Maxim MAX4294EUD, MAX4292EUA, MAX4292ESA, MAX4291EXK-T, MAX4291EUK-T Datasheet

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MAX4291/MAX4292/MAX4294

Ultra-Small, +1.8V, µPower,

Rail-to-Rail I/O Op Amps

________________________________________________________________ Maxim Integrated Products 1

V

EE

OUTIN-

15V

CC

IN+

SC70-5/SOT23-5

TOP VIEW

2

34

V

EE

OUTB

OUTA

INB-

INB+

V

CC

INA+

INA-

µMAX/SO

1

2

8

7

3

4

6

5

MAX4292

MAX4291

19-1612; Rev 0; 3/00

Pin Configurations

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

8 µMAX

5 SOT23-5

5 SC70-5

PIN-

PACKAGE

TEMP. RANGE

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

MAX4292EUA*

MAX4291EUK-T

MAX4291EXK-T

PART

Ordering Information

Selector Guide

—

ADML

AAD

TOP

MARK

14 TSSOP

14 SO

8 SO -40°C to +85°C

-40°C to +85°C

-40°C to +85°CMAX4294EUD*

MAX4294ESD*

MAX4292ESA*

—

—

—

Pin Configurations continued at end of data sheet.

14-pin SO/TSSOP

8-pin µMAX/SO

5-pin SC70/SOT23

PIN-PACKAGE

AMPLIFIERS

PER PACKAGE

1

2

4MAX4294

MAX4292

MAX4291

PART

General Description

The MAX4291/MAX4292/MAX4294 family of micropow­er operational amplifiers operates from a +1.8V to
+5.5V single supply or ±0.9V to ±2.75V dual supplies
and has Rail-to-Rail®input/output capabilities. These
amplifiers provide a 500kHz gain-bandwidth product
and 120dB open-loop voltage gain while using only
100µA of supply current per amplifier. The combination
of low input offset voltage (±400µV) and high-open-loop
gain makes them suitable for low-power/low-voltage
high-precision applications.

The MAX4291/MAX4292/MAX4294 have an input com­mon-mode range that extends to each supply rail, and
their outputs typically swing within 20mV of the rails with
a 2kΩ load. Although the minimum operating voltage is
specified at +1.8V, these devices typically operate down
to +1.5V. The combination of ultra-low-voltage operation,
rail-to-rail inputs/output, and low-power consumption
makes these devices ideal for any portable/two-cell bat­tery-powered system.

The single MAX4291 is offered in an ultra-small 5-pin
SC70 package and the dual MAX4292 is offered in a
space-saving 8-pin µMAX package.

Applications

2-Cell Battery-Operated Systems

Portable Electronic Equipment

Battery-Powered Instrumentation

Digital Scales

Strain Gauges

Sensor Amplifiers

Cellular Phones

Features

♦ Ultra-Low Voltage Operation—Guaranteed Down

to +1.8V

♦ 100µA Supply Current per Amplifier

♦ 500kHz Gain-Bandwidth Product

♦ 120dB Open-Loop Voltage Gain (R

L

= 100kΩ)

♦ 0.017% THD + Noise at 1kHz

♦ Rail-to-Rail Input Common-Mode Range
♦ Rail-to-Rail Output Drives 2kΩ Load

♦ No Phase Reversal for Overdriven Inputs

♦ Unity-Gain Stable for Capacitive Loads up to 100pF

♦ 400µV Input Offset Voltage

♦ Single Available in Ultra-Small 5-Pin SC70

Dual Available in Space-Saving 8-Pin µMAX

*Future product—contact factory for availability.

MAX4291/MAX4292/MAX4294

Ultra-Small, +1.8V, µPower,
Rail-to-Rail I/O Op Amps

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +1.8V to +5.5V, VEE= VCM= 0, V

OUT

= V

CC

/ 2, RL= 100kΩ connected to V

CC

/ 2, TA= +25°C, unless otherwise noted.)

(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 V

EE)

..................................................+6V

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

CC

+ 0.3V) to (VEE- 0.3V)

Output Short-Circuit Duration.....................................Continuous

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 µMAX (derate 4.10mW/°C above +70°C)..............330mW

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

14-Pin SO (derate 8.33mW/°C above +70°C) ................667mW

14-Pin TSSOP (derate 6.3mW/°C above +70°C) ............500mW

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

80 100

80 100

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

MAX4291EXK, MAX4291EUK

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

MAX4291EXK, MAX4291EUK

70 90

70 90

Tested for
0 ≤ V

CM

≤

5.0V,
V

CC

= 5.0V

dB

60 90

65 85

65 85

Common-Mode Rejection Ratio CMRR

Tested for
0 ≤ V

CM

≤

1.8V;
VCC= 1.8V

dB

50 80

Power-Supply Rejection Ratio PSRR dB

80 100MAX4291EXK, MAX4291EUK

V

OS

110 225VCC= 5.0V

PARAMETER SYMBOL MIN TYP MAX UNITS

Input Bias Current I

B

±15 ±55 nA

±400 ±1500

±400 ±1500

Input Offset Voltage

±400 ±2500

µV

Input Offset Current I

OS

±1 ±7 nA

Differential Input Resistance R

IN

0.75 MΩ

Input Common-Mode Voltage
Range

V

CM

0V

CC

V

Quiescent Supply Current
(per Amplifier)

Supply Voltage Range V

CC

1.8 5.5 V

I

Q

100 210

µA

CONDITIONS

VCC= 5.0V, 0 ≤ VCM≤ 5.0V

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

MAX4291EXK, MAX4291EUK

VCC= 5.0V, 0 ≤ VCM≤ 5.0V

|V

IN+

- V

IN-

| < 10mV

Inferred from CMRR test

Inferred from PSRR test

VCC= 1.8V

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

MAX4291/MAX4292/MAX4294

Ultra-Small, +1.8V, µPower,

Rail-to-Rail I/O Op Amps

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS

(VCC= +1.8V to +5.5V, VEE= VCM= 0, V

OUT

= V

CC

/ 2, RL= 100kΩ connected to V

CC

/ 2, TA= T

MIN

to T

MAX

, unless otherwise

noted.) (Note 1)

ELECTRICAL CHARACTERISTICS

(VCC= +1.8V to +5.5V, VEE= VCM= 0, V

OUT

= V

CC

/ 2, RL= 100kΩ connected to V

CC

/ 2, TA= +25°C, unless otherwise noted.)

(Note 1)

Channel-to-Channel Isolation

Gain Bandwidth Product

Phase Margin

Gain Margin

Slew Rate

Input Voltage Noise Density

Input Current Noise Density

Capacitive-Load Stability

CH

ISO

GBW

φ

M

G

M

SR

e

n

i

n

Specified at f = 10kHz (MAX4292/MAX4294 only)

f = 10kHz

f = 10kHz

A

VCL

= +1V/V, no sustained oscillations

100

500

65

12

0.2

70

0.05

100 pF

pA/√Hz

nV/√Hz

V/µs

dB

degrees

kHz

dB

mA20Sourcing or sinkingI

OUT(SC)

Output Short-Circuit Current

Output Voltage Swing Low V

OL

Specified as
|V

EE

– VOL|

RL= 2kΩ to V

CC

/ 2

RL= 100kΩ to V

CC

/ 2

18 40

315

mV

mV

15 40

220

RL= 2kΩ to V

CC

/ 2

RL= 100kΩ to V

CC

/ 2

Specified as
|V

CC

– VOH|

V

OH

Output Voltage Swing High

Large-Signal Voltage Gain A

V

VCC= 5.0V

VCC= 1.8V

RL= 100kΩ,

0.015V ≤ V

OUT

≤ VCC- 0.015V

RL= 2kΩ,

0.1V ≤ V

OUT

≤ VCC- 0.1V

RL= 100kΩ,

0.015V ≤ V

OUT

≤ VCC- 0.015V

RL= 2kΩ,

0.1V ≤ V

OUT

≤ VCC- 0.1V

80 120

80 130

80 110

80 120

dB

UNITSMIN TYP MAXCONDITIONSSYMBOLPARAMETER

270VCC= 5.0V

PARAMETER SYMBOL MIN TYP MAX UNITS

±1500

±1500

Input Offset Voltage V

OS

±3000

µV

Quiescent Supply Current
(per Amplifier)

Supply Voltage Range V

CC

1.8 5.5 V

I

Q

240

µA

CONDITIONS

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

MAX4291EXK, MAX4291EUK

Inferred from PSRR test

VCC= 1.8V

MAX4292ESA, MAX4294ESD

Ultra-Small, +1.8V, µPower,
Rail-to-Rail I/O Op Amps

4 _______________________________________________________________________________________

Note 1: All devices are 100% tested at TA= +25°C. All temperature limits are guaranteed by design.

VCC= 5.0V, 0 ≤ VCM≤ 5.0V

VCC= 5.0V, 0 ≤ VCM≤ 5.0V

Specified as
|VEE– VOL|

Specified as
|VCC– VOH|

Inferred from CMRR test

Tested for
0 ≤ VCM≤ 1.8V,
V

CC

= 1.8V

MAX4291EXK, MAX4291EUK

VCC= 1.8V

CONDITIONS

nA±10I

OS

Input Offset Current

nA±80I

B

µV/°C1.2TCV

OS

Input Offset Voltage Drift

Input Bias Current

mV

15

V

OL

Output Voltage Swing Low

mV

20

V

OH

Output Voltage Swing High

V0V

CC

V

CM

Input Common-Mode Voltage
Range

dB

50

CMRRCommon-Mode Rejection Ratio

dB

78

PSRRPower-Supply Rejection Ratio

dB

80

A

V

Large-Signal Voltage Gain

UNITSMIN TYP MAXSYMBOLPARAMETER

MAX4291EXK, MAX4291EUK

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

MAX4291EXK, MAX4291EUK

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

Tested for
0 ≤ VCM≤ 5.0V,
VCC= 5.0V

65

65

60

60

60

dB

80

80

RL= 100kΩ,

0.015V ≤ V

OUT

≤ VCC- 0.015V

RL= 2kΩ,

0.1V ≤ V

OUT

≤ VCC- 0.1V

RL= 100kΩ,

0.015V ≤ V

OUT

≤ VCC- 0.015V

RL= 2kΩ,

0.1V ≤ V

OUT

≤ VCC- 0.1V

VCC= 5.0V

80

80

80

RL= 100kΩ to V

CC

/ 2

RL= 100kΩ to V

CC

/ 2

RL= 2kΩ to V

CC

/ 2

RL= 2kΩ to V

CC

/ 2

40

40

ELECTRICAL CHARACTERISTICS

(VCC= +1.8V to +5.5V, VEE= VCM= 0, V

OUT

= V

CC

/ 2, RL= 100kΩ connected to V

CC

/ 2, TA= T

MIN

to T

MAX

, unless otherwise

noted.) (Note 1)

MAX4291/MAX4292/MAX4294

MAX4292ESA, MAX4294ESD

MAX4292EUA, MAX4294EUD

Ultra-Small, +1.8V, µPower,

Rail-to-Rail I/O Op Amps

MAX4291/MAX4292/MAX4294

_______________________________________________________________________________________ 5

1.0

1.2

1.1

1.5

1.4

1.3

1.6

1.7

1.9

1.8

2.0

-55 -25 -10-40

520355065 80 95 110

MINIMUM OPERATING VOLTAGE

vs. TEMPERATURE (PSRR ≥80dB)

MAX4291 toc02

TEMPERATURE (°C)

MINIMUM OPERATING VOLTAGE (V)

125

-900

-600

-750

-300

-450

-150

0

-55 -25 -10 5-40 20 5035 65 80 95 110125

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

MAX4291 toc03

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE (µV)

VCC = 5.5V

VCC = 1.8V

VCC = 2.4V

0

10

5

20

15

30

25

35

-55 -25 -10 5-40 20 35 50 65 80 95 110 125

INPUT BIAS CURRENT

vs. TEMPERATURE

MAX4291 toc04

TEMPERATURE (°C)

INPUT BIAS CURRENT (nA)

VCC = 5.5V

VCC = 1.8V

-40

-30

-20

-10

0

10

20

30

40

-0.5 0.50 1.0 1.5 2.0 2.5

INPUT BIAS CURRENT vs. COMMON-MODE

VOLTAGE (V

CC

= 1.8V)

MAX4291 toc05

COMMON-MODE VOLTAGE (V)

INPUT BIAS CURRENT (nA)

-40

-10

-20

-30

0

10

30

20

40

-0.5 0.5 1.5 2.5 3.5

4.5 5.5

INPUT BIAS CURRENT vs. COMMON-MODE

VOLTAGE (V

CC

= 5.5V)

MAX4291 toc06

COMMON-MODE VOLTAGE (V)

INPUT BIAS CURRENT (nA)

0.0

1.0

0.5

2.0

1.5

3.0

2.5

3.5

-55 -25 -10 5-40 20 35 50 65 80 95 110 125

OUTPUT VOLTAGE SWING vs.

TEMPERATURE (R

L

= 100kΩ to V

CC

/ 2)

MAX4291 toc07

TEMPERATURE (°C)

OUTPUT VOLTAGE SWING (mV)

VOL (VCC = 5.5V)

V

OH

= VCC - V

OUT

V

OL

= V

OUT

- V

EE

VOH (VCC = 5.5V)

VOH (VCC = 1.8V)

VOL (VCC = 1.8V)

0

10

5

20

15

30

25

35

-55 -25 -10 5-40 20 35 50 65 80 95 110 125

OUTPUT VOLTAGE SWING vs.

TEMPERATURE (R

L

= 2kΩ to V

CC

/ 2)

MAX4291 toc08

TEMPERATURE (°C)

OUTPUT VOLTAGE SWING (mV)

VOL (VCC = 5.5V)

V

OH

= VCC - V

OUT

V

OL

= V

OUT

- V

EE

VOH (VCC = 5.5V)

VOH (VCC = 1.8V)

VOL (VCC = 1.8V)

-105

-90

-95

-100

-85

-80

-70

-75

-65

-55 -25 -10-40 5 203550658095110125

COMMON-MODE REJECTION

RATIO vs. TEMPERATURE

MAX4291 toc09

TEMPERATURE (°C)

CMRR (dB)

VCC = 5.5V

VCC = 1.8V

0 ≤ V

CM

≤ V

CC

Typical Operating Characteristics

(VCC= +2.4V, VEE= VCM= 0, V

OUT

= V

CC

/ 2, no load, TA= +25°C, unless otherwise noted.)

60

80

70

110

100

90

120

130

150

140

160

-55 -25 -10-40

520355065 80 95 110

SUPPLY CURRENT PER AMPLIFIER

vs. TEMPERATURE

MAX4291 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

125

VCC = 5.5V

VCC = 1.8V