MAXIM 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-bump chipscale package (UCSP™) and the MAX4253 is available in
a 10-bump UCSP. The MAX4250AAUK comes in a 5-pin
SOT23 package and is specified for operation over the
automotive (-40°C to +125°C) temperature range.
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 7; 4/05
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.
UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.
A
B
C
12 3
OUTA
V
DD
OUTB
INA-
INB-
INB+
V
SS
INA+
MAX4252
OUTA
V
DD
OUTB
INA-
INB-
INA+
INB+
V
SS
SHDNA
SHDNB
MAX4253
C1
B1
A1
A2
A3
A4
B4
C2 C3
C4
TOP VIEW
(BUMPS ON BOTTOM)
UCSP
UCSP
Pin Configurations continued at end of data sheet.
Pin Configurations
Ordering Information
PART
TEMP RANGE
PIN-
TOP
MARK
MAX4249ESD
14 SO —
MAX4249EUB
10 µMAX —
MAX4250EUK-T
5 SOT23-5
ACCI
M AX 4250AAU K- T
5 SOT23-5
AEYJ
PACKAGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
- 40°C to + 125°C
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= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues 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-Bump UCSP (derate 4.7mW/°C above +70°C)........379mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ............362mW
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
10-Bump 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
MAX4250AAUK .............................................-40°C to +125°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
PARAMETER
SYMBOL
CONDITIONS MIN TYP
MAX
UNITS
Supply Voltage Range V
DD
(Note 4) 2.4 5.5 V
VDD = 3V 400
E temperature 420 575
MAX4250AAUK 675
Normal
mode
V
DD
= 5V, UCSP only 420 655
Quiescent Supply Current Per
Amplifier
I
Q
Shutdown mode (SHDN = VSS) (Note 2) 0.5 1.5
µA
E temperature
Input Offset Voltage (Note 5) V
OS
MAX4250AAUK
mV
Input Offset Voltage Tempco
0.3
µV/°C
E temperature ±1
pA
Input Bias Current I
B
(Note 6)
MAX4250AAUK
nA
E temperature ±1
pA
Input Offset Current I
OS
(Note 6)
MAX4250AAUK
nA
Differential Input Resistance R
IN
GΩ
E temperature -0.2
Input Common-Mode Voltage
Range
V
CM
Guaranteed by
CMRR test
MAX4250AAUK 0
V
E temperature 70 115
Common-Mode Rejection Ratio
VSS - 0.2V ≤ VCM ≤
V
DD
- 1.1V
MAX4250AAUK 68
dB
E temperature 75 100
Power-Supply Rejection Ratio
VDD = 2.4V to 5.5V
MAX4250AAUK 72
dB
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, paragraph 7.6, Table 3 for IR/VPR and Convection
Reflow. Preheating is required. Hand or wave soldering is not allowed.
VDD = 5V
TCV
OS
CMRR
PSRR
±0.07 ±0.75
±1.85
±100
±10
±100
±10
1000
V
-1.1
DD
V
-1.1
DD
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= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
CONDITIONS MIN TYP
UNITS
E temperature 80 116
RL = 10kΩ to VDD/2;
V
OUT
= 25mV to V
DD
- 4.97V
MAX4250AAUK 77
E temperature 80 112
Large-Signal Voltage Gain A
V
RL = 1kΩ to VDD/2;
V
OUT
= 150V to V
DD
-
4.75V
MAX4250AAUK 77
dB
E825
A30
E720
Output Voltage Swing V
OUT
|V
IN+
- V
IN-
| ≥ 10mV;
R
L
= 10kΩ to V
DD
/2
A25
mV
E 77 200
A 225
E 47 100
Output Voltage Swing V
OUT
|V
IN+
- V
IN-
| ≥ 10mV,
R
L
= 1kΩ to VDD/2
A 125
mV
Output Short-Circuit Current I
SC
68 mA
Output Leakage Current I
LEAK
Shutdown mode (SHDN = VSS),
V
OUT
= V
SS
to V
DD
(Note 2)
1.0 µA
SHDN Logic Low V
IL
(Note 2)
V
SHDN Logic High V
IH
(Note 2)
V
SHDN Input Current IIL/I
IH
SHDN = VSS = VDD (Note 2) 0.5 1.5 µA
Input Capacitance 11 pF
MAX4250–MAX4254
3
Gain-Bandwidth Product GBW
MAX4249/MAX4255/MAX4256/MAX4257
22
MHz
MAX4250–MAX4254
0.3
Slew Rate SR
MAX4249/MAX4255/MAX4256/MAX4257
2.1
V/µs
Peak-to-Peak Input-Noise
Voltage
e
n
P-P
f = 0.1Hz to 10Hz
760
nV
P-P
f = 10Hz
27
f = 1kHz
8.9
Input Voltage-Noise Density e
n
f = 30kHz
7.9
nV/√Hz
Input Current-Noise Density i
n
f = 1kHz
0.5
fA/√Hz
SYMBOL
0.001
VDD - V
VOL - V
VDD - V
VOL - V
OH
SS
OH
SS
0.2 X V
0.8 X V
DD
MAX
D D
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= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS MIN TYP
MAX
UNITS
f = 1kHz
MAX4250–MAX4254
A
V
= 1V/V, V
OUT
= 2V
P-P
,
R
L
= 1kΩ to GND
(Note 7)
f = 20kHz
f = 1kHz
Total Harmonic Distortion Plus
Noise
MAX4249/MAX4255/
MAX4256/MAX4257
A
V
= 1V/V, V
OUT
= 2V
P-P
,
f = 20kHz
%
Capacitive-Load Stability
No sustained oscillations
400 pF
MAX4250–MAX4254, AV = 1V/V 10
Gain Margin GM
MAX4249/MAX4255/MAX4256/MAX4257,
A
V
= 10V/V
12.5
dB
MAX4250–MAX4254, AV = 1V/V 74
Phase Margin ΦM
MAX4249/MAX4255/MAX4256/MAX4257,
A
V
= 10V/V
68
Degrees
MAX4250–MAX4254 6.7
Settling Time
To 0.01%,
V
OUT
= 2V step
MAX4249/MAX4255/
MAX4256/MAX4257
1.6
µs
MAX4251/MAX4253 0.8
Delay Time to Shutdown t
SH
I
VDD = 5% of
normal
operation
MAX4249/MAX4256 1.2
µs
MAX4251/MAX4253 8
Delay Time to Enable t
EN
V
OUT = 2.5V,
V
OUT settles to
0.1%
MAX4249/MAX4256 3.5
µs
Power-Up Delay Time t
PU
V
DD = 0 to 5V step, VOUT stable to 0.1%
6µs
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.
THD+N
0.0004
0.006
0.0012
RL = 1kΩ to GND (Note 7)
0.007
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
_______________________________________________________________________________________ 5
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
MAX4249-57 TOC01
VOS (μV)
NUMBER OF UNITS
400 UNITS
V
CM
= 0
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
MAX4249-57 TOC02
TEMPERATURE (°C)
VCM = 0
V
OS
(μV)
-50
0
100
50
150
200
-0.5 1.50.5 2.5 3.5 4.5
MAX4249-57 TOC03
INPUT COMMON-MODE VOLTAGE (V)
INPUT OFFSET VOLTAGE (μV)
VDD = 3V VDD = 5V
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
0
0.3
0.2
0.1
0.4
0.5
0.6
04312 5678910
OUTPUT VOLTAGE
vs. OUTPUT LOAD CURRENT
MAX4249-57 TOC04
OUTPUT LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
VDD = 3V OR 5V
V
DIFF
= ±10mV
VDD - V
OH
V
OL
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
MAX4249-57 TOC05
TEMPERATURE (°C)
RL = 1kΩ
RL = 10kΩ
RL = 100kΩ
V
DD
- V
OH
(V)
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 -57TOC06
TEMPERATURE (°C)
V
OL
(V)
RL = 10kΩ
R
L
= 1kΩ
R
L
= 100kΩ
50
70
60
100
90
80
130
120
110
140
0 10050 150 200 250
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
MAX4249-57 TOC07
V
OUT
SWING FROM EITHER SUPPLY (mV)
VDD = 3V
R
L
REFERENCED TO GND
RL = 2kΩ
R
L
= 20kΩ
R
L
= 200kΩ
A
V
(dB)
60
70
80
90
100
110
120
130
140
0 50 100 150 200 250
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
MAX4249-57 TOC08
V
OUT
SWING FROM EITHER SUPPLY (mV)
VDD = 3V
R
L
REFERENCED TO GND
R
L
= 2kΩ
R
L
= 20kΩ
R
L
= 200kΩ
A
V
(dB)
50
70
60
100
90
80
130
120
110
140
0 10050 150 200 250
MAX4249-57 TOC09
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
V
OUT
SWING FROM EITHER SUPPLY (mV)
VDD = 5V
R
L
REFERENCED TO GND
R
L
= 2kΩ
R
L
= 20kΩ
R
L
= 200kΩ
A
V
(dB)
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.)
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
6 _______________________________________________________________________________________
50
80
70
60
90
100
110
120
130
140
150
0 10050 150 200 250
MAX4249-57 TOC10
VDD = 5V
R
L
REFERENCED TO GND
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
V
OUT
SWING FROM EITHER SUPPLY (mV)
RL = 2kΩ
R
L
= 20kΩ
R
L
= 200kΩ
A
V
(dB)
100
110
105
115
120
125
-40 0-20 20 6040 80
LARGE-SIGNAL VOLTAGE GAIN
vs. TEMPERATURE
MAX4249-57 TOC11
TEMPERATURE (°C)
RL REFERENCED TO VDD/2
V
DD
= 5V
A
V
(dB)
RL = 1kΩ
V
OUT
= 150mV
TO 4.75mV
R
L
= 100kΩ
V
OUT
= 10mV
TO 4.99mV
R
L
= 10kΩ
V
OUT
= 20mV
TO 4.975mV
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
MAX4249-57 TOC12
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (μA)
PER AMPLIFIER
SHDN = V
DD
SUPPLY CURRENT (μA)
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
MAX4249-57 TOC13
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
SHUTDOWN SUPPLY CURRENT (μA)
PER AMPLIFIER
SHDN = V
DD
SHDN = V
SS
2000
100
0.001 0.1 10.01 5
SUPPLY CURRENT
vs. OUTPUT VOLTAGE
MAX4249-57 TOC14
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
MAX4249-57 TOC15
SUPPLY VOLTAGE (V)
V
OS
(μV)
V
CM
= 0
V
OUT
= VDD/2
RL REFERENCED TO GND
R
L
= 10kΩ
R
L
= 1kΩ
R
L
= 100kΩ
60
-40
100 10k 100k 1M1k 10M
MAX4250–MAX4254
GAIN AND PHASE vs. FREQUENCY
-20
-10
0
-30
MAX4249-57 TOC16
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
60
-40
100 10k 100k 1M1k 10M
MAX4249/MAX4255/MAX4256/MAX4257
GAIN AND PHASE vs. FREQUENCY
-20
-10
0
-30
MAX4249-57 TOC17
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
0
-100
-110
1 1k 10k 100k 1M10 100 10M
MAX4250–MAX4254
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-80
-70
-60
-90
MAX4249-57 TOC18
FREQUENCY (Hz)
PSRR (dB)
-50
-40
-30
-20
-10
PSRR+
PSRR-
VDD = 3V, 5V
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.)
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