MAXIM MAX4490, MAX4491, MAX4492 Technical data

General Description

The MAX4490/MAX4491/MAX4492 single/dual/quad,
low-cost CMOS op amps feature Rail-to-Rail®input and
output capability from either a single 2.7V to 5.5V sup­ply or dual ±1.35V to ±2.75V supplies. These amplifiers
exhibit a high slew rate of 10V/µs and a gain-bandwidth
product of 10MHz. They can drive 2kΩ resistive loads
to within 55mV of either supply rail and remain unity­gain stable with capacitive loads up to 300pF.

The MAX4490 is offered in the ultra-small, 5-pin SC70
package, which is 50% smaller than the standard 5-pin
SOT23 package. Specifications for all parts are guaran­teed over the automotive (-40°C to +125°C) tempera­ture range.

Applications

Battery-Powered Instruments

Portable Equipment

Audio Signal Conditioning

Low-Power/Low-Voltage Applications

Sensor Amplifiers

RF Power Amplifier Control

High-Side/Low-Side Current Sensors

Features

♦ 2.7V to 5.5V Single-Supply Operation

♦ 10V/µs Slew Rate

♦ Rail-to-Rail Input Common-Mode Voltage Range

♦ Rail-to-Rail Output Voltage Swing

♦ 10MHz Gain-Bandwidth Product

♦ Unity-Gain Stable with Capacitive Loads

Up to 300pF

♦ 50pA Input Bias Current

♦ Ultra-Small, 5-Pin SC70 Package (MAX4490)

MAX4490/MAX4491/MAX4492

Low-Cost, High-Slew-Rate,

Rail-to-Rail I/O Op Amps in SC70

________________________________________________________________ Maxim Integrated Products 1

19-1525; Rev 2; 4/01

PART

MAX4490AXK-T

MAX4490AUK-T

MAX4491AKA-T

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

TEMP RANGE

PIN­PACKAGE

5 SC70-5

5 SOT23-5

8 SOT23-5

Capacitive-Load Stability

Ordering Information

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

MAX4492AUD

-40°C to +125°C 14 TSSOP

MAX4492ASD -40°C to +125°C 14 SO

TOP

MARK

AAB

ADKQ

AADB

—
—

Pin Configurations/

Functional Diagrams

Pin Configurations continued at end of data sheet.

MAX4491AUA -40°C to +125°C 8 µMAX —

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.

6000

5000

4000

3000

2000

CAPACITIVE LOAD (pF)

1000

0

100 100k10k1k

UNSTABLE

STABLE

RESISTIVE LOAD (Ω)

TOP VIEW

MAX4490

15V

IN+

2

V

SS

- +

34

SOT23-5/SC70-5

DD

OUTIN-

MAX4490/MAX4491/MAX4492

Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

OUT

= VDD/2, RL= 100kΩ connected to VDD/2, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +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 (VDDto VSS)....................................................6V

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

SS

- 0.3V) to (VDD+ 0.3V)

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

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 5.26mW/°C above +70°C)........421 mW

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

14-Pin TSSOP (derate 8.3mW/°C above +70°C) ....... 667mW

14-Pin SO (derate 8.3mW/°C above +70°C).............. 667mW

Operating Temperature Range ........................ -40°C to +125°C

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

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

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

A

V(CL)

= 1, no sustained oscillations

ƒ = 10kHz

TA= +25°C

ƒ = 10kHz

Measured from 10% to 90% of 4V

P-P

step

(Note 2)

CL= 10pF

CL= 10pF

RL= 100kΩ

2.7V ≤ VDD≤ 5.5V

CL= 10pF

VSS≤ VCM≤ V

DD

Inferred from CMRR test

TA= T

MIN

to T

MAX

(Note 3)

(Note 3)

Sourcing or sinking

RL= 2kΩ

CONDITIONS

pF300Capacitive-Load Drive

fA√Hz

1i

n

Current-Noise Density

nV/√Hz

12e

n

Voltage-Noise Density

V/µs10SRSlew Rate

dB10Gain Margin

degrees60Phase Margin

pF5C

IN

Input Capacitance

MHz10GBWPGain-Bandwidth Product

mA±50I

OUT(SC)

Output Short-Circuit Current

65 85

mV

±1.5 ±10

V

OS

Input Offset Voltage

mA0.8 2I

S

V2.7 5.5V

DD

Supply Voltage Range

Supply Current (per amplifier)

dB

110

A

V

Large-Signal Voltage Gain

dB65 100PSRRPower-Supply Rejection Ratio

dB54 75CMRRCommon-Mode Rejection Ratio

VV

SS

V

DD

V

CM

Input Common-Mode Range

16

nA±0.05 ±2.5I

B

Input Bias Current

nA±0.05 ±2.5I

OS

Input Offset Current

MΩ

1000R

IN

Input Resistance

UNITSMIN TYP MAXSYMBOLPARAMETER

Note 1: All units production tested at TA= +25°C. Limits over temperature guaranteed by design.
Note 2: Guaranteed by the Power-Supply Rejection Ratio (PSRR) test.
Note 3: Input Offset Voltage, Input Bias Current, and Input Offset Current are all tested and guaranteed at both ends of the common-

mode range.

(V

SS

+ 0.25V) ≤ V

OUT

≤ (V

DD

- 0.25V)

RL= 100kΩ

RL= 2kΩ

55 200

mV

1.5

V

OH

Output-Voltage Swing High

Specified as
VDD- V

OH

RL= 100kΩ

RL= 2kΩ

35 150

mV

1.5

V

OL

Output-Voltage Swing Low

Specified as
VOL- V

SS

(Note 3)

MAX4490/MAX4491/MAX4492

Low-Cost, High-Slew-Rate,

Rail-to-Rail I/O Op Amps in SC70

_______________________________________________________________________________________ 3

5

MAX4490 toc02

Typical Operating Characteristics

(VDD= 5V, VSS= 0, VCM= VDD/2, RL= 100kΩ to VDD/2, TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT PER AMPLIFIER

vs. TEMPERATURE

850

800

750

700

650

SUPPLY CURRENT (µA)

600

550

500

VDD = 5V

VDD = 2.7V

-40 -10 5 20-25 35 50 65 80 95 110 125

TEMPERATURE (°C)

OUTPUT SWING HIGH

vs. TEMPERATURE

80

70

60

50

(mV)

OUT

40

- V

DD

30

V

20

10

0

-40 -10 5 20 35-25 50 65 80 95 110 125

VDD = 5V

= 2kΩ

R

L

VDD = 5V OR 2.7V

= 100kΩ

R

L

TEMPERATURE (°C)

VDD = 2.7V

= 2kΩ

R

L

GAIN AND PHASE

vs. FREQUENCY (WITH C

60

50

40

30

20

GAIN (dB)

10

0

AV = 1000

-10
C

LOAD

-20

100 1k 10k 100k 1M 10M

PHASE

= 200pF

FREQUENCY (Hz)

GAIN

LOAD

MAX4490 toc07

MAX4490 toc 01

MAX4490 toc04

)

180

135

90

45

0

-45
PHASE (DEGREES)

-90

-135

-180

SUPPLY CURRENT PER AMPLIFIER

vs. SUPPLY VOLTAGE

1000

900

800

700

600

500

400

300

SUPPLY CURRENT (µA)

200

100

0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.
SUPPLY VOLTAGE (V)

OUTPUT SWING LOW

vs. TEMPERATURE

80

70

60

50

(mV)

SS

40

- V

OUT

V

30

20

10

VDD = 5V OR 2.7V

= 100kΩ

R

L

0

-40 -10 5 20 35-25 50 65 80 95 110 125

VDD = 5V

= 2kΩ

R

L

TEMPERATURE (°C)

VDD = 2.7V
R

LARGE-SIGNAL GAIN

vs. TEMPERATURE

130

120

110

100

LARGE-SIGNAL GAIN (dB)

90

80

-40 -10 5-25 20 35 50 65 80 95 110 125

TEMPERATURE (°C)

= 2kΩ

L

VDD = 5V

-0.2

-0.4

-0.6

-0.8

-1.0

-1.2

OFFSET VOLTAGE (mV)

-1.4

-1.6

-1.8

-2.0

MAX4490 toc05

GAIN (dB)

MAX4490 toc08

PSSR (dB)

-100

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

0

-40 -25 -10 5 20 35 50 8065 95 125110

TEMPERATURE (°C)

OP AMP GAIN AND PHASE

vs. FREQUENCY

60

50

40

30

20

10

0

-10

-20

AV = 1000

= 10pF

C

L

100 1k

PHASE

10k

FREQUENCY (Hz)

GAIN

100k 1M 10M

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

0

AV = 1

-10

-20

-30

-40

-50

-60

-70

-80

-90

10 1k 10k100 100k 1M 10M

FREQUENCY (Hz)

MAX4490 toc06

MAX4490 toc03

180

135

90

45

0

-45
PHASE (DEGREES)

-90

-135

-180

MAX4490 toc09