Maxim MAX4256ESA, MAX4255EUK-T, MAX4254ESD, MAX4253EUB, MAX4253ESD Datasheet

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General Description

The MAX4249–MAX4257 low-noise, low-distortion oper­ational amplifiers offer Rail-to-Rail®outputs and single­supply operation down to 2.4V. They draw only 400µA
of quiescent supply current per amplifier while featuring
ultra-low distortion (0.0002% THD), as well as low input
voltage noise density (7.9nV/√Hz) and low input current
noise density (0.5fA/√Hz). These features make the
devices an ideal choice for portable/battery-powered
applications that require low distortion and/or low noise.

For additional power conservation, the MAX4249/
MAX4251/MAX4253/MAX4256 offer a low-power shut­down mode that reduces supply current to 0.5µA and
puts the amplifiers’ outputs into a high-impedance state.
The MAX4249–MAX4257’s outputs swing rail-to-rail and
their input common-mode voltage range includes
ground. The MAX4250–MAX4254 are unity-gain stable;
the MAX4249/MAX4255/MAX4256/MAX4257 are internal­ly compensated for gains of 10V/V or greater. The single
MAX4250/MAX4255 are available in a space-saving,
5-pin SOT23 package.

Applications

Portable/Battery-Powered Equipment
Medical Instrumentation
ADC Buffers
Digital Scales
Strain Gauges
Sensor Amplifiers
Portable Communications Devices

____________________________Features

♦ Low Input Voltage Noise Density: 7.9nV/√Hz
♦ Low Input Current Noise Density: 0.5fA/√Hz
♦ Low Distortion: 0.0002% THD (1kΩ load)
♦ 400µA Quiescent Supply Current per Amplifier
♦ Single-Supply Operation from +2.4V to +5.5V
♦ Input Common-Mode Voltage Range Includes

Ground

♦ Outputs Swing within 8mV of Rails with a 10kΩ Load
♦ 3MHz GBW Product, Unity-Gain Stable

(MAX4250–MAX4254)
22MHz GBW Product, Stable with A

V

≥ 10V/V

(MAX4249/MAX4255/MAX4256/MAX4257)

♦ Excellent DC Characteristics:

V

OS

= 70µV

I

BIAS

= 1pA

Large-Signal Voltage Gain = 116dB

♦ Low-Power Shutdown Mode:

Reduces Supply Current to 0.5µA
Places Outputs in a High-Impedance State

♦ 400pF Capacitive-Load Handling Capability
♦ Available in Space-Saving SOT23 and µMAX

Packages

MAX4249–MAX4257

SOT23, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

________________________________________________________________

Maxim Integrated Products

1

19-1295; Rev 2; 4/98

PART

MAX4249ESD

MAX4249EUB -40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

14 SO
10 µMAX

Ordering Information

Selector Guide

Ordering Information continued at end of data sheet.

Pin Configurations and Typical Operating Circuit appear at
end of data sheet.

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

GAIN

BANDWIDTH

(MHz)

MAX4249 22

PART

MINIMUM

STABLE

GAIN (V/V)

10

SHUTDOWN

MODE

PACKAGES

2 Yes 10-pin µMAX, 14-pin SO

NO. OF AMPLIFIERS

PER PACKAGE

MAX4250 3 1 1 — 5-pin SOT23
MAX4251 3 1 1 Yes 8-pin µMAX/SO
MAX4252 3 1 2 — 8-pin µMAX/SO
MAX4253 3 1 2 Yes 10-pin µMAX, 14-pin SO
MAX4254 3 1 4 — 14-pin SO
MAX4255 22 10 1 — 5-pin SOT23
MAX4256 22 10 1 Yes 8-pin µMAX/SO
MAX4257 22 10 2 — 8-pin µMAX/SO

SOT

TOP MARK

—
—

MAX4250EUK-T

-40°C to +85°C 5 SOT23-5 ACCI

MAX4249–MAX4257

SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

OUT

= VDD/2, RLtied to VDD/2, SHDN = VDDor open, TA= -40°C to +85°C, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Notes 1, 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.

Power-Supply Voltage (VDDto VSS)......................+6.0V to -0.3V

Analog Input Voltage (IN_+, IN_-)....(V

DD

+ 0.3V) to (VSS- 0.3V)

SHDN Input Voltage....................................+6.0V to (V

SS

- 0.3V)

Output Short-Circuit Duration to Either Supply ..........Continuous

Continuous Power Dissipation (T

A

= +70°C)

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

10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW

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

Operating Temperature Range ...........................-40°C to +85°C

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

Storage Temperature Range.............................-65°C to +160°C

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

Normal mode

SHDN = VSSto V

DD

(Note 3)

Shutdown mode (SHDN = VSS),
V

OUT

= VSSto V

DD

V

IN+

- V

IN-

≥ 10mV,

R

L

= 10kΩ to VDD/2

VSS- 0.2V ≤ VCM≤ VDD- 1.1V

Guaranteed by CMRR test

RL= 1kΩ to VDD/2, V

OUT

= 150mV to 4.75V

(Note 4)

Shutdown mode (SHDN = VSS) (Note 1)

RL= 10kΩ to VDD/2, V

OUT

= 25mV to 4.97V

(Note 4)

VDD= 2.4V to 5.5V

CONDITIONS

pF11Input Capacitance

µA0.5 1.5IIL/I

IH

SHDN Input Current

V0.8 x V

DD

V

IH

SHDN Logic High

V0.2 x V

DD

V

IL

SHDN Logic Low

µA0.001 1.0I

LEAK

Output Leakage Current

mA68I

SC

Output Short-Circuit Current

7 20

V

IN+

- V

IN-

≥ 10mV,

R

L

= 1kΩ to VDD/2

8 25

dB

80 112

A

V

80 116

Large-Signal Voltage Gain

dB75 100PSRRPower-Supply Rejection Ratio

420 575

400

V2.4 5.5V

DD

Supply-Voltage Range

Quiescent Supply Current
per Amplifier

dB70 115CMRR

Common-Mode Rejection
Ratio

V-0.2

V

DD

-

1.1

V

CM

Input Common-Mode Voltage
Range

GΩ1000R

IN

Differential Input Resistance

pA±1 ±100I

OS

Input Offset Current

µA

0.5 1.5

I

Q

±0.07 ±0.75V

OS

mVInput Offset Voltage

pA±1 ±100I

B

Input Bias Current

UNITSMIN TYP MAXSYMBOLPARAMETER

0.3 µV/°CInput Offset Voltage Tempco

mV

47 100

V

OUT

77 200

Output Voltage Swing

VDD= 3V
VDD= 5V

VDD- V

OH

VOL- V

SS

VDD- V

OH

VOL- V

SS

MAX4249–MAX4257

SOT23, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

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

OUT

= VDD/2, RLtied to VDD/2, SHDN = VDDor open, TA= -40°C to +85°C, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Notes 1, 2)

Note 1: SHDN is available on the MAX4249/MAX4251/MAX4253/MAX4256 only.
Note 2: The MAX4249EUB, MAX425_EU_ specifications are 100% tested at T

A

= +25°C. Limits over the extended temperature

range are guaranteed by design, not production tested.

Note 3: Guaranteed by the Power-Supply Rejection Ratio (PSRR) test.
Note 4: Guaranteed by design.
Note 5: Lowpass filter bandwidth is 22kHz for f = 1kHz, and 80kHz for f = 20kHz. Noise floor of test equipment = 10nV/√Hz.

No sustained oscillations

f = 1kHz

MAX4250–MAX4254

f = 30kHz

f = 1kHz

f = 0.1Hz to 10Hz

MAX4249/MAX4255/MAX4256/MAX4257

f = 10Hz

CONDITIONS

pF400

0.006

0.0004

fA/√Hz

0.5i

n

Input Current Noise Density

nV/√Hz

7.9

e

n

8.9

27

Input Voltage Noise Density

3

Gain-Bandwidth Product

nVp-p760en(p-p)

Peak-to-Peak Input Noise
Voltage

MHz

22

GBW

UNITSMIN TYP MAXSYMBOLPARAMETER

MAX4250–MAX4254
MAX4249/MAX4255/MAX4256/MAX4257

0.3

Slew Rate V/µs

2.1

SR

MAX4250–MAX4254, AV= +1V/V

MAX4249/MAX4255/MAX4256/MAX4257,
A

V

= +10V/V

MAX4250–MAX4254, AV= +1V/V

74

dB

12.5

G

M

Gain Margin

10

MAX4249/MAX4255/MAX4256/MAX4257,
A

V

= +10V/V

µs

1.6

Settling Time

6.7

degrees

68

Φ

M

Phase Margin

VDD= 0V to 5V step, V

OUT

stable to 0.1% µs6t

PU

Power-Up Delay Time

MAX4250–MAX4254, AV= +1V/V,
V

OUT

= 2Vp-p, RL= 1kΩ to GND

(Note 5)

f = 1kHz
f = 20kHz

Capacitive-Load Stability

0.0012

Total Harmonic
Distortion plus Noise

MAX4249/MAX4255/MAX4256/
MAX4257, AV= +10V/V,
RF= 100kΩ, RG= 11kΩ,
V

OUT

= 4Vp-p, RL= 10kΩ to GND

(Note 5)

%THD+N

MAX4250–MAX4254
MAX4249/MAX4255/MAX4256/

MAX4257

To 0.01%,
V

OUT

= 2V step

MAX4251/MAX4253

I

VDD

= 5% of

normal operation

µst

SH

Shutdown Delay Time

0.8

V

OUT

= 2.5V,

V

OUT

settles to

0.1%

µs

8

t

EN

Enable Delay Time

f = 20kHz 0.007

f = 1kHz

MAX4251/MAX4253

3.5MAX4249/MAX4256

1.2MAX4249/MAX4256

MAX4249–MAX4257

SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps

4 _______________________________________________________________________________________

Typical Operating Characteristics

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

OUT

= VDD/2, input noise floor of test equipment = 10nV/√Hz for all distortion measurements,

T

A

= +25°C, unless otherwise noted.)

0

10

5

20
15

25

30

35

40

-95

-55

-35

-75

-13

7

284969

90

110

131

152

172

192

MAX4251/MAX4256 INPUT OFFSET

VOLTAGE DISTRIBUTION

MAX4249 TOC01

VOS (µV)

NUMBER OF UNITS

400 UNITS

V

CM

= 0V

T

A

= +25°C

-250

-100

-150

-200

-50

0

50

100

150

200

250

-40 0-20 20 40 60 80

OFFSET VOLTAGE

vs. TEMPERATURE

MAX4249 TOC02

TEMPERATURE (°C)

V

OS

(µV)

VCM = 0V

-50

0

100

50

150

200

-0.5 1.50.5 2.5 3.5 4.5

INPUT OFFSET VOLTAGE vs.

COMMON-MODE INPUT VOLTAGE

MAX4249 TOC03

INPUT COMMON-MODE VOLTAGE (V)

INPUT OFFSET VOLTAGE (µV)

VDD = 3V VDD = 5V

0

0.3

0.2

0.1

0.4

0.5

0.6

0 431 2 5 6 7 8 9 10

OUTPUT VOLTAGE

vs. OUTPUT LOAD CURRENT

MAX4249 TOC04

OUTPUT LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

VDD = 3V OR 5V
V

DIFF

= ±10mV

V

OL

V

DD

- V

OH

50

70
60

100

90
80

130
120
110

140

0 10050 150 200 250

LARGE-SIGNAL VOLTAGE GAIN

vs. OUTPUT VOLTAGE SWING

MAX4249TOC07

V

OUT

SWING FROM EITHER SUPPLY (mV)

A

V

(dB)

V

DD

= 3V

R

L

REFERENCED TO GND

RL = 200kΩ

RL = 20kΩ

RL = 2kΩ

0

0.03

0.02

0.01

0.04

0.05

0.06

0.07

0.08

0.09

0.10

-40 0-20 20 6040 80

OUTPUT VOLTAGE SWING (VOH)

vs. TEMPERATURE

MAX4249 TOC05

TEMPERATURE (°C)

V

DD -

V

OH

(V)

RL = 1kΩ

RL = 10kΩ

RL = 100kΩ

0

0.02

0.01

0.03

0.04

0.05

0.06

-40 0-20 20 6040 80

OUTPUT VOLTAGE SWING (VOL)

vs. TEMPERATURE

MAX4249 TOC06

TEMPERATURE (°C)

V

OL

(V)

RL = 1kΩ

RL = 10kΩ

RL = 100kΩ

60

70

80

90

100

110

120

130

140

0 50 100 150 200 250

LARGE-SIGNAL VOLTAGE GAIN

vs. OUTPUT VOLTAGE SWING

MAX4249 TOC08

V

OUT

SWING FROM EITHER SUPPLY (mV)

A

V

(dB)

RL = 200kΩ

RL = 2kΩ

V

DD

= 3V

R

L

REFERENCED TO V

DD

RL = 20kΩ

50

70
60

100

90
80

130
120
110

140

0 10050 150 200 250

LARGE-SIGNAL VOLTAGE GAIN

vs. OUTPUT VOLTAGE SWING

MAX4249TOC09

V

OUT

SWING FROM EITHER SUPPLY (mV)

A

V

(dB)

V

DD

= 5V

R

L

REFERENCED TO GND

RL = 2kΩ

RL = 20kΩ

RL = 200kΩ

MAX4249–MAX4257

SOT23, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

_______________________________________________________________________________________

5

50

80
70
60

90

100

110

120

130

140

150

0 10050 150 200 250

LARGE-SIGNAL VOLTAGE GAIN

vs. OUTPUT VOLTAGE SWING

MAX4249 TOC10

V

OUT

SWING FROM EITHER SUPPLY (mV)

A

V

(dB)

RL = 200kΩ

RL = 20kΩ

RL = 2kΩ

V

DD

= 5V

R

L

REFERENCED TO V

DD

100

110

105

115

120

125

-40 0-20 20 6040 80

LARGE-SIGNAL VOLTAGE GAIN

vs. TEMPERATURE

MAX4249 TOC11

TEMPERATURE (°C)

A

V

(dB)

RL REFERENCED T0 VDD/2
V

DD

= 5V

RL = 100kΩ
V

OUT

= 10mV

to 4.99V

RL = 10kΩ
V

OUT

= 20mV

to 4.975V

RL = 1kΩ
V

OUT

= 150mV

to 4.75V

0.373

0.374

0.375

0.376

340

380

360

400

420

440

460

-40 0-20 20 6040 80

SUPPLY CURRENT AND SHUTDOWN

SUPPLY CURRENT vs. TEMPERATURE

MAX4249 TOC12

TEMPERATURE (°C)

SHUTDOWN SUPPLY CURRENT (µA)

SUPPLY CURRENT (µA)

SHDN = V

DD

PER AMPLIFIER

SHDN = V

SS

320

340

360

380

400

420

440

0

0.1

0.2

0.3

0.4

0.5

0.6

1.8 2.82.3 3.3 3.8 4.3 4.8 5.3 5.5

SUPPLY CURRENT AND SHUTDOWN

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4249 TOC 13A

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

SHUTDOWN SUPPLY CURRENT (µA)

PER AMPLIFIER

SHDN = V

SS

SHDN = V

DD

60

-40
100 10k 100k 1M1k 10M

MAX4250–MAX4254

GAIN AND PHASE vs. FREQUENCY

-20

-10

0

-30

MAX4249 TOC15

FREQUENCY (Hz)

GAIN (dB)

PHASE (DEGREES)

10

20

30

40

50

180

-180

-108

-72

-36

-144

0

36

72

108

144

GAIN

PHASE

VDD = 3V, 5V
R

L

= 50kΩ

C

L

= 20pF

A

V

= 1000

2000

100

0.001 0.1 10.01 5

SUPPLY CURRENT

vs. OUTPUT VOLTAGE

MAX4249 TOC13B

OUTPUT VOLTAGE (V)

SUPPLY CURRENT (µA)

1000

400

VDD = 5V

VDD = 3V

40

60

80

120

100

180

160

140

1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3

INPUT OFFSET VOLTAGE

vs. SUPPLY VOLTAGE

MAX4249 TOC14

SUPPLY VOLTAGE (V)

V

OS

(µV)

VCM = 0V
V

OUT

= VDD/2

R

L

REFERENCED TO GND

RL = 1kΩ

RL = 10kΩ

RL = 100kΩ

60

-40
100 10k 100k 1M1k 10M

MAX4249, MAX4255/MAX4256/MAX4257

GAIN AND PHASE vs. FREQUENCY

-20

-10

0

-30

MAX4249 TOC16

FREQUENCY (Hz)

GAIN (dB)

PHASE (DEGREES)

10

20

30

40

50

180

-180

-108

-72

-36

-144

0

36

72

108

144

VDD = 3V, 5V
R

L

= 50kΩ

C

L

= 20pF

A

V

= 1000

GAIN

PHASE

0

-100

-110

1 1k 10k 100k 1M10 100 10M

MAX4250–MAX4254

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

-80

-70

-60

-90

MAX4249 TOC17

FREQUENCY (Hz)

PSRR (dB)

-50

-40

-30

-20

-10

PSRR+

VDD = 3V, 5V

PSRR-

Typical Operating Characteristics (continued)

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

OUT

= VDD/2, input noise floor of test equipment = 10nV/√Hz for all distortion measurements,

T

A

= +25°C, unless otherwise noted.)