19-1295; Rev 7; 4/05
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
General Description
The MAX4249–MAX4257 low-noise, low-distortion oper-
ational amplifiers offer rail-to-rail outputs and single-
supply 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 shut-
down 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 with a gain-bandwidth product of 3MHz.
The MAX4249/MAX4255/MAX4256/MAX4257 are inter-
nally 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 chip-
scale 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.
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 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
MAX4249–MAX4257
Ordering Information
PART
MAX4249ESD
MAX4249EUB
MAX4250EUK-T
MAX4250AAUK-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +125°C
PIN-
PACKAGE
14 SO
10 µMAX
5 SOT23-5
5 SOT23-5
TOP
MARK
—
—
ACCI
AEYJ
Applications
Wireless Communications Devices
PA Control
Portable/Battery-Powered Equipment
Medical Instrumentation
ADC Buffers
Digital Scales/Strain Gauges
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
A
1
OUTA
2
V
DD
3
A1
OUTB
OUTB
B1
B
INA-
A2
INB-
A3
INB+
A4
SHDNB
B4
MAX4252
INB-
V
DD
C1
C2
MAX4253
C3
INA+
V
SS
C4
SHDNA
C
INA+
V
SS
INB+
OUTA
INA-
UCSP
UCSP
Pin Configurations continued at end of data sheet.
UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________
Maxim Integrated Products
1
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.
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
MAX4249–MAX4257
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (V
DD
to V
SS
) ......................+6.0V to -0.3V
Analog Input Voltage (IN_+, IN_-)....(V
DD
+ 0.3V) to (V
SS
- 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
Note 1:
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
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 rec-
ommended 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.
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.
ELECTRICAL CHARACTERISTICS
(V
DD
= 5V, V
SS
= 0, V
CM
= 0, V
OUT
= V
DD
/2, R
L
tied to V
DD
/2,
SHDN
= V
DD
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
Supply Voltage Range
SYMBOL
V
DD
(Note 4)
V
DD
= 3V
Quiescent Supply Current Per
Amplifier
Normal
mode
E temperature
V
DD
= 5V
MAX4250AAUK
420
0.5
±0.07
0.3
(Note 6)
(Note 6)
E temperature
MAX4250AAUK
E temperature
MAX4250AAUK
1000
Guaranteed by
CMRR test
V
SS
- 0.2V
≤
V
CM
≤
V
DD
- 1.1V
V
DD
= 2.4V to 5.5V
E temperature
MAX4250AAUK
E temperature
MAX4250AAUK
E temperature
MAX4250AAUK
-0.2
0
70
68
75
72
100
115
V
DD
-1.1
V
DD
-1.1
±1
±1
±100
±10
±100
±10
CONDITIONS
MIN
2.4
400
420
575
675
655
1.5
±0.75
±1.85
mV
µV/°C
pA
nA
pA
nA
GΩ
V
dB
µA
TYP
MAX
5.5
UNITS
V
I
Q
V
DD
= 5V, UCSP only
Shutdown mode (SHDN = V
SS
) (Note 2)
Input Offset Voltage (Note 5)
Input Offset Voltage Tempco
Input Bias Current
Input Offset Current
Differential Input Resistance
Input Common-Mode Voltage
Range
Common-Mode Rejection Ratio
V
OS
TCV
OS
I
B
I
OS
R
IN
V
CM
CMRR
E temperature
MAX4250AAUK
Power-Supply Rejection Ratio
PSRR
dB
2
_______________________________________________________________________________________
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V, V
SS
= 0, V
CM
= 0, V
OUT
= V
DD
/2, R
L
tied to V
DD
/2,
SHDN
= V
DD
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
R
L
= 10kΩ to V
DD
/2;
V
OUT
= 25mV to V
DD
- 4.97V
R
L
= 1kΩ to V
DD
/2;
V
OUT
= 150V to V
DD
-
4.75V
|V
IN+
- V
IN-
|
≥
10mV;
R
L
= 10kΩ to V
DD
/2
E temperature
MAX4250AAUK
E temperature
MAX4250AAUK
V
DD
- V
OH
V
OL
- V
SS
V
DD
- V
OH
V
OL
- V
SS
Output Short-Circuit Current
Output Leakage Current
SHDN
Logic Low
SHDN
Logic High
SHDN
Input Current
Input Capacitance
Gain-Bandwidth Product
GBW
MAX4250–MAX4254
MAX4249/MAX4255/MAX4256/MAX4257
Slew Rate
Peak-to-Peak Input-Noise
Voltage
SR
MAX4250–MAX4254
MAX4249/MAX4255/MAX4256/MAX4257
e
nP-P
f = 0.1Hz to 10Hz
f = 10Hz
Input Voltage-Noise Density
e
n
i
n
f = 1kHz
f = 30kHz
Input Current-Noise Density
f = 1kHz
I
SC
I
LEAK
V
IL
V
IH
I
IL
/I
IH
Shutdown mode (SHDN = V
SS
),
V
OUT
= V
SS
to V
DD
(Note 2)
(Note 2)
(Note 2)
SHDN
= V
SS
= V
DD
(Note 2)
0.8
X
V
DD
0.5
11
3
MHz
22
0.3
V/µs
2.1
760
27
8.9
7.9
0.5
fA/√Hz
nV/√Hz
nV
P-P
1.5
E
A
E
A
E
A
E
A
68
0.001
1.0
0.2
X
V
DD
47
77
MIN
80
77
80
77
8
7
25
30
20
25
200
225
100
125
mA
µA
V
V
µA
pF
mV
112
TYP
116
dB
MAX
UNITS
MAX4249–MAX4257
Large-Signal Voltage Gain
A
V
Output Voltage Swing
V
OUT
mV
Output Voltage Swing
V
OUT
|V
IN+
- V
IN-
|
≥
10mV,
R
L
= 1kΩ to V
DD
/2
_______________________________________________________________________________________
3
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
MAX4249–MAX4257
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V, V
SS
= 0, V
CM
= 0, V
OUT
= V
DD
/2, R
L
tied to V
DD
/2,
SHDN
= V
DD
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MAX4250–MAX4254
A
V
= 1V/V, V
OUT
= 2V
P-P
,
R
L
= 1kΩ to GND
(Note 7)
THD+N
MAX4249/MAX4255/
MAX4256/MAX4257
A
V
= 1V/V, V
OUT
= 2V
P-P
,
R
L
= 1kΩ to GND (Note 7)
No sustained oscillations
MAX4250–MAX4254, A
V
= 1V/V
Gain Margin
GM
MAX4249/MAX4255/MAX4256/MAX4257,
A
V
= 10V/V
MAX4250–MAX4254, A
V
= 1V/V
Phase Margin
ΦM
MAX4249/MAX4255/MAX4256/MAX4257,
A
V
= 10V/V
MAX4250–MAX4254
Settling Time
To 0.01%, V
OUT
= 2V step
I
VDD
= 5% of
normal
operation
V
OUT
= 2.5V,
V
OUT
settles to
0.1%
MAX4249/MAX4255/
MAX4256/MAX4257
MAX4251/MAX4253
MAX4249/MAX4256
MAX4251/MAX4253
MAX4249/MAX4256
f = 1kHz
f = 20kHz
0.0012
0.007
400
10
dB
12.5
74
Degrees
68
6.7
1.6
0.8
µs
1.2
8
µs
3.5
6
µs
µs
pF
f = 1kHz
f = 20kHz
MIN
TYP
0.0004
0.006
%
MAX
UNITS
Total Harmonic Distortion Plus
Noise
Capacitive-Load Stability
Delay Time to Shutdown
t
SH
Delay Time to Enable
Power-Up Delay Time
t
EN
t
PU
V
DD
= 0 to 5V step, V
OUT
stable to 0.1%
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.
4
_______________________________________________________________________________________
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
MAX4249–MAX4257
Typical Operating Characteristics
(V
DD
= 5V, V
SS
= 0, V
CM
= V
OUT
= V
DD
/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
MAX4249-57 TOC01
OFFSET VOLTAGE
vs. TEMPERATURE
MAX4249-57 TOC02
35
30
NUMBER OF UNITS
25
20
15
10
5
100
V
OS (μV)
50
0
-50
-100
-150
-200
-95
-75
-55
-35
-13
7
28
49
69
90
110
131
152
172
192
-250
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (μV)
400 UNITS
V
CM
= 0
T
A
= +25°C
200
150
V
CM
= 0
150
100
V
DD
= 3V
V
DD
= 5V
50
0
0
-50
-0.5
0.5
1.5
2.5
3.5
4.5
V
OS
(μV)
INPUT COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE
vs. OUTPUT LOAD CURRENT
MAX4249-57 TOC04
MAX4249-57 TOC05
0.5
OUTPUT VOLTAGE (V)
0.4
0.3
0.2
0.1
0
0
V
DD
= 3V OR 5V
V
DIFF
=
±10mV
V
DD
- V
OH
0.09
0.08
V
DD
- V
OH
(V)
0.07
R
L
= 1kΩ
0.05
0.04
V
OL
(V)
0.03
0.02
R
L
= 1kΩ
0.06
0.05
0.04
0.03
0.02
0.01
0
R
L
= 10kΩ
R
L
= 100kΩ
V
OL
0.01
0
R
L
= 10kΩ
R
L
= 100kΩ
1
2
3
4
5
6
7
8
9
10
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
OUTPUT LOAD CURRENT (mA)
TEMPERATURE (°C)
TEMPERATURE (°C)
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
MAX4249-57 TOC07
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
MAX4249-57 TOC08
130
120
AV (dB)
R
L
= 200kΩ
R
L
= 20kΩ
R
L
= 2kΩ
130
120
AV (dB)
130
120
AV (dB)
R
L
= 200kΩ
110
100
90
80
70
60
50
0
50
100
150
110
100
90
80
R
L
= 20kΩ
R
L
= 200kΩ
110
100
90
R
L
= 20kΩ
R
L
= 2kΩ
R
L
= 2kΩ
80
70
V
DD
= 3V
R
L
REFERENCED TO GND
70
60
0
V
DD
= 3V
R
L
REFERENCED TO GND
60
50
0
50
100
V
DD
= 5V
R
L
REFERENCED TO GND
200
250
V
OUT
SWING FROM EITHER SUPPLY (mV)
50
100
150
200
250
V
OUT
SWING FROM EITHER SUPPLY (mV)
150
200
250
V
OUT
SWING FROM EITHER SUPPLY (mV)
_______________________________________________________________________________________
MAX4249-57 TOC09
140
140
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
140
MAX4249 -57TOC06
0.6
0.10
OUTPUT VOLTAGE SWING (V
OH
)
vs. TEMPERATURE
0.06
OUTPUT VOLTAGE SWING (V
OL
)
vs. TEMPERATURE
MAX4249-57 TOC03
40
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
200
250
5
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