Rainbow Electronics MAX9034 User Manual

General Description

The MAX9030/MAX9031/MAX9032/MAX9034 single/
dual/quad comparators are optimized for single-supply
applications from +2.5V to +5.5V but can also be oper­ated from dual supplies. These comparators have a
188ns propagation delay and consume 35µA of supply
current per comparator over the -40°C to +125°C oper­ating temperature range. The combination of low­power, single-supply operation down to +2.5V, and
ultra-small footprint makes these devices ideal for
portable applications.

The MAX9030 is a low-cost single comparator with
shutdown. The MAX9031, MAX9032, and MAX9034 are
low-cost single, dual, and quad comparators without
shutdown, respectively. The comparators’ 4mV of built­in hysteresis provides noise immunity and prevents
oscillations even with a slow-moving input signal. The
input common-mode range extends from the negative
supply to within 1.1V of the positive supply. The design
of the comparator output stage substantially reduces
switching current during output transitions, virtually
eliminating power-supply glitches.

The MAX9030 single comparator with shutdown is avail­able in the space-saving 6-pin SC70 and SOT23 pack­ages. The MAX9031 single comparator is available in tiny
5-pin SC70 and SOT23 packages. The MAX9032 dual
comparator is available in 8-pin SOT23 and µMAX pack­ages, and the MAX9034 quad comparator is available in
a 14-pin TSSOP package.

________________________Applications

Features

♦ Low-Cost Solution Available in Space-Saving

SC70 Packages (MAX9030/MAX9031)

♦ +2.5 to +5.5V Single-Supply Voltage Range

♦ Comparator Output Swings Rail-to-Rail

®

♦ Internal 4mV Comparator Hysteresis

♦ 188ns Propagation Delay

♦ Low 35µA Supply Current

♦ No Phase Reversal for Overdriven Inputs

♦ Space-Saving Packages

5-Pin SC70 (MAX9031)
6-Pin SC70 (MAX9030)
8-Pin SOT23 (MAX9032)
14-Pin TSSOP (MAX9034)

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad

Single-Supply Comparators

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

19-1767; Rev 0; 10/00

Ordering Information

*Future product–contact factory for availability.

Battery-Powered
Portable Systems

Mobile Communications
Sensor Signal Detection
Photodiode Preamps

Digital Line Receivers
Keyless Entry Systems
Threshold Detectors/

Discriminators

Typical Application Circuit appears at end of data sheet.

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

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 TEMP. RANGE PIN-PACKAGE

M A X9 0 3 0 AX T- T -40°C to +125°C 6 SC70

MAX9030AUT- T -40°C to +125°C 6 SOT23

MAX9031AXK- T -40°C to +125°C 5 SC70

MAX9031AUK- T -40°C to +125°C 5 SOT23

M A X 9 0 3 2 A KA - T -40°C to +125°C 8 SOT23

MAX9032AUA* -40°C to +125°C 8 µMAX

MAX9032ASA -40°C to +125°C 8 SO

M A X9 0 3 4 AUD -40°C to +125°C 14 TSSOP

MAX9034AS D -40°C to +125°C 14 SO

TOP VIEW

IN+

16V

V

MAX9030

2

SS

34

SC70-6/SOT23-6

DD

5

SHDN

OUTIN-

15V

IN+

V

MAX9031

2

SS

34

SC70-5/SOT23-5

DD

OUTIN-

OUTA

1

2

INA+

3

4

SS

SOT23-8/µMAX-8/

87V

MAX9032

6

5

SO-8

1

OUTA

DD

2

INA-

OUTBINA-

INB-

INB+V

3

INA+

4

V

DD

5

INB+

6

INB-

7

TSSOP-14/SO-14

MAX9034

OUTD

14

IND-

13

IND+

12

V

11

SS

10

INC+

9

INC-

8

OUTCOUTB

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +5V, VSS= 0, VCM= 0, V

SHDN

= +5V (Note 1), TA= -40°C to +125°C, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 2)

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 (VDDto VSS) ....................................-0.3V to +6V

Voltage Inputs (IN+, IN- to VSS). ................-0.3V to (VDD+ 0.3V)

Differential Input Voltage (IN+ to IN-) .................................+6.6V

Output Short-Circuit

Duration ...............................................2s to Either V

DD

or V

SS

Current into Any Pin ............................................................20mA

Continuous Power Dissipation (T

A

= +70°C) ...............................

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

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

6-Pin SC70 (derate 3.1mW/°C above +70°C)...............245mW

6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW

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

Automotive Application...................................-40°C to +125°C

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

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

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

Operating Voltage Range V

S upp l y C ur rent p er C om par ator I

Supply Current in Shutdown V

Shutdown Input Bias Current V

Shutdown Logic High (Note 1)

Shutdown Logic Low (Note 1)

Input Offset Voltage V

Input Offset Voltage
Temperature Coefficient

Hysteresis (Note 4) 4 mV

Input Bias Current I

Input Offset Current I

Common-Mode Voltage Range V

C om m on- M od e Rej ecti on Rati o CMRR V

Power-Supply Rejection Ratio PSRR V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Guaranteed by PSRR test

DD

DD

= 0 (Note 1) 0.05 1 µA

S HDN

= 0 to VDD (Note 1) 0.1 2.5 µA

S HDN

(Note 3) ±1 ±5mV

OS

TCV

OS

BIAS

OS

Guaranteed by CMRR test V

CM

≤ V

S S

DD

≤ ( V

C M

D D

= +2.5V to +5.5V 72 100 dB

- 1.1V ) , V

2.5

35 55 µA

0.7 × V

D D

±1 µV/°C

880nA

±2 ±60 nA

SS

= + 5.5V 72 100 d B

D D

5.5 V

0.3 × V

D D

VDD - 1.1 V

V

V

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad

Single-Supply Comparators

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V, VSS= 0, VCM= 0, V

SHDN

= +5V (Note 1), TA= -40°C to +125°C, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 2)

Note 1: MAX9030 only.
Note 2: All devices are production tested at +25°C. All temperature limits are guaranteed by design.
Note 3: Comparator Input Offset is defined as the center of the hysteresis zone.
Note 4: Hysteresis is defined as the difference of the trip points required to change comparator output states.
Note 5: V

OD

is the overdrive that is beyond the offset and hysteresis-determined trip points.

Note 6: Rise and fall times are measured between 10% and 90% at OUT.

Typical Operating Characteristics

(VDD= +5V, VSS= 0, VCM= 0, RL= 10kΩ, CL= 15pF, VOD= 100mV, TA= +25°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Voltage-Swing VOL, V

Output Short-Circuit Current I

Shutdown Mode Output
Leakage

Propagation Delay t

Rise/Fall-Time tR, t

Shutdown Delay Time ON/OFF (Note 1) 40 ns

Shutdown Delay Time OFF/ON (Note 1) 400 ns

Power-On Time RL = 10kΩ, CL = 15pF 200 ns

Maximum Capacitive Load C

P D +

SC

VOH = VDD - V
(V

OH

VOL = V
(V

V

- V

IN+

IN-

OUT

- V

IN-

IN+

≤ (0.3 × VDD), V

SHDN

OUT

) ≥ 20mV

- VSS,

) ≥ 20mV

I

,

I

I

I

OUT

(Note 1)

RL = 10kΩ,

, t

P D -

F

L

= 15pF (Note 5)

C

L

VDD = +5V, RL = 10kΩ, CL = 15pF (Note 6) 20 ns

No sustained oscillations 150 pF

VOD = 10mV 228

V

= 10µA 2

SOURCE

= 4mA 165 400

SOURCE

= 10µA 2

SINK

= 4mA 165 400

SINK

45 m A

= 0 to V

OD

DD

±0.01 ±3.5 µA

= 100mV 188

mV

ns

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

40

38

36

34

32

SUPPLY CURRENT (µA)

30

28

2.5 3.5 4.03.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)

MAX9030/1/2/4 toc01

SUPPLY CURRENT (µA)

38

37

36

35

34

33

32

-50 25 50-25 0 75 100 125

SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

1000

MAX9030/1/2/4 toc02

SUPPLY CURRENT (µA)

vs. OUTPUT TRANSITION FREQUENCY

100

10

100

10

OUTPUT TRANSITION FREQUENCY (Hz)

SUPPLY CURRENT

10k

1k

100k

MAX9030/1/2/4 toc03

1M

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD= +5V, VSS= 0, VCM= 0, RL= 10kΩ, CL= 15pF, V

OD

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

-0.5

-0.2

-0.3

-0.4

0

-0.1

0.4

0.3

0.2

0.1

0.5

-50 -25 0 25 50 75 100 125

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

MAX9030/1/2/4 toc04

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE (mV)

0

40

20

100

80

60

140

160

120

180

0 1.5 2.00.5 1.0 2.5 3.0 3.5 4.0 4.5

OUTPUT HIGH VOLTAGE

vs. SOURCE CURRENT

MAX9030/1/2/4 toc05

SOURCE CURRENT (mA)

V

DD

- V

OUT

OUTPUT HIGH VOLTAGE (mV)

0

40

20

100

80

60

140

160

120

180

0 1.5 2.00.5 1.0 2.5 3.0 3.5 4.0 4.5

OUTPUT LOW VOLTAGE

vs. SINK CURRENT

MAX9030/1/2/4 toc06

SINK CURRENT (mA)

OUTPUT LOW VOLTAGE (mV)

30

40

35

50

45

55

60

-50 25 50-25 0 75 100 125

OUTPUT SHORT-CIRCUIT (SINK) CURRENT

vs. TEMPERATURE

MAX9030/1/2/4 toc07

TEMPERATURE (°C)

SHORT-CIRCUIT SINK CURRENT (mA)

30

40

35

50

45

55

60

-50 25 50-25 0 75 100 125

OUTPUT SHORT-CIRCUIT (SOURCE) CURRENT

vs. TEMPERATURE

MAX9030/1/2/4 toc08

TEMPERATURE (°C)

SHORT-CIRCUIT SOURCE CURRENT (mA)

100

160

140

120

180

200

220

240

260

280

300

05025 75 100 125 150

PROPAGATION DELAY vs. CAPACITIVE LOAD

(V

DD

= 2.7V)

MAX9030/1/2/4 toc09

CAPACITIVE LOAD (pF)

PROPAGATION DELAY (ns)

100

160

140

120

180

200

220

240

260

280

300

05025 75 100 125 150

PROPAGATION DELAY vs. CAPACITIVE LOAD

(V

DD

= +5V)

MAX9030/1/2/4 toc10

CAPACITIVE LOAD (pF)

PROPAGATION DELAY (ns)

t

PD-

t

PD+

100

160

140

120

200

180

280

260

240

220

300

-50 -25 0 25 50 75 100 125

PROPAGATION DELAY vs. TEMPERATURE

MAX9030/1/2/4 toc11

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

t

PD-

t

PD+

50

125

100

75

175

150

275

250

225

200

300

0 20 40 60 80 100 120 140

PROPAGATION DELAY

vs. INPUT OVERDRIVE VOLTAGE

MAX9030/1/2/4 toc12

INPUT OVERDRIVE VOLTAGE (mV)

PROPAGATION DELAY (ns)

t

PD-

t

PD+

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad

Single-Supply Comparators

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VDD= +5V, VSS= 0, VCM= 0, RL= 10kΩ, CL= 15pF, VOD= 100mV, TA= +25°C, unless otherwise noted.)

PROPAGATION DELAY

IN+ - IN-

200mV/div

OUT

2V/div

TIME (200ns/div)

OUTPUT SWITCHING CURRENT, FALLING

IN+ - IN-

5V/div

OUT

5V/div

MAX9030/1/2/4 toc13

MAX9030/1/2/4 toc15

SWITCHING

100mV/div

OUTPUT SWITCHING CURRENT, RISING

IN+ - IN-

5V/div

OUT

5V/div

CURRENT
200µA/div

TIME (2µs/div)

SINUSOID 1MHz RESPONSE AT 1.25MHz

= 100mV

V

OD

IN+ - IN-

MAX9030/1/2/4 toc14

MAX9030/1/2/4 toc16

SWITCHING

CURRENT

50µA/div

IN+ - IN-

10mV/div

OUT

2V/div

OUT

2V/div

TIME (1µs/div)

TIME (100ns/div)

SINUSOID 1MHz RESPONSE AT 1.25MHz

= 10mV

V

OD

TIME (100ns/div)

MAX9030/1/2/4 toc17

V

2.5V/div

OUT

DD

POWER-UP DELAY

MAX9030/1/2/4 toc18

TIME (200ns/div)

MAX9030/MAX9031/MAX9032/MAX9034

Detailed Description

The MAX9030/MAX9031/MAX9032/MAX9034 are sin­gle/dual/quad low-cost comparators. They have an
operating supply voltage from +2.5V to +5.5V when
operating from a single supply and from ±1.25V to
±2.75V when operating from dual power supplies, and
consume only 35µA. Their common-mode input voltage
range extends from the negative supply to within 1.1V
of the positive supply. Internal hysteresis ensures clean
output switching, even with slow-moving input signals.

Shutdown Mode

The MAX9030 comparator comes with a power-saving
shutdown mode. When in shutdown, the supply current
drops from a typical 35µA to 0.05µA, and the outputs
become high impedance. SHDN has a high input imped­ance and typically draws 0.1µA when connected to V

SS

or VDD. A maximum logic low voltage of 0.3V ✕ V

DD

applied to SHDN places the device in the shutdown
mode. A minimum logic high voltage of 0.7V ✕ V

DD

applied to SHDN will enable normal operation. To dis­able shutdown, connect SHDN to VDD.

Applications Information

Adding Hysteresis

Hysteresis extends the comparator’s noise margin by
increasing the upper threshold and decreasing the
lower threshold. A voltage-divider from the output of the
comparator sets the trip voltage. Therefore, the trip volt­age is related to the output voltage.

These comparators have 4mV internal hysteresis.
Additional hysteresis can be generated with two resis­tors using positive feedback (Figure 1). Use the follow­ing procedure to calculate resistor values:

Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators

6 _______________________________________________________________________________________

Pin Description

PIN

NAME FUNCTION

M A X9 0 3 0 M A X9 0 3 1 M A X9 0 3 2 M A X9 0 3 4

11—— IN+ Comparator Noninverting Input

224 11VSSN eg ati ve S up p l y V ol tag e. Byp ass w i th a 0.1µF cap aci tor .

33—— IN- Comparator Inverting Input

44——OUT Comparator Output

5 —— —SHDN Shutdown

658 4 VDDP osi ti ve S up p l y V ol tag e. Byp ass w i th a 0.1µF cap aci tor .

—— 1 1 OUTA Comparator A Output

—— 2 2 INA- Comparator A Inverting Input

—— 3 3 INA+ Comparator A Noninverting Input

—— 5 5 INB+ Comparator B Noninverting Input

—— 6 6 INB- Comparator B Inverting Input

—— 7 7 OUTB Comparator B Output

——— 8 OUTC Comparator C Output

——— 9 INC- Comparator C Inverting Input

——— 10 INC+ Comparator C Noninverting Input

——— 12 IND+ Comparator D Noninverting Input

——— 13 IND- Comparator D Inverting Input

——— 14 OUTD Comparator D Output

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

VTH= V

REF

+[((VDD- V

REF

)R2) / (R1 + R2)

VTL= V

REF

(1 - (R2 / (R1 + R2))]

where VTHis the threshold voltage at which the com­parator switches its output from high to low as V

IN

rises above the trip point. VTLis the threshold volt­age at which the comparator switches its output from
low to high as V

IN

drops below the trip point.

2) The hysteresis band will be:

V

HYS

= VTH- VTL= VDD(R2 / (R1 + R2))

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

REF

= +2.5V.

VTH= 2.5V + 2.5(R2 / (R1 + R2))V

and

VTL= 2.5[1 - (R2 / (R1 + R2))]

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.

V

HYS

= VDD(R2 / (R1 + R2))

0.050V = 5(1000Ω/(R1 + 1000Ω)) V

where R1 ≈ 100kΩ, VTH= 2.525V, and VTL= 2.475V.

The above-described design procedure assumes rail­to-rail output swing. If the output is significantly loaded,
the results should be corrected.

Board Layout and Bypassing

Use 100nF bypass as a starting point. Minimize signal
trace lengths to reduce stray capacitance. Minimize the
capacitive coupling between IN- and OUT. For slow­moving input signals (rise-time > 1ms), use a 1nF
capacitor between IN+ and IN-.

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:

ƒ

CAR

>> 1 / (2πR1C1)

where ƒ

CAR

is the fundamental carrier frequency of the

digital data stream.

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad

Single-Supply Comparators

_______________________________________________________________________________________ 7

Figure 1. Additional Hysteresis

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

V

V

V

DD

DD

SS

MAX9031

OUT

V

DD

V

DD

V

IN

10kΩ

0.1µF

IN+

IN-

OUT

MAX9031

V

SS

R1

R2

V

REF

V

IN

IN+

IN-

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators

8 _______________________________________________________________________________________

Typical Application Circuit Chip Information

TRANSISTOR COUNT/MAX9030/MAX9031: 123
TRANSISTOR COUNT/MAX9032: 184
TRANSISTOR COUNT/MAX9034: 368

V

DD

V

IN

R1

IN+

V

IN

V

REF

IN-

R2

V

DD

MAX9031

0.1µF

OUT

RL

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad

Single-Supply Comparators

_______________________________________________________________________________________ 9

Package Information

SC70, 5L.EPS

SC70, 6L.EPS

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators

10 ______________________________________________________________________________________

Package Information (continued)

SOT23, 8L.EPS

MAX9030/MAX9031/MAX9032/MAX9034

Low-Cost, Ultra-Small, Single/Dual/Quad

Single-Supply Comparators

Package Information (continued)

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.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________11

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

TSSOP,NO PADS.EPS