Comparator + Precision Reference ICs

______________________________________________________________________________________ 11

Selector Guide

Typical Operating Circuit

REF/Uncommitted

REF/Uncommitted2.500

Uncommitted/Uncommitted

2

2.5002

MAX9052

2.048

MAX9053

Uncommitted/Uncommitted

2

2.0482

MAX9042

MAX9043

REF2.500

Uncommitted

1

2.5001

MAX9050

MAX9051

REF2.048

V

REF

(V)

COMPARATORS

PER PACKAGE

Uncommitted

1

2.0481

MAX9040

MAX9041

PART

Ordering Information (continued)

IN- CONNECTIONS

Pin Configurations (continued)

PART TEMP. RANGE

PIN-

PACKAGE

MAX9050AEUK-T

-40°C to +85°C 5 SOT23-5

MAX9050BEUK-T -40°C to +85°C 5 SOT23-5

MAX9051AEUT-T*

-40°C to +85°C 6 SOT23-6

MAX9051BEUT-T* -40°C to +85°C 6 SOT23-6

MAX9051AESA* -40°C to +85°C 8 SO

MAX9051BESA* -40°C to +85°C 8 SO

MAX9052AEUA

-40°C to +85°C 8 µMAX
MAX9052BEUA -40°C to +85°C 8 µMAX
MAX9052AESA -40°C to +85°C 8 SO
MAX9052BESA -40°C to +85°C 8 SO
MAX9053AEUB

-40°C to +85°C 10 µMAX

MAX9053BEUB -40°C to +85°C 10 µMAX

*Future product—contact factory for availability.

TOP

MARK

ADNW

ADNY

AAHG

AAHI

—

—

—
—
—
—
—

—

TOP VIEW

16V

OUT

V

MAX9041

2

EE

MAX9051

34

CC

5 REF

IN-IN+

REF

1

IN-

2

MAX9041
MAX9051

3

IN+

4

EE

87N.C.

6

OUT

5

N.C.V

V

CC

OUTA

INA+

V

OUTA

REF

INA-

1

2

MAX9043

3

MAX9053

4

5

EE

1

2

MAX9042
MAX9052

3

4

EE

87V

6

5

CC

OUTBREF

INB-

INB+V

10

CC

9

N.C.

8

OUTB

7

INB-INA+

6

INB+V

SOT23-6

SO

µMAX/SO

V

IN

µMAX

V

CC

V

IN+

IN-

REF

2.048V/2.500V

V

EE

CC

OUT

MAX9041/9043
MAX9051/9053

0.1µF

MAX9040–MAX9043/MAX9050–MAX9053

Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

Functional Diagrams

OUTA

OUT

V

CC

IN+ REF

MAX9040
MAX9050

OUT

REF

V

EE

REF

INA+

REF

V

EE

V

EE

OUTA

MAX9042
MAX9052

MAX9043
MAX9053

REF

REF

V

CC

IN+ IN-

MAX9041
MAX9051

REF

INA-

INA+

V

REF

EE

V

OUTB

INB-

INB+

V

OUTB

INB-

INB+

CC

CC