Maxim MAX4492AUD, MAX4492ASD, MAX4490AXK-T, MAX4490AUK-T Datasheet

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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
unity-gain 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 1; 1/00

PART

MAX4490AXK-T

MAX4490AUK-T
MAX4491AKA-T

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

TEMP. RANGE

PIN-

PACKAGE

5 SC70-5
5 SOT23-5
8 SOT23-8

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.

V

SS

OUTIN-

15V

DD

IN+

MAX4490

SOT23-5/SC70-5

2

34

- +

6000

5000

4000

3000

2000

CAPACITIVE LOAD (pF)

1000

0

TOP VIEW

UNSTABLE

STABLE

100 100k10k1k

RESISTIVE LOAD (Ω)

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

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 4Vp-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

deg60Phase 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

500

600

550

700

650

800

750

850

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

SUPPLY CURRENT PER AMPLIFIER

vs. TEMPERATURE

MAX4490 toc 01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VDD = +5.0V

VDD = +2.7V

0

300
200
100

500
400

900
800
700
600

1000

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

SUPPLY CURRENT PER AMPLIFIER

vs. SUPPLY VOLTAGE

MAX4490 toc02

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

-2.0

-1.4

-1.6

-1.8

-1.0

-1.2

-0.2

-0.4

-0.6

-0.8

0

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

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

MAX4490 toc03

TEMPERATURE (°C)

OFFSET VOLTAGE (mV)

0

20
10

30

60

70

50
40

80

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

OUTPUT SWING HIGH

vs. TEMPERATURE

MAX4490 toc04

TEMPERATURE (°C)

V

DD

- V

OUT

(mV)

VDD = +5.0V
R

L

= 2kΩ

VDD = +2.7V
R

L

= 2kΩ

VDD = +5.0V OR +2.7V
R

L

= 100kΩ

0

20
10

30

60

70

50
40

80

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

OUTPUT SWING LOW

vs. TEMPERATURE

MAX4490 toc05

TEMPERATURE (°C)

V

OUT

- V

SS

(mV)

VDD = +5.0V
R

L

= 2kΩ

VDD = +2.7V
R

L

= 2kΩ

VDD = +5.0V OR +2.7V
R

L

= 100kΩ

-20

0

-10

10

40

50

30
20

60

100 1k

10k

100k 1M 10M

OP AMP GAIN AND PHASE

vs. FREQUENCY

FREQUENCY (Hz)

GAIN (dB)

-180

-90

-135

-45

90

135

45

0

180

PHASE (DEGREES)

MAX4490 toc06

GAIN

PHASE

AV = +1000
C

L

= 10pF

-20

0

-10

10

40

50

30
20

60

100 1k 10k 100k 1M 10M

GAIN AND PHASE

vs. FREQUENCY (WITH C

LOAD

)

MAX4490 toc07

FREQUENCY (Hz)

GAIN (dB)

AV = +1000
C

LOAD

= 200pF

-180

-90

-135

-45

90

135

45
0

180

PHASE (DEGREES)

GAIN

PHASE

80

90

100

110

120

130

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

LARGE-SIGNAL GAIN

vs. TEMPERATURE

MAX4490 toc08

TEMPERATURE (°C)

LARGE-SIGNAL GAIN (dB)

VDD = 5.0V

-100

-70

-60

-90

-80

-30

-40

-50

-10

-20

0

10 1k 10k100 100k 1M 10M

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX4490 toc09

FREQUENCY (Hz)

PSSR (dB)

AV = +1

Typical Operating Characteristics

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