MAXIM MAX9117, MAX9120 Technical data

General Description

The MAX9117–MAX9120 nanopower comparators in
space-saving SC70 packages feature Beyond-the­Rails™ inputs and are guaranteed to operate down to
+1.6V. The MAX9117/MAX9118 feature an on-board

1.252V ±1.75% reference and draw an ultra-low supply
current of only 600nA, while the MAX9119/MAX9120
(without reference) require just 350nA of supply current.
These features make the MAX9117–MAX9120 family of
comparators ideal for all 2-cell battery-monitoring/man­agement applications.

The unique design of the output stage limits supply-cur­rent surges while switching, virtually eliminating the sup­ply glitches typical of many other comparators. This
design also minimizes overall power consumption under
dynamic conditions. The MAX9117/MAX9119 have a
push-pull output stage that sinks and sources current.
Large internal-output drivers allow rail-to-rail output
swing with loads up to 5mA. The MAX9118/MAX9120
have an open-drain output stage that makes them suit­able for mixed-voltage system design. All devices are
available in the ultra-small 5-pin SC70 package.

Applications

2-Cell Battery Monitoring/Management
Ultra-Low-Power Systems

Mobile Communications

Notebooks and PDAs

Threshold Detectors/Discriminators

Sensing at Ground or Supply Line

Telemetry and Remote Systems

Medical Instruments

Features

♦ Space-Saving SC70 Package (Half the Size of

SOT23)

♦ Ultra-Low Supply Current

350nA Per Comparator (MAX9119/MAX9120)
600nA Per Comparator with Reference

(MAX9117/MAX9118)

♦ Guaranteed to Operate Down to +1.6V

♦ Internal 1.252V ±1.75% Reference

(MAX9117/MAX9118)

♦ Input Voltage Range Extends 200mV

Beyond-the-Rails

♦ CMOS Push-Pull Output with ±5mA Drive

Capability (MAX9117/MAX9119)

♦ Open-Drain Output Versions Available

(MAX9118/MAX9120)

♦ Crowbar-Current-Free Switching

♦ Internal Hysteresis for Clean Switching

♦ No Phase Reversal for Overdriven Inputs

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

________________________________________________________________ Maxim Integrated Products 1

V

EE

IN- (REF)

IN+

1

5

V

CC

OUT

MAX9117
MAX9118
MAX9119
MAX9120

SC70

TOP VIEW

2

3

4

( ) ARE FOR MAX9117/MAX9118.

IN- (REF)

N.C.

V

EE

1

8

N.C.

N.C.

MAX9117
MAX9120

SO

2

IN+

3

V

CC

7

OUT

6

4

5

Typical Application Circuit appears at end of data sheet.

Pin Configurations

Selector Guide

Ordering Information

Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.

19-1862; Rev 4; 1/07

PART

INTERNAL

REFERENCE

OUTPUT

TYPE

SUPPLY

CURRENT

(nA)

MAX9117 Yes Push-Pull 600

MAX9118 Yes Open-Drain 600

350Push-PullNoMAX9119

MAX9120 No Open-Drain 350

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 specified for over -40°C to +85°C operating

temperature range.

+Denotes lead-free package.

PART

MAX9117EXK-T 5 SC70-5

MAX9117ESA+ 8 SO

MAX9118EXK-T 5 SC70-5

MAX9119EXK-T 5 SC70-5

MAX9120EXK-T 5 SC70-5

MAX9120ESA+ 8 SO

PIN­PACKAGE

TOP

MARK

ABW

—

ABX

ABY

ABZ

—

PKG

CODE

X5-1

S8-2

X5-1

X5-1

X5-1

S8-2

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX9117/MAX9118 (with REF)

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

IN+

= V

REF

, 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

Voltage Inputs (IN+, IN-, REF) .........(V

EE

- 0.3V) to (VCC+ 0.3V)

Output Voltage

MAX9117/MAX9119 ....................(V

EE

- 0.3V) to (VCC+ 0.3V)

MAX9118/MAX9120 ..................................(VEE- 0.3V) to +6V

Current Into Input Pins......................................................±20mA

Output Current..................................................................±50mA

Output Short-Circuit Duration .................................................10s

Continuous Power Dissipation (TA= +70°C)

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TA = +25°C 1.6 5.5

Supply Voltage Range V

CC

Inferred from the PSRR
test

T

A

= T

MIN

to T

MAX

1.8 5.5

V

VCC = 1.6V TA = +25°C

1

TA = +25°C

1.3

Supply Current I

CC

VCC = 5V

T

A

= T

MIN

to T

MAX

1.6

µA

IN+ Voltage Range V

IN+

Inferred from output swing test

V

EE

-

0.2

V

CC

+

0.2

V

TA = +25°C 1 5

Input Offset Voltage V

OS

(Note 2)

T

A

= T

MIN

to T

MAX

10

mV

Input-Referred Hysteresis V

HB

(Note 3) 4

mV

TA = +25°C

1

Input Bias Current I

B

TA = T

MIN

to T

MAX

2

nA

VCC = 1.6V to 5.5V, TA = +25°C 0.1 1

Power-Supply Rejection Ratio PSRR

V

CC

= 1.8V to 5.5V, TA = T

MIN

to T

MAX

1

mV/V

TA = +25°C

400

MAX9117, VCC = 5V,
I

SOURCE

= 5mA

T

A

= T

MIN

to T

MAX

500

200

Output Voltage Swing High

MAX9117,
I

SOURCE

= 1mA

V

CC

= 1.8V,

T

A

= T

MIN

to T

MAX

300

mV

TA = +25°C

400

VCC = 5V, I

SINK

= 5mA

T

A

= T

MIN

to T

MAX

500

200

Output Voltage Swing Low V

OL

I

SINK

= 1mA

V

CC

= 1.8V,

T

A

= T

MIN

to T

MAX

300

mV

Output Leakage Current I

LEAK

MAX9118 only, VO = 5.5V

1

µA

VCC = 5V 35

Sourcing, VO = V

EE

VCC = 1.6V 3

VCC = 5V 35

Output Short-Circuit Current I

SC

Sinking, VO = V

CC

VCC = 1.6V 3

mA

VCC = 1.6V 16

High-to-Low Propagation Delay
(Note 4)

t

PD-

V

CC

= 5V 14

µs

V

- V

CC

OH

VCC = 1.6V, TA = +25°C 100

VCC = 1.6V, TA = +25°C 100

0.60

0.68

0.15

190

190

0.002

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX9119/MAX9120 (without REF)

(VCC= +5V, VEE= 0V, VCM= 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

ELECTRICAL CHARACTERISTICS—MAX9117/MAX9118 (with REF) (continued)

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

IN+

= V

REF

, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCC = 1.6V 15

MAX9117 only

V

CC

= 5V 40

VCC = 1.6V, R

PULLUP

= 100kΩ

16

Low-to-High Propagation Delay
(Note 4)

t

PD+

MAX9118 only

V

CC

= 5V,

R

PULLUP

= 100kΩ

45

µs

Rise Time t

RISE

MAX9117 only, CL = 15pF 1.6 µs

Fall Time t

FALL

CL = 15pF 0.2 µs

Power-Up Time t

ON

1.2

ms

TA = +25°C

Reference Voltage V

REF

TA = T

MIN

to T

MAX

V

Reference Voltage Temperature
Coefficient

pp m/

°C

BW = 10Hz to 100kHz 1.1

Reference Output Voltage Noise E

N

BW = 10Hz to 100kHz, C

REF

= 1nF 0.2

mV

RMS

Reference Line Regulation

∆V

CC

VCC = 1.6V to 5.5V

mV/V

Reference Load Regulation

∆I

OUT

∆I

OUT

= 10nA ±1

mV/

nA

1.230 1.252 1.274

1.196 1.308

TC

REF

∆V

/

REF

∆V

/

REF

100

0.25

Supply Voltage Range V

Supply Current I

Input Common-Mode
Voltage Range

Input Offset Voltage V

Input-Referred Hysteresis V

Input Bias Current I

Input Offset Current I

Power-Supply Rejection Ratio PSRR

Common-Mode Rejection Ratio CMRR (VEE - 0.2V) ≤ VCM ≤ (VCC + 0.2V) 0.5 3 mV/V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

Inferred from the
PSRR test

TA = +25°C 1.6 5.5

T

= T

MIN

to T

MAX

A

1.8 5.5

VCC = 1.6V, TA = +25°C 0.35 0.80

CC

V

OS

VCC = 5V

Inferred from the CMRR test

CM

-0.2V ≤ VCM ≤

OS

CC

+ 0.2V)

(V
(Note 2)

-0.2V ≤ VCM ≤ (VCC + 0.2V) (Note 3) 4 mV

HB

TA = +25°C 0.15 1

B

TA = T

MIN

to T

MAX

VCC = 1.6V to 5.5V, TA = +25°C 0.1 1

VCC = 1.8V to 5.5V, TA = T

TA = +25°C 0.45 0.80

T

= T

MIN

to T

MAX

V

-

EE

A

0.2

TA = +25°C15

T

= T

MIN

to T

A

MAX

to T

MIN

MAX

V

µA

1.2

VCC +

0.2

V

mV

10

2

nA

75 pA

mV/V

1

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX9119/MAX9120 (without REF) (continued)

(VCC= +5V, VEE= 0V, VCM= 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Note 1: All specifications are 100% tested at T

A

= +25°C. Specification limits over temperature (TA= T

MIN

to T

MAX

) are guaranteed

by design, not production tested.

Note 2: V

OS

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

Note 3: The hysteresis-related trip points are defined as the edges of the hysteresis band, measured with respect to the center of

the band (i.e., V

OS

) (Figure 2).

Note 4: Specified with an input overdrive (V

OVERDRIVE

) of 100mV, and load capacitance of CL= 15pF. V

OVERDRIVE

is defined
above and beyond the offset voltage and hysteresis of the comparator input. For the MAX9117/MAX9118, reference voltage
error should also be added.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TA = +25°C

MAX9119 only, VCC =
5V, I

SOURCE

= 5mA

T

A

= T

MIN

to T

MAX

VCC = 1.6V,
T

A

= +25°C

Output Voltage Swing High

V

CC

-

V

OH

MAX9119 only,
I

SOURCE

= 1mA

V

CC

= 1.8V,

T

A

= T

MIN

to T

MAX

mV

TA = +25°C

VCC = 5V,
I

SINK

= 5mA

T

A

= T

MIN

to T

MAX

VCC = 1.6V,
T

A

= +25°C

Output Voltage Swing Low V

OL

I

SINK

= 1mA

V

CC

= 1.8V,

T

A

= T

MIN

to T

MAX

mV

Output Leakage Current I

LEAK

MAX9120 only, VO = 5.5V

1µA

VCC = 5V 35

Sourcing, V

O

= V

EE

VCC = 1.6V 3

VCC = 5V 35

Output Short-Circuit Current I

SC

Sourcing, V

O

= V

CC

VCC = 1.6V 3

mA

VCC = 1.6V 16

High-to-Low Propagation Delay
(Note 4)

t

PD-

VCC = 5V 14

µs

VCC = 1.6V 15

MAX9119 only

V

CC

= 5V 40

VCC = 1.6V,
R

PULLUP

= 100kΩ

16

Low-to-High Propagation Delay
(Note 4)

t

PD+

MAX9120 only

V

CC

= 5V,

R

PULLUP

= 100kΩ

45

µs

Rise Time t

RISE

MAX9119 only, CL = 15pF 1.6 µs

Fall Time t

FALL

CL = 15pF 0.2 µs

Power-Up Time t

ON

1.2 ms

190 400

100 200

190 400

100 200

0.001

500

300

500

300

500

600

550

650

700

750

800

900

850

950

1.5 2.52.0 3.0 3.5 4.0 4.5 5.0 5.5

MAX9117/MAX9118 SUPPLY CURRENT

vs. SUPPLY VOLTAGE AND TEMPERATURE

MAX9117-20 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

TA = +85°C

TA = +25°C

TA = -40°C

250

300

350

400

450

500

550

1.5 2.52.0 3.0 3.5 4.0 4.5 5.0 5.5

MAX9119/MAX9120 SUPPLY CURRENT

vs. SUPPLY VOLTAGE AND TEMPERATURE

MAX9117-20 toc02

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

TA = +85°C

TA = +25°C

TA = -40°C

550

650

600

750

700

850

800

900

-40 10-15 356085

MAX9117/MAX9118

SUPPLY CURRENT vs. TEMPERATURE

MAX9117-20 toc03

TEMPERATURE (°C)

SUPPLY CURRENT (nA)

VCC = +3V

VCC = +5V

VCC = +1.8V

250

350

300

450

400

500

550

-40 10-15 35 60 85

MAX9119/MAX9120

SUPPLY CURRENT vs. TEMPERATURE

MAX9117-20 toc04

TEMPERATURE (°C)

SUPPLY CURRENT (nA)

VCC = +3V

VCC = +5V

VCC = +1.8V

0

300

200

100

400

500

600

700

0231 456 910

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

MAX9117-20 toc07

SINK CURRENT (mA)

V

OL

(mV)

78

VCC = +1.8V

VCC = +5V

VCC = +3V

35

0

1 10 100 1k 10k 100k

MAX9117/MAX9118 SUPPLY CURRENT

vs. OUTPUT TRANSITION FREQUENCY

10

MAX9117-20 toc05

OUTPUT TRANSITION FREQUENCY (Hz)

SUPPLY CURRENT (

µ

A)

25

30

5

15

20

VCC = +1.8V

VCC = +5V

VCC = +3V

35

0

1 10 100 1k 10k 100k

MAX9119/MAX9120 SUPPLY CURRENT

vs. OUTPUT TRANSITION FREQUENCY

10

MAX9117-20 toc06

OUTPUT TRANSITION FREQUENCY (Hz)

SUPPLY CURRENT (µA)

25

30

5

15

20

VCC = +1.8V

VCC = +5V

VCC = +3V

0

100

200

300

400

500

600

0246810

OUTPUT VOLTAGE LOW vs. SINK CURRENT

AND TEMPERATURE

MAX9117-20 toc08

SINK CURRENT (mA)

V

OL

(mV)

31579

TA = +85°C

TA = +25°C

TA = -40°C

0

0.2

0.1

0.4

0.3

0.6

0.5

0.7

042681537910

MAX9117/MAX9119 OUTPUT VOLTAGE

HIGH vs. SOURCE CURRENT

MAX9117-20 toc09

SOURCE CURRENT (mA)

V

CC

- V

OH

(V)

VCC = +1.8V

VCC = +5V

VCC = +3V

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(VCC= +5V, V

EE

= 0V, CL= 15pF, V

OVERDRIVE

= 100mV, TA= +25°C, unless otherwise noted.)

Typical Operating Characteristics (continued)

(VCC= +5V, V

EE

= 0V, CL= 15pF, V

OVERDRIVE

= 100mV, TA= +25°C, unless otherwise noted.)

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

6 _______________________________________________________________________________________

0

0.2

0.1

0.4

0.3

0.6

0.5

042681537910

MAX9117/MAX9119 OUTPUT VOLTAGE

HIGH vs. SOURCE CURRENT AND TEMPERATURE

MAX9117-20 toc10

SOURCE CURRENT (mA)

V

CC

- V

OH

(V)

TA = +85°C

TA = +25°C

TA = -40°C

0

5

10

15

20

25

30

35

40

-40 -15 10 35 60 85

SHORT-CIRCUIT SINK CURRENT

vs. TEMPERATURE

MAX9117-20 toc11

TEMPERATURE (°C)

SINK CURRENT (mA)

VCC = +1.8V

VCC = +5V

VCC = +3V

0

5

10

15

20

25

30

35

40

-40 -15 10 35 60 85

MAX9117/MAX9119 SHORT-CIRCUIT SOURCE

CURRENT vs. TEMPERATURE

MAX9117-20 toc12

TEMPERATURE (°C)

SOURCE CURRENT (mA)

VCC = +1.8V

VCC = +3V

VCC = +5V

45

50

0.2

0.5

0.4

0.3

0.6

0.7

0.8

0.9

1.0

1.1

1.2

-40 10-15 356085

MAX9117-20 toc13

TEMPERATURE (°C)

V

OS

(mV)

VCC = +3V

VCC = +5V

VCC = +1.8V

OFFSET VOLTAGE vs. TEMPERATURE

3.0

4.0

3.5

5.5

5.0

4.5

6.0

-40 10-15 35 60 85

HYSTERESIS VOLTAGE vs. TEMPERATURE

MAX9117-20 toc14

TEMPERATURE (°C)

V

HB

(mV)

1.240

1.244

1.242

1.248

1.246

1.250

1.252

1.254

1.256

1.258

1.260

-40 10-15 356085

MAX9117/MAX9118

REFERENCE VOLTAGE vs. TEMPERATURE

MAX9117-20 toc15

TEMPERATURE (°C)

REFERENCE VOLTAGE (V)

VCC = +3V

VCC = +5V

VCC = +1.8V

1.249

1.250

1.251

1.252

1.253

1.254

1.5 2.5 3.5 4.52.0 3.0 4.0 5.0 5.5

MAX9117/MAX9118

REFERENCE VOLTAGE vs. SUPPLY VOLTAGE

MAX9117-20 toc16

SUPPLY VOLTAGE (V)

REFERENCE VOLTAGE (V)

1.240

1.242

1.244

1.246

1.248

1.250

1.252

1.254

1.256

1.258

1.260

045231 678910

MAX9117/MAX9118

REFERENCE OUTPUT VOLTAGE

vs. REFERENCE SOURCE CURRENT

MAX9117-20 toc17

SOURCE CURRENT (nA)

REFERENCE VOLTAGE (V)

VCC = +5V

VCC = +1.8V, +3V

1.240

1.242

1.244

1.246

1.248

1.250

1.252

1.254

1.256

1.258

1.260

045231 678910

MAX9117/MAX9118

REFERENCE OUTPUT VOLTAGE

vs. REFERENCE SINK CURRENT

MAX9117-20 toc18

SINK CURRENT (nA)

REFERENCE VOLTAGE (V)

VCC = +3V

VCC = +5V

VCC = +1.8V

Typical Operating Characteristics (continued)

(VCC= +5V, V

EE

= 0V, CL= 15pF, V

OVERDRIVE

= 100mV, TA= +25°C, unless otherwise noted.)

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

_______________________________________________________________________________________ 7

10

30

20

50

40

70

60

80

02010 30 40 50

MAX9117-20 toc23

INPUT OVERDRIVE (mV)

t

PD-

(µs)

PROPAGATION DELAY (t

PD-

)

vs. INPUT OVERDRIVE

VCC = +3V

VCC = +5V

VCC = +1.8V

0

5

10

15

20

25

30

35

40

0 1020304050

MAX9117-20 toc24

INPUT OVERDRIVE (mV)

t

PD+

(µs)

VCC = +5V

VCC = +3V

VCC = +1.8V

MAX9117/MAX9119

PROPAGATION DELAY (t

PD+

)

vs. INPUT OVERDRIVE

10 100 1000 10,000

MAX9118/MAX9120

PROPAGATION DELAY (t

PD-

)

vs. PULLUP RESISTANCE

MAX9117-20 toc25

R

PULLUP

(kΩ)

t

PD-

(µs)

15

9

10

11

12

13

14

VCC = +5V

VCC = +1.8V

VCC = +3V

10 100 1000 10,000

MAX9118/MAX9120

PROPAGATION DELAY (t

PD+

)

vs. PULLUP RESISTANCE

MAX9117-20 toc26

R

PULLUP

(kΩ)

t

PD+

(µs)

100

0

20

40

60

80

VCC = +5V

VCC = +1.8V

VCC = +3V

IN+
(50mV/div)

OUT
(2V/div)

PROPAGATION DELAY (t

PD-

)

(V

CC

= +5V)

20µs/div

MAX9117-20 toc27

OV

OV

8

14

12

10

16

18

20

22

24

26

28

MAX9117-20 toc19

TEMPERATURE (°C)

t

PD-

(µs)

PROPAGATION DELAY (t

PD-

)

vs. TEMPERATURE

-40 10-15 356085

VCC = +1.8V

VCC = +3V

VCC = +5V

0

20

10

40

30

50

60

MAX9117-20 toc20

t

PD+

(µs)

MAX9117/MAX9119

PROPAGATION DELAY (t

PD+

)

vs. TEMPERATURE

-40 10-15 35 60 85

TEMPERATURE (°C)

VCC = +5V

VCC = +1.8V

VCC = +3V

200

0

0.01 0.1 1 10 100 1000

40

MAX9117-20 toc21

CAPACITIVE LOAD (nF)

t

PD-

(µs)

80

120

160

20

60

100

140

180

PROPAGATION DELAY (t

PD-

)

vs. CAPACITIVE LOAD

VCC = +5V

VCC = +1.8V

VCC = +3V

0.01 0.1 1 10 100 1000

MAX9117-20 toc22

CAPACITIVE LOAD (nF)

t

PD+

(µs)

MAX9117/MAX9119

PROPAGATION DELAY (t

PD+

)

vs. CAPACITIVE LOAD

0

40

20

100

80

60

140

160

120

180

VCC = +5V

VCC = +1.8V

VCC = +3V

Typical Operating Characteristics (continued)

(VCC= +5V, V

EE

= 0V, CL= 15pF, V

OVERDRIVE

= 100mV, TA= +25°C, unless otherwise noted.)

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

8 _______________________________________________________________________________________

IN+
(50mV/div)

OUT
(1V/div)

MAX9117/MAX9119

PROPAGATION DELAY (t

PD+

)

(V

CC

= +1.8V)

20µs/div

MAX9117-20 toc32

OV

OV

IN+
(50mV/div)

OUT
(1V/div)

MAX9117/MAX9119

10kHz RESPONSE (V

CC

= +1.8V)

20µs/div

MAX9117-20 toc33

OV

OV

IN+
(50mV/div)

OUT
(2V/div)

MAX9117/MAX9119

1kHz RESPONSE (V

CC

= +5V)

200µs/div

MAX9117-20 toc34

OV

OV

V

CC

(2V/div)

OUT
(2V/div)

POWER-UP/DOWN RESPONSE

40µs/div

MAX9117-20 toc35

OV

OV

IN+
(50mV/div)

OUT
(2V/div)

PROPAGATION DELAY (t

PD-

)

(V

CC

= +3V)

20µs/div

MAX9117-20 toc29

OV

OV

IN+
(50mV/div)

OUT
(2V/div)

MAX9117/MAX9119

PROPAGATION DELAY (t

PD+

)

(V

CC

= +3V)

20µs/div

MAX9117-20 toc30

OV

OV

IN+
(50mV/div)

OUT
(1V/div)

PROPAGATION DELAY (t

PD-

)

(V

CC

= +1.8V)

20µs/div

MAX9117-20 toc31

OV

OV

IN+
(50mV/div)

OUT
(2V/div)

MAX9117/MAX9119

PROPAGATION DELAY (t

PD+

)

(V

CC

= +5V)

20µs/div

MAX9117-20 toc28

OV

OV

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

_______________________________________________________________________________________ 9

Functional Diagrams

MAX9117
MAX9118

IN+

OUT

V

CC

V

EE

REF

REF

1.252V

MAX9119
MAX9120

IN+

OUT

V

CC

V

EE

IN-

Detailed Description

The MAX9117/MAX9118 feature an on-board 1.252V
±1.75% reference, yet draw an ultra-low supply current
of 600nA. The MAX9119/MAX9120 (without reference)
consume just 350nA of supply current. All four devices
are guaranteed to operate down to +1.6V. Their com­mon-mode input voltage range extends 200mV
beyond-the-rails. Internal hysteresis ensures clean out­put switching, even with slow-moving input signals.
Large internal output drivers allow rail-to-rail output
swing with up to ±5mA loads.

The output stage employs a unique design that mini­mizes supply-current surges while switching, virtually

eliminating the supply glitches typical of many other
comparators. The MAX9117/MAX9119 have a push-pull
output stage that sinks as well as sources current. The
MAX9118/MAX9120 have an open-drain output stage
that can be pulled beyond V

CC

to an absolute maxi­mum of 6V above VEE. These open-drain versions are
ideal for implementing wire-OR output logic functions.

Input Stage Circuitry

The input common-mode voltage range extends from
V

EE

- 0.2V to VCC+ 0.2V. These comparators operate
at any differential input voltage within these limits. Input
bias current is typically ±0.15nA if the input voltage is
between the supply rails. Comparator inputs are pro­tected from overvoltage by internal ESD protection
diodes connected to the supply rails. As the input volt­age exceeds the supply rails, these ESD protection
diodes become forward biased and begin to conduct.

Output Stage Circuitry

The MAX9117–MAX9120 contain a unique break­before-make output stage capable of rail-to-rail opera­tion with up to ±5mA loads. 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.
In the Typical Operating Characteristics, the Supply
Current vs. Output Transition Frequency graphs show
the minimal supply-current increase as the output
switching frequency approaches 1kHz. This character­istic reduces the need for power-supply filter capaci­tors to reduce glitches created by comparator
switching currents. In battery-powered applications,
this characteristic results in a substantial increase in
battery life.

PIN

M A X9117/

M A X9118

M A X91 19/

SC70

FUNCTION

1

6

1

6

OUT Comparator Output

2424V

EE

Negative Supply

3 3 3 3 IN+

Comparator
Noninverting Input

42

REF

1.252V Reference

5757V

CC

Positive Supply

——

4 2 IN-

Comparator Inverting
Input

—

8

N.C.

No Connection.
Not internally
connected.

Pin Description

M A X91 20

SO SC 70 SO

—

1, 5,

—

NAME

1, 5,

8

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

10 ______________________________________________________________________________________

Reference (MAX9117/MAX9118)

The internal reference in the MAX9117/MAX9118 has an
output voltage of +1.252V with respect to VEE. Its typical
temperature coefficient is 100ppm/°C over the full

-40°C to +85°C temperature range. The reference is a
PNP emitter-follower driven by a 120nA current source
(Figure 1). The output impedance of the voltage refer­ence is typically 200kΩ, preventing the reference from
driving large loads. The reference can be bypassed with
a low-leakage capacitor. The reference is stable for any
capacitive load. For applications requiring a lower output
impedance, buffer the reference with a low-input-leak­age op amp, such as the MAX4162.

Applications Information

Low-Voltage, Low-Power Operation

The MAX9117–MAX9120 are ideally suited for use with
most battery-powered systems. Table 1 lists a variety of
battery types, capacities, and approximate operating
times for the MAX9117–MAX9120, assuming nominal
conditions.

Internal Hysteresis

Many comparators oscillate in the linear region of oper­ation because of noise or undesired parasitic feed­back. This tends to occur when the voltage on one
input is equal or very close to the voltage on the other
input. The MAX9117–MAX9120 have internal hysteresis
to counter parasitic effects and noise.

The hysteresis in a comparator creates two trip points:
one for the rising input voltage (V

THR

) and one for the

falling input voltage (V

THF

) (Figure 2). The difference

between the trip points is the hysteresis (V

HB

). When
the comparator’s input voltages are equal, the hystere­sis effectively causes one comparator input to move
quickly past the other, thus taking the input out of the

region where oscillation occurs. Figure 2 illustrates the
case in which IN- has a fixed voltage applied, and IN+
is varied. If the inputs were reversed, the figure would
be the same, except with an inverted output.

Additional Hysteresis (MAX9117/MAX9119)

The MAX9117/MAX9119 have a 4mV internal hysteresis
band (VHB). Additional hysteresis can be generated
with three resistors using positive feedback (Figure 3).
Unfortunately, this method also slows hysteresis re­sponse time. Use the following procedure to calculate
resistor values.

1) Select R3. Leakage current at IN is under 2nA, so the
current through R3 should be at least 0.2µA to mini­mize errors caused by leakage current. The current
through R3 at the trip point is (V

REF

- V

OUT

) / R3.
Considering the two possible output states in solving
for R3 yields two formulas: R3 = V

REF

/ IR3or R3 =

(VCC- V

REF

) / IR3. Use the smaller of the two result-

ing resistor values. For example, when using the

120nA

REF

V

CC

V

EE

V

BIAS

Figure 1. MAX9117/MAX9118 Voltage Reference Output
Equivalent Circuit

Table 1. Battery Applications Using MAX9117–MAX9120

BATTERY

TYPE

RECHARGEABLE

V

FRESH

(V)

V

END-OF-LIFE

(V)

CAPACITY,

AA SIZE

(mA-h)

MAX9117/MAX9118

OPERATING TIME

(hr)

Alkaline

(2 Cells)

No 3.0 1.8 2000

2.5 x 10

6

Nickel-Cadmium

(2 Cells)

Yes 2.4 1.8 750 937,500

1.25 x 10

6

10002.73.5Yes

Lithium-Ion

(1 Cell)

Nickel-Metal-

Hydride

(2 Cells)

Yes 2.4 1.8 1000

1.25 x 10

6

MAX9119/MAX9120

OPERATING TIME

(hr)

5 x 10

6

1.875 x 10

6

2.5 x 10

6

2.5 x 10

6

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

______________________________________________________________________________________ 11

THRESHOLDS

OUT

IN+

IN-

V

HB

HYSTERESIS

BAND

V

THF

V

THR

Figure 2. Threshold Hysteresis Band

V

CC

MAX9117
MAX9119

OUT

R3

R1

R2

V

REF

V

EE

V

IN

V

CC

Figure 3. MAX9117/MAX9119 Additional Hysteresis

MAX9117 (V

REF

= 1.252V) and VCC= +5V, and if

we choose IR3= 1µA, then the two resistor values
are 1.2MΩ and 3.8MΩ. Choose a 1.2MΩ standard
value for R3.

2) Choose the hysteresis band required (VHB). For this
example, choose 50mV.

3) Calculate R1 according to the following equation:

R1 = R3 (VHB/ VCC)

For this example, insert the values:

R1 = 1.2MΩ (50mV / 5V) = 12kΩ

4) Choose the trip point for V

IN

rising (V

THR

) such that

V

THR

> V

REF

✕

(R1 + R3) / R3, (V

THR

is the trip point
for VINrising). This is the threshold voltage at which
the comparator switches its output from low to high
as VINrises above the trip point. For this example,
choose 3V.

5) Calculate R2 as follows:

R2 = 1 / [V

THR

/ (V

REF

✕

R1) - (1 / R1) - (1 / R3)]

R2 = 1 / [3.0V / (1.252V ✕12kΩ) - (1 / 12kΩ) -

(1 / 1.2MΩ)] = 8.655kΩ

For this example, choose an 8.66kΩ standard 1% value.

6) Verify the trip voltages and hysteresis as follows:

V

IN

rising: V

THR

= V

REF

✕

R1 [(1 / R1) + (1 / R2)

+ (1 / R3)] = 3V

VINfalling: V

THF

= V

THR

- (R1 ✕VCC/ R3) = 2.95V

Hysteresis = V

THR

- V

THF

= 50mV

Additional Hysteresis (MAX9118/MAX9120)

The MAX9118/MAX9120 have a 4mV internal hysteresis
band. They have open-drain outputs and require an
external pullup resistor (Figure 4). Additional hysteresis
can be generated using positive feedback, but the for­mulas differ slightly from those of the MAX9117/
MAX9119. Use the following procedure to calculate
resistor values.

1) Select R3 according to the formulas R3 = V

REF

/ 1µA

or R3 = (VCC- V

REF

) / 1µA - R4. Use the smaller of

the two resulting resistor values.

2) Choose the hysteresis band required (VHB).

3) Calculate R1 according to the following equation:

R1 = (R3 + R4) (V

HB

/ VCC)

4) Choose the trip point for VINrising (V

THR

) (V

THR

is
the trip point for VINrising). This is the threshold volt­age at which the comparator switches its output
from low to high as VINrises above the trip point.

5) Calculate R2 as follows:

6) Verify the trip voltages and hysteresis as follows:

Hysteresis = V

THR

- V

THF

V falling

VVR

RR RRRRR

V

IN

THF REF CC

:

=× ++

+

⎛
⎝

⎜

⎞
⎠

⎟

+

×

−1

111

2134134

Vri g V V R

RR R

IN THR REF

sin : =× ++

⎛
⎝

⎜

⎞
⎠

⎟

1

11121

3

R

V

VRRR

THR

REF

21

11113

=

×

⎛
⎝

⎜

⎞
⎠

⎟

⎡

⎣

⎢
⎢

⎤

⎦

⎥
⎥

−− /

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

12 ______________________________________________________________________________________

Board Layout and Bypassing

Power-supply bypass capacitors are not typically
needed, but use 100nF bypass capacitors close to the
device’s supply pins when supply impedance is high,
supply leads are long, or excessive noise is expected
on the supply lines. Minimize signal trace lengths to
reduce stray capacitance. A ground plane and sur­face-mount components are recommended. If the REF
pin is decoupled, use a new low-leakage capacitor.

Zero-Crossing Detector

Figure 5 shows a zero-crossing detector application.
The MAX9119’s inverting input is connected to ground,
and its noninverting input is connected to a 100mV

P-P

signal source. As the signal at the noninverting input
crosses 0V, the comparator’s output changes state.

Logic-Level Translator

The Typical Application Circuit shows an application
that converts 5V logic to 3V logic levels. The MAX9120
is powered by the +5V supply voltage, and the pullup
resistor for the MAX9120’s open-drain output is con­nected to the +3V supply voltage. This configuration
allows the full 5V logic swing without creating overvolt­age on the 3V logic inputs. For 3V to 5V logic-level
translations, simply connect the +3V supply voltage to
VCCand the +5V supply voltage to the pullup resistor.

Chip Information

TRANSISTOR COUNT: 98

MAX9120

IN-

2MΩ

2MΩ

R

PULLUP

3V (5V)
LOGIC OUT

OUT

V

CC

+5V (+3V)

+3V (+5V)

V

EE

5V (3V) LOGIC IN

IN+

LOGIC-LEVEL
TRANSLATOR

Typical Application Circuit

V

EE

V

CC

OUT

R3

R2

R1

R4

V

REF

V

IN

V

CC

MAX9118
MAX9120

Figure 4. MAX9118/MAX9120 Additional Hysteresis

MAX9119

IN+

OUT

V

CC

100mV

P-P

V

CC

V

EE

IN-

Figure 5. Zero-Crossing Detector

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

______________________________________________________________________________________ 13

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

SC70, 5L.EPS

PACKAGE OUTLINE, 5L SC70

21-0076

1

E

1

MAX9117–MAX9120

SC70, 1.6V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference

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.

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

© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

SOICN .EPS

PACKAGE OUTLINE, .150" SOIC

1

1

21-0041

B

REV.DOCUMENT CONTROL NO.APPROVAL

PROPRIETARY INFORMATION

TITLE:

TOP VIEW

FRONT VIEW

MAX

0.010

0.069

0.019

0.157

0.010

INCHES

0.150

0.007

E

C

DIM

0.014

0.004

B

A1

MIN

0.053A

0.19

3.80 4.00

0.25

MILLIMETERS

0.10

0.35

1.35

MIN

0.49

0.25

MAX

1.75

0.050

0.016L

0.40 1.27

0.3940.386D

D

MINDIM

D

INCHES

MAX

9.80 10.00

MILLIMETERS

MIN

MAX

16

AC

0.337 0.344 AB8.758.55 14

0.189 0.197 AA5.004.80 8

N MS012

N

SIDE VIEW

H 0.2440.228 5.80 6.20

e 0.050 BSC 1.27 BSC

C

HE

e

B

A1

A

D

0∞-8∞

L

1

VARIATIONS:

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

Revision History

Pages changed at Rev 4: 1, 2, 9, 13