Rainbow Electronics MAX4249, MAX4257 User Manual

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 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-to­rail and their input common-mode voltage range
includes ground. The MAX4250–MAX4254 are unity­gain stable with a gain-bandwidth product of 3MHz.
The MAX4249/MAX4255/MAX4256/MAX4257 are inter­nally compensated for gains of 10V/V or greater with a
gain-bandwidth product of 22MHz. The single
MAX4250/MAX4255 are available in space-saving 5-pin
SOT23 packages. The MAX4252 is available in an 8-pin
ultra chip-scale package (UCSP™) and the MAX4253 is
available in a 10-pin UCSP.

Applications

Wireless Communications Devices

PA Control

Portable/Battery-Powered Equipment

Medical Instrumentation

ADC Buffers

Digital Scales/Strain Gauges

Features

♦ Available in Space-Saving UCSP, SOT23, and

µMAX Packages

♦ 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 AV≥ 10V/V
(MAX4249/MAX4255/MAX4256/MAX4257)

♦ Excellent DC Characteristics

VOS= 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

MAX4249–MAX4257

UCSP, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

________________________________________________________________ Maxim Integrated Products 1

19-1295; Rev 4; 1/02

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.

Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.

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

UCSP is a trademark of Maxim Integrated Products, Inc.

Pin Configurations continued at end of data sheet.

Pin Configurations

Ordering Information

TOP VIEW

(BUMPS ON BOTTOM)

12 3

V

OUTA

A

B

C

INA-

INA+

DD

MAX4252

V

SS

OUTB

INB-

INB+

PART TEMP RANGE

MAX4249ESD

MAX4249EUB -40°C to +85°C 10 µMAX —

MAX4250EUK-T

-40°C to +85°C 14 SO —

-40°C to +85°C 5 SOT23-5 ACCI

PIN­PACKAGE

TOP

MARK

A4

A3

A2

OUTB

V

OUTA

A1

INB-

B1

DD

C1

MAX4253

C2 C3

INA-

INB+

INA+

SHDNB

V

C4

SHDNA

B4

SS

UCSP

UCSP

MAX4249–MAX4257

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

OUT

= VDD/2, RLtied to VDD/2, SHDN = VDD, TA= -40°C to +85°C, unless otherwise noted. Typical

values are at T

A

= +25°C.) (Notes 2, 3)

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 4.5mW/°C above +70°C) ............362mW

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

8-Pin UCSP (derate 4.7mW/°C above +70°C) ............379mW

10-Pin UCSP (derate 6.1mW/°C above +70°C) ...........484mW

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 +150°C

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

Bump Temperature (soldering) (Note 1)

Infrared (15s) ................................................................+220°C

Vapor Phase (60s) ........................................................+215°C

Note 1: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device

can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles rec­ommended in the industry-standard specification, JEDEC 020A, paragrah 7.6, Table 3 for IR/VPR and Convection Reflow.
Preheating is required. Hand or wave soldering is not allowed.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range V

Quiescent Supply Current Per
Amplifier

Input Offset Voltage (Note 5) V

Input Offset Voltage Tempco TCV

Input Bias Current I

Input Offset Current I

Differential Input Resistance R

Input Common-Mode Voltage
Range

Common-Mode Rejection Ratio CMRR VSS - 0.2V ≤ VCM ≤ VDD - 1.1V 70 115 dB

Power-Supply Rejection Ratio PSRR VDD = 2.4 to 5.5V 75 100 dB

Large-Signal Voltage Gain A

Output Voltage Swing V

I

OS

V

OUT

(Note 4) 2.4 5.5 V

DD

VDD = 3V 400

Q

Shutdown mode (SHDN = VSS) (Note 2) 0.5 1.5

OS

OS

(Note 6) ±1 ±100 pA

B

(Note 6) ±1 ±100 pA

IN

Guaranteed by CMRR test -0.2 V

CM

RL = 10kΩ to VDD/2;
V

= 25mV to V

OUT

V

RL = 1kΩ to VDD/2;
V

= 150V to V

OUT

|V

- V

IN+

R

IN-

= 10kΩ to V

L

VDD = 5V 420 575Normal mode

V

| ≥ 10mV

DD

= 5V, UCSP only 420 655

DD

±0.07 ±0.75 mV

0.3 µV/°C

1000 GΩ

DD

DD

/2

- 4.97V

- 4.75V

V

- V

DD

OH

V

- V

OL

SS

80 116

80 112

825

720

- 1.1 V

DD

µA

dB

mV

MAX4249–MAX4257

UCSP, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

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

OUT

= VDD/2, RLtied to VDD/2, SHDN = VDD, TA= -40°C to +85°C, unless otherwise noted. Typical

values are at T

A

= +25°C.) (Notes 2, 3)

D

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Voltage Swing V

Output Short-Circuit Current I

Output Leakage Current I

SHDN Logic Low V

SHDN Logic High V

SHDN Input Current IIL/I

Input Capacitance 11 pF

Gain-Bandwidth Product GBW

Slew Rate SR

Peak-to-Peak Input-Noise
Voltage

Input Voltage-Noise Density e

Input Current-Noise Density i

OUT

SC

LEAK

e

n

V

- V

DD

|V

IN+

= 1kΩ to V

R

L

- V

| ≥ 10mV,

IN-

DD

/2

OH

V

- V

OL

SS

Shutdown mode (SHDN = VSS),
V

= V

to V

OUT

(Note 2) 0.2 X V

IL

(Note 2) 0.8 X V

IH

SHDN = V

IH

SS

SS

(Note 2)

DD

= V

(Note 2) 0.5 1.5 µA

DD

MAX4250–MAX4254

MAX4249/MAX4255/MAX4256/MAX4257

MAX4250–MAX4254

MAX4249/MAX4255/MAX4256/MAX4257

f = 0.1Hz to 10Hz

P-P

f = 10Hz

f = 1kHz

n

f = 30kHz

n

f = 1kHz

77 200

47 100

68 mA

0.001 1.0 µA

DD

3

22

0.3

2.1

760 nV

2.7

8.9

7.9

0.5 fA/√Hz

D

nV/√Hz

mV

V

V

MHz

V/µs

P-P

Total Harmonic Distortion Plus
Noise

Capacitive-Load Stability

Gain Margin GM

Phase Margin ΦM

THD + N

MAX4250–MAX4254

= 1V/V, V

A

V

R

= 1kΩ to GND

L

OUT

= 2V

(Note 7)

MAX4249/MAX4255/

P-P

,

f = 1kHz

f = 20kHz

f = 1kHz

0.0004

0.006

0.0012

MAX4256/MAX4257

= 1V/V, V

A

V

= 1kΩ to GND (Note 7)

R

L

No sustained oscillations

OUT

= 2V

P-P

,

f = 20kHz

0.007

400 pF

MAX4250–MAX4254, AV = 1V/V 10

MAX4249/MAX4255/MAX4256/MAX4257,
A

= 10V/V

V

12.5

MAX4250–MAX4254, AV = 1V/V 74

MAX4249/MAX4255/MAX4256/MAX4257,
A

= 10V/V

V

68

%

dB

degrees

MAX4249–MAX4257

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

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

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

OUT

= VDD/2, RLtied to VDD/2, SHDN = VDD, TA= -40°C to +85°C, unless otherwise noted. Typical

values are at T

A

= +25°C.) (Notes 2, 3)

Note 2: SHDN is available on the MAX4249/MAX4251/MAX4253/MAX4256 only.
Note 3: All device specifications are 100% tested at T

A

= +25°C. Limits over temperature are guaranteed by design.

Note 4: Guaranteed by the PSRR test.
Note 5: Offset voltage prior to reflow on the UCSP.
Note 6: Guaranteed by design.
Note 7: Lowpass-filter bandwidth is 22kHz for f = 1kHz and 80kHz for f = 20kHz. Noise floor of test equipment = 10nV/√Hz.

Settling Time

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX4250–MAX4254 6.7

To 0.01%,
= 2V step

V

OUT

MAX4249/MAX4255/
MAX4256/MAX4257

1.6

µs

I

Delay Time to Shutdown t

Delay Time to Enable t

Power-Up Delay Time t

SH

EN

PU

VDD = 5% of

normal
operation

V

OUT = 2.5V,

V

OUT settles to

0.1%

V

DD = 0 to 5V step, VOUT stable to 0.1%

MAX4251/MAX4253 0.8

MAX4249/MAX4256 1.2

MAX4251/MAX4253 8

MAX4249/MAX4256 3.5

6µs

µs

µs

MAX4249–MAX4257

UCSP, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

_______________________________________________________________________________________ 5

Typical Operating Characteristics

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

OUT

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

T

A

= +25°C, unless otherwise noted.)

MAX4251/MAX4256

INPUT OFFSET VOLTAGE DISTRIBUTION

40

35

30

25

20

15

NUMBER OF UNITS

10

5

0

-95

-75

-55

-35

-13

7

284969

VOS (µV)

90

400 UNITS

V

CM

= +25°C

T

A

110

131

152

= 0

172

MAX4249-57 TOC01

192

OFFSET VOLTAGE

vs. TEMPERATURE

250

VCM = 0

200

150

100

50

(µV)

0

OS

V

-50

-100

-150

-200

-250

-40 0-20 20 40 60 80

TEMPERATURE (°C)

MAX4249-57 TOC02

200

150

100

INPUT OFFSET VOLTAGE (µV)

INPUT OFFSET VOLTAGE vs.

INPUT COMMON-MODE VOLTAGE

50

0

-50

-0.5 1.50.5 2.5 3.5 4.5
INPUT COMMON-MODE VOLTAGE (V)

VDD = 3V VDD = 5V

MAX4249-57 TOC03

OUTPUT VOLTAGE vs.

OUTPUT LOAD CURRENT

0.6

VDD = 3V OR 5V

= ±10mV

V

DIFF

0.5

0.4

0.3

0.2

OUTPUT VOLTAGE (V)

0.1

0

04312 5678910

OUTPUT LOAD CURRENT (mA)

VDD - V

OH

V

LARGE-SIGNAL VOLTAGE GAIN

vs. OUTPUT VOLTAGE SWING

140

130

120

110

(dB)

100

V
A

90

80

70

60

50

0 10050 150 200 250

V

OUT

R

SWING FROM EITHER SUPPLY (mV)

R

L

R

L

RL = 2kΩ

REFERENCED TO GND

L

OL

= 200kΩ

= 20kΩ

VDD = 3V

MAX4249-57 TOC04

MAX4249-57 TOC07

OUTPUT VOLTAGE SWING (VOH)

0.10

0.09

0.08

0.07

(V)

0.06

OH

- V

0.05

DD

V

0.04

0.03

0.02

0.01

0

-40 0-20 20 6040 80

vs. TEMPERATURE

RL = 1kΩ

TEMPERATURE (°C)

LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING

140

130

120

110

(dB)

V

A

100

90

80

70

60

0 50 100 150 200 250

V

OUT

= 20kΩ

R

L

R

= 2kΩ

L

R

REFERENCED TO GND

L

SWING FROM EITHER SUPPLY (mV)

RL = 10kΩ

RL = 100kΩ

= 200kΩ

R

L

VDD = 3V

MAX4249-57 TOC05

MAX4249-57 TOC08

OUTPUT VOLTAGE SWING (VOL)

0.06

0.05

0.04

(V)

OL

0.03

V

0.02

0.01

0

-40 0-20 20 6040 80

vs. TEMPERATURE

R

L

TEMPERATURE (°C)

LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING

= 200kΩ

R

L

= 20kΩ

R

L

90

80

70

60

50

0 10050 150 200 250

V

SWING FROM EITHER SUPPLY (mV)

OUT

R

R

REFERENCED TO GND

L

(dB)

V

A

140

130

120

110

100

= 1kΩ

RL = 10kΩ

R

= 100kΩ

L

= 2kΩ

L

VDD = 5V

MAX4249 -57TOC06

MAX4249-57 TOC09

MAX4249–MAX4257

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

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

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

OUT

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

T

A

= +25°C, unless otherwise noted.)

LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING

150

R

= 200kΩ

L

140

130

120

110

(dB)

V

A

100

90

80

70

60

50

0 10050 150 200 250

V

SWING FROM EITHER SUPPLY (mV)

OUT

= 20kΩ

R

L

RL = 2kΩ

R

REFERENCED TO GND

L

LARGE-SIGNAL VOLTAGE GAIN

vs. TEMPERATURE

RL REFERENCED TO VDD/2

= 5V

V

DD

= 100kΩ

R

L

V

= 10mV

OUT

TO 4.99mV

RL = 1kΩ
V

= 150mV

OUT

TO 4.75mV

TEMPERATURE (°C)

R

= 10kΩ

L

= 20mV

V

OUT

TO 4.975mV

MAX4249-57 TOC11

VDD = 5V

MAX4249-57 TOC10

125

120

115

(dB)

V

A

110

105

100

-40 0-20 20 6040 80

SUPPLY CURRENT AND SHUTDOWN

SUPPLY CURRENT vs. SUPPLY VOLTAGE

440

PER AMPLIFIER

420

SHDN = V

400

380

360

SUPPLY CURRENT (µA)

340

320

1.8 2.82.3 3.3 3.8 4.3 4.8 5.3 5.5

DD

SUPPLY VOLTAGE (V)

SHDN = V

MAX4249-57 TOC13

SS

MAX4250–MAX4254

GAIN AND PHASE vs. FREQUENCY

60

50

40

30

20

10

GAIN (dB)

0

-10

-20

-30

-40
100 10k 100k 1M1k 10M

GAIN

PHASE

FREQUENCY (Hz)

MAX4249-57 TOC16

VDD = 3V, 5V

R

= 50kΩ

L

= 20pF

C

L

= 1000

A

V

0.6

0.5

0.4

0.3

0.2

0.1

0

180

144

108

72

36

0

-36

-72

-108

-144

-180

2000

1000

400

SUPPLY CURRENT (µA)

SHUTDOWN SUPPLY CURRENT (µA)

100

0.001 0.1 10.01 5

MAX4249/MAX4255/MAX4256/MAX4257

60

50

40

30

20

10

GAIN (dB)

0

PHASE (DEGREES)

-10

-20

-30

-40
100 10k 100k 1M1k 10M

SUPPLY CURRENT

vs. OUTPUT VOLTAGE

VDD = 5V

VDD = 3V

OUTPUT VOLTAGE (V)

GAIN AND PHASE vs. FREQUENCY

VDD = 3V, 5V

= 50kΩ

R

L

= 20pF

C

L

= 1000

A

V

FREQUENCY (Hz)

MAX4249-57 TOC17

GAIN

PHASE

MAX4249-57 TOC14

180

144

108

72

36

0

-36

-72

-108

-144

-180

PHASE (DEGREES)

SUPPLY CURRENT AND SHUTDOWN

SUPPLY CURRENT vs. TEMPERATURE

460

PER AMPLIFIER

440

420

400

380

SUPPLY CURRENT (µA)

360

340

-40 0-20 20 6040 80

SHDN = V

DD

SHDN = V

TEMPERATURE (°C)

SS

INPUT OFFSET VOLTAGE

vs. SUPPLY VOLTAGE

180

160

RL REFERENCED TO GND

140

120

(µV)

OS

V

100

R

L

= 10kΩ

80

60

40

1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
SUPPLY VOLTAGE (V)

MAX4250–MAX4254

POWER-SUPPLY REJECTION RATIO

0

VDD = 3V, 5V

-10

-20

-30

-40

-50

-60

PSRR (dB)

-70

-80

-90

-100

-110
1 1k 10k 100k 1M10 100 10M

vs. FREQUENCY

PSRR+

PSRR-

FREQUENCY (Hz)

MAX4249-57 TOC12

V

OUT

R

= 100kΩ

L

V

= VDD/2

R

= 1kΩ

L

0.376

0.375

0.374

SHUTDOWN SUPPLY CURRENT (µA)

0.373

= 0

CM

MAX4249-57 TOC15

MAX4249-57 TOC18