MAX4250AAUK-T [MAXIM]
Operational Amplifier, 1 Func, 1850uV Offset-Max, BICMOS, PDSO5, MO-178AA, SOT-23, 5 PIN;
| 型号： | MAX4250AAUK-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Operational Amplifier, 1 Func, 1850uV Offset-Max, BICMOS, PDSO5, MO-178AA, SOT-23, 5 PIN 放大器 信息通信管理 光电二极管 |
| 文件： | 总16页 (文件大小：730K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
General Description
Features
o Available in Space-Saving UCSP, SOT23, and
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.
µMAX® Packages
o Low Distortion: 0.0002% THD (1k" load)
o 400µA Quiescent Supply Current per Amplifier
o Single-Supply Operation from 2.4V to 5.5V
o Input Common-Mode Voltage Range Includes
Ground
o Outputs Swing Within 8mV of Rails with a 10k"
Load
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.
o 3MHz GBW Product, Unity-Gain Stable
(MAX4250–MAX4254)
22MHz GBW Product, Stable with A # 10V/V
V
(MAX4249/MAX4255/MAX4256/MAX4257)
o Excellent DC Characteristics
V
= 70µV
OS
I
= 1pA
BIAS
Large-Signal Voltage Gain = 116dB
o Low-Power Shutdown Mode
Reduces Supply Current to 0.5µA
Places Outputs in a High-Impedance State
o 400pF Capacitive-Load Handling Capability
Ordering Information
PIN-
PACKAGE
TOP
MARK
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
14 SO
—
MAX4249ESD+
MAX4249EUB+
MAX4250EUK+T
MAX4250AAUK+T
Applications
Wireless Communications Devices
PA Control
10 µMAX
5 SOT23
—
ACCI
AEYJ
-40°C to +125°C 5 SOT23
Portable/Battery-Powered Equipment
Medical Instrumentation
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
ADC Buffers
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Digital Scales/Strain Gauges
Pin/Bump Configurations
TOP VIEW
(BUMPS ON BOTTOM)
1
2
3
A4
A2
A3
A1
V
INB-
INB+
SHDNB
OUTB
OUTA
DD
OUTB
A
B
C
B4
B1
V
INA-
INA+
V
MAX4253
SS
INB-
INB+
DD
MAX4252
C4
C2
C3
C1
V
SS
INA-
INA+
OUTA
SHDNA
UCSP
UCSP
Pin/Bump Configurations continued at end of data sheet.
UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-1295; Rev 9; 12/12
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (V
Analog Input Voltage (IN_+, IN_-)....(V
SHDN Input Voltage ......................................6.0V to (V - 0.3V)
Output Short-Circuit Duration to Either Supply ..........Continuous
to V )......................+6.0V to -0.3V
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
Soldering Temperature (reflow) .......................................+260°C
DD
SS
+ 0.3V) to (V - 0.3V)
DD
SS
SS
Continuous Power Dissipation (T = +70°C)
A
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
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 = 0V, V
= 0V, V
= V /2, R connected to V /2, SHDN = V , T = T
to T
, unless otherwise noted.
MAX
MIN
SS
CM
OUT
DD
L
DD
DD
A
Typical values are at T = +25°C.) (Notes 2, 3)
A
PARAMETER
SYMBOL
V
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range
(Note 4)
2.4
5.5
V
DD
V
V
V
= 3V
400
420
DD
DD
DD
E temperature
575
675
655
1.5
Normal
mode
= 5V
Quiescent Supply Current Per
Amplifier
MAX4250AAUK
I
Q
µA
= 5V, UCSP only
420
Shutdown mode (SHDN = V ) (Note 2)
0.5
SS
E temperature
0.07
0.75
1.85
Input Offset Voltage (Note 5)
Input Offset Voltage Tempco
V
mV
OS
MAX4250AAUK
TCV
0.3
0.1
µV/°C
OS
T
T
T
T
T
T
= +25°C
1
50
A
A
A
A
A
A
Input Bias Current
I
(Note 6)
(Note 6)
= -40°C to +85°C
= -40°C to +125°C
= +25°C
pA
pA
B
1500
1
0.1
1000
115
Input Offset Current
I
OS
= -40°C to +85°C
= -40°C to +125°C
10
100
Differential Input Resistance
R
GΩ
IN
E temperature
-0.2
0
V
-1.1
DD
Input Common-Mode Voltage
Range
Guaranteed by
CMRR test
V
V
CM
MAX4250AAUK
E temperature
MAX4250AAUK
V
-1.1
DD
70
68
V
V
- 0.2V ≤ V
- 1.1V
≤
CM
SS
Common-Mode Rejection Ratio
CMRR
dB
DD
2
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V, V = 0V, V
= 0V, V
= V /2, R connected to V /2, SHDN = V , T = T
to T
, unless otherwise noted.
MAX
MIN
SS
CM
OUT
DD
L
DD
DD
A
Typical values are at T = +25°C.) (Notes 2, 3)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
E temperature
75
72
100
Power-Supply Rejection Ratio
PSRR
V
– 2.4V to 5.5V
dB
DD
MAX4250AAUK
E temperature
R = 10kΩ to V /2;
V
– 4.97V
L
DD
80
77
80
77
116
= 25mV to V
OUT
DD
MAX4250AAUK
E temperature
Large-Signal Voltage Gain
A
dB
V
R = 1kΩ to V /2;
V
– 4.75V
L
DD
112
= 150V to V
OUT
DD
MAX4250AAUK
E
8
7
25
30
20
V
- V
DD
OH
A
E
|V
- V | ≥ 10mV;
IN-
IN+
Output Voltage Swing
Output Voltage Swing
V
V
mV
mV
OUT
OUT
R = 10kΩ to V /2
L
DD
V
- V
SS
OL
A
E
25
77
47
200
V
V
- V
DD
OL
OH
|V
- V | ≥ 10mV,
A
E
A
225
100
125
IN+
IN-
R = 1kΩ to V /2
L
DD
- V
SS
Output Short-Circuit Current
Output Leakage Current
I
68
mA
µA
SC
Shutdown mode (SHDN = V ),
SS
I
0.001
1.0
LEAK
V
= V to V (Note 2)
SS DD
OUT
SHDN Logic Low
SHDN Logic High
SHDN Input Current
Input Capacitance
V
(Note 2)
(Note 2)
0.2
X
V
V
V
IL
DD
V
0.8 X V
DD
IH
I /I
IL IH
SHDN = V = V (Note 2)
DD
0.5
11
3
1.5
µA
pF
SS
MAX4250–MAX4254
Gain-Bandwidth Product
Slew Rate
GBW
SR
MHz
V/µs
22
0.3
2.1
MAX4249/MAX4255/MAX4256/MAX4257
MAX4250–MAX4254
MAX4249/MAX4255/MAX4256/MAX4257
Peak-to-Peak Input-Noise
Voltage
e
760
nV
P-P
n
P-P
f = 0.1Hz to 10Hz
27
8.9
7.9
0.5
f = 10Hz
f = 1kHz
f = 30kHz
f = 1kHz
Input Voltage-Noise Density
Input Current-Noise Density
e
nV/√Hz
fA/√Hz
n
i
n
Maxim Integrated
3
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V, V = 0V, V
= 0V, V
= V /2, R connected to V /2, SHDN = V , T = T
to T
, unless otherwise noted.
MAX
MIN
SS
CM
OUT
DD
L
DD
DD
A
Typical values are at T = +25°C.) (Notes 2, 3)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX4250–MAX4254
A = 1V/V, V = 2V
0.0004
0.006
f = 1kHz
,
V
OUT
P-P
R = 1kΩ to GND
L
f = 20kHz
f = 1kHz
f = 20kHz
(Note 7)
Total Harmonic Distortion Plus
Noise
THD+N
%
MAX4249/MAX4255/
MAX4256/MAX4257
0.0012
0.007
A = 1V/V, V
V
= 2V
OUT
,
P-P
R = 1kΩ to GND (Note 7)
L
Capacitive-Load Stability
Gain Margin
400
10
pF
dB
No sustained oscillations
MAX4250–MAX4254, A = 1V/V
V
GM
MAX4249/MAX4255/MAX4256/MAX4257,
A = 10V/V
V
12.5
74
MAX4250–MAX4254, A = 1V/V
V
Phase Margin
ΦM
Degrees
MAX4249/MAX4255/MAX4256/MAX4257,
A = 10V/V
V
68
6.7
1.6
MAX4250–MAX4254
V
To 0.01%, OUT
= 2V step
Settling Time
µs
µs
MAX4249/MAX4255/
MAX4256/MAX4257
I
MAX4251/MAX4253
MAX4249/MAX4256
0.8
1.2
VDD = 5% of
Delay Time to Shutdown
t
SH
normal
operation
V
V
0.1%
OUT = 2.5V,
OUT settles to
MAX4251/MAX4253
MAX4249/MAX4256
8
Delay Time to Enable
Power-Up Delay Time
t
t
µs
µs
EN
3.5
6
V
V
PU
DD = 0 to 5V step, 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 = +25°C. Limits over temperature are guaranteed by design.
A
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
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics
(V
= 5V, V
= 0V, V
= V
= V /2, input noise floor of test equipment =10nV/!Hz for all distortion measurements,
OUT DD
DD
SS
CM
T
A
= +25°C, unless otherwise noted.)
MAX4251/MAX4256
INPUT OFFSET VOLTAGE DISTRIBUTION
OFFSET VOLTAGE
vs. TEMPERATURE
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
40
250
200
150
100
50
200
150
100
50
400 UNITS
V
CM
= 0
V
= 0
35
30
25
20
15
10
5
CM
T = +25°C
A
0
V
DD
= 3V
V
DD
= 5V
-50
-100
-150
-200
-250
0
0
-50
-40
-20
0
20
40
60
80
-0.5
0.5
1.5
2.5
3.5
4.5
V
OS
(µV)
TEMPERATURE (°C)
INPUT COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE SWING (V
)
OL
OUTPUT VOLTAGE
vs. OUTPUT LOAD CURRENT
OUTPUT VOLTAGE SWING (V
vs. TEMPERATURE
)
OH
vs. TEMPERATURE
0.06
0.05
0.04
0.03
0.02
0.01
0
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0.6
0.5
0.4
0.3
0.2
0.1
0
V
V
= 3V OR 5V
DD
= ±10mV
DIFF
R = 1kΩ
R = 1kΩ
L
L
V
- V
OH
DD
V
OL
R = 10kΩ
L
R = 10kΩ
L
R = 100kΩ
L
R = 100kΩ
L
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
0
1
2
3
4
5
6
7
8
9
10
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT LOAD CURRENT (mA)
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
140
130
120
110
100
90
140
140
130
120
110
100
90
R = 200kΩ
L
R = 200kΩ
L
130
120
110
100
90
R = 20kΩ
L
R = 20kΩ
L
R = 200kΩ
L
R = 2kΩ
L
R = 20kΩ
L
R = 2kΩ
L
R = 2kΩ
L
80
80
80
70
70
V
= 5V
V
= 3V
DD
DD
70
60
V
= 3V
60
DD
R REFERENCED TO GND
R REFERENCED TO GND
L
L
R REFERENCED TO GND
L
50
50
60
0
50
100
150
200
250
0
50
100
150
200
250
0
50
100
150
200
250
V
SWING FROM EITHER SUPPLY (mV)
V
SWING FROM EITHER SUPPLY (mV)
OUT
V
SWING FROM EITHER SUPPLY (mV)
OUT
OUT
Maxim Integrated
5
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= 5V, V
= 0V, V
= V
= V /2, input noise floor of test equipment =10nV/!Hz for all distortion measurements,
DD
SS
CM
OUT
DD
T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT AND SHUTDOWN
LARGE-SIGNAL VOLTAGE GAIN
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
SUPPLY CURRENT vs. TEMPERATURE
vs. TEMPERATURE
MAX4249-57 TOC12
125
120
115
110
105
100
460
440
420
400
380
0.376
0.375
150
140
130
120
110
100
90
PER AMPLIFIER
R = 200kΩ
L
R = 20kΩ
L
R REFERENCED TO V /2
L
DD
V
= 5V
DD
R = 2kΩ
L
SHDN = V
R = 100kΩ
DD
L
V
OUT
= 10mV
0.374
0.373
TO 4.99mV
80
SHDN = V
SS
R = 10kΩ
R = 1kΩ
V = 150mV
TO 4.75mV
-20
70
L
L
OUT
360
340
V
OUT
= 20mV
V
= 5V
DD
60
TO 4.975mV
R REFERENCED TO GND
L
50
-40
0
20
40
60
80
-40
-20
0
20
40
60
80
0
50
100
150
200
250
TEMPERATURE (°C)
V
SWING FROM EITHER SUPPLY (mV)
TEMPERATURE (°C)
OUT
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
SUPPLY CURRENT AND SHUTDOWN
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. OUTPUT VOLTAGE
MAX4249-57 TOC13
180
160
140
120
100
80
440
420
400
380
360
340
320
0.6
2000
1000
V
= 0
DD
CM
PER AMPLIFIER
V
= V /2
OUT
R REFERENCED TO GND
L
0.5
0.4
0.3
0.2
0.1
0
SHDN = V
DD
V
= 5V
DD
SHDN = V
SS
R = 10kΩ
L
R = 1kΩ
L
400
V
= 3V
DD
60
R = 100kΩ
L
100
40
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
SUPPLY VOLTAGE (V)
0.001
0.01
0.1
1
5
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.5
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX4250–MAX4254
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4250–MAX4254
MAX4249/MAX4255/MAX4256/MAX4257
GAIN AND PHASE vs. FREQUENCY
GAIN AND PHASE vs. FREQUENCY
MAX4249-57 TOC16
MAX4249-57 TOC17
60
50
40
180
144
108
60
50
180
144
108
0
V
= 3V, 5V
L
L
DD
V
= 3V, 5V
V
= 3V, 5V
DD
DD
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
R = 50kΩ
C = 20pF
A
R = 50kΩ
L
C = 20pF
A = 1000
V
L
40
= 1000
GAIN
V
30
30
20
72
36
72
36
GAIN
20
10
10
0
0
0
PSRR+
-36
0
-36
PHASE
-10
-72
-10
-20
-30
-40
-72
PSRR-
PHASE
-108
-20
-30
-108
-144
-180
-144
-180
-40
1
10 100 1k
10k 100k 1M 10M
100
1k
10k
100k
1M
10M
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
6
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= 5V, V
= 0V, V
= V
= V /2, input noise floor of test equipment =10nV/!Hz for all distortion measurements,
DD
SS
CM
OUT
DD
T
A
= +25°C, unless otherwise noted.)
INPUT VOLTAGE-N0ISE DENSITY
OUTPUT IMPEDANCE
vs. FREQUENCY
0.1Hz TO 10Hz NOISE
P-P
vs. FREQUENCY
30
25
20
1000
V
= 3V OR 5V
A
V
= 10 (MAX4249/MAX4255/
MAX4256/MAX4257)
DD
100
10
200nV/div
15
10
5
1
A = 1 (MAX4250–MAX4254)
V
V
= 760nV
P-P
P-PNOISE
0
0.1
1s/div
10
100
1k
10k
100k
1k
10k
100k
FREQUENCY (Hz)
1M
10M
FREQUENCY (Hz)
MAX4250–MAX4254
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE (VDD = 5V)
MAX4250–MAX4254
FFT OF DISTORTION AND NOISE
MAX4249/MAX4255/MAX4256/MAX4257
FFT OF DISTORTION AND NOISE
20
0
0
-20
10
V
OUT
= 4V
P-P
V
= 2V
A = 10
V
R = 1kΩ
L
OUT
P-P
V
IN
f
O
= 1kHz
f
O
= 3kHz
f
O
= 1kHz
V
R
O
FILTER BW = 30kHz
A
= 1
V
V
-20
-40
-60
-80
-100
-120
-140
IN
-40
1
L
V
O
100kΩ
11kΩ
-60
10kΩ
f
O
f
O
100kΩ
11kΩ
-80
0.1
R = 1kΩ
L
-100
-120
-140
-160
HD2
HD2
HD4
0.01
0.001
HD3
HD5
HD3
R = 10kΩ
L
R = 100kΩ
L
15k
10k
FREQUENCY (Hz)
10
5k
20k
15k
FREQUENCY (Hz)
10
5k
10k
20k
0
1
2
3
4
5
OUTPUT VOLTAGE (V
)
P-P
MAX4249/MAX4255/MAX4256/MAX4257
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE SWING
MAX4250–MAX4254
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE SWING (VDD = 3V)
MAX4250–MAX4254
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
10
1
1
V
IN
V
V
A
= 10
V
IN
IN
V
R
V
OUT
V
R
OUT
OUT
R
L
L
L
1
0.1
R2
100kΩ
11kΩ
R1
100kΩ
11kΩ
0.1
0.01
A
= 100
= 10
V
R1 = 560Ω, R2 = 53kΩ
0.1
R = 1kΩ
L
0.01
f
O
= 20kHz, FILTER BW = 80kHz
A
V
R1 = 5.6kΩ, R2 = 53kΩ
R = 10kΩ
L
0.01
0.001
0.001
A = 10
FILTER BW = 22kHz
R = 10kΩ TO GND
V
R = 100kΩ
L
A
V
= 1
f
= 3kHz
O
L
f
O
= 3kHz, FILTER BW = 30kHz
FILTER BW = 30kHz
V
= 2V
O
P-P
0.001
0.0001
0
1
2
3
0
1
2
3
4
5
10
100
1k
10k
OUTPUT VOLTAGE (V
)
OUTPUT VOLTAGE (V
)
P-P
P-P
FREQUENCY (Hz)
Maxim Integrated
7
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= 5V, V
= 0V, V
= V
= V /2, input noise floor of test equipment =10nV/!Hz for all distortion measurements,
OUT DD
DD
SS
CM
T
A
= +25°C, unless otherwise noted.)
MAX4250–MAX4254
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX4250–MAX4254
LARGE-SIGNAL PULSE RESPONSE
MAX4250–MAX4254
SMALL-SIGNAL PULSE RESPONSE
0.1
FILTER BW = 80kHz
A
= 1
V
1.5V
0.6V
R = 1kΩ
L
V
OUT
= 2V
P-P
0.01
V
OUT
R TO V /2
L
DD
20mV/div
V
OUT
200mV/div
R TO GND
L
0.001
V
= 3V
DD
V
= 3V
0.5V
DD
0.5V
R TO V
L
DD
R = 10kΩ
C = 100pF
V
L
R = 10kΩ
C = 100pF
V
L
L
L
= 1V PULSE
IN
= 100V PULSE
IN
0.0001
2µs/div
2µs/div
10
100
1k
10k
FREQUENCY (Hz)
MAX4249/MAX4255/MAX4256/MAX4257
LARGE-SIGNAL PULSE RESPONSE
MAX4249/MAX4255/MAX4256/MAX4257
SMALL-SIGNAL PULSE RESPONSE
CHANNEL SEPARATION vs. FREQUENCY
140
130
120
110
100
2V
1.6V
V
OUT
200mV/div
V
OUT
50mV/div
1.5V
90
80
70
0
V
= 3V
DD
V
= 3V
DD
R = 10kΩ
C = 100pF
V
A
L
R = 10kΩ
L
1V
L
C = 100pF
L
= 100mV PULSE
= 10
IN
V
V
IN
A
V
= 10mV PULSE
= 10
2µs/div
2µs/div
1k
10k
100k
1M
10M
FREQUENCY (Hz)
8
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Pin/Bump Description
PIN/BUMP
MAX4250/ MAX4251/ MAX4252/
MAX4249/
MAX4253
MAX4252
MAX4254
NAME
FUNCTION
MAX4255
MAX4256
MAX4257
5-PIN
SOT23
8-PIN
8-PIN
8-BUMP 10-BUMP 10-PIN
14-PIN
SO
14-PIN
SO
SO/µMAX SO/µMAX
UCSP
UCSP
µMAX
OUT, OUTA,
OUTB,
1, 7, 8,
14
1
6
1, 7
A1, A3
A1, C1
1, 9
1, 13
Amplifier Output
OUTC,
OUTD
Negative Supply.
Connect to
V
2
3
4
3
4
C2
B4
4
4
11
SS
ground for single-
supply operation
IN+, INA+,
INB+, INC+,
IND+
3, 5, 10,
12
Noninverting
Amplifier Input
3, 5
C1, C3
A3, C3
3, 7
3, 11
IN-, INA-,
INB-,
2, 6, 9,
13
Inverting
4
5
2
7
2, 6
8
B1, B3
A2
A2, C2
B1
2, 8
10
2, 12
14
Amplifier Input
INC-, IND-
V
4
Positive Supply
DD
Shutdown Input,
Connect to V
or leave
unconnected for
normal operation
(amplifier(s)
DD
SHDN,
SHDNA,
SHDNB
—
8
—
—
A4, C4
5, 6
6, 9
—
enabled).
No Connection.
Not internally
connected.
5, 7,
—
—
1, 5
—
—
—
—
—
—
—
—
—
N.C.
—
8, 10
Not populated
with solder
sphere
B2
B2, B3
—
cy, and can drive capacitive loads up to 400pF without
oscillation. The input common-mode voltage range
Detailed Description
The MAX4249–MAX4257 single-supply operational
amplifiers feature ultra-low noise and distortion while
consuming very little power. Their low distortion and low
noise make them ideal for use as preamplifiers in wide
dynamic-range applications, such as 16-bit analog-to-
digital converters (see Typical Operating Circuit). Their
high-input impedance and low noise are also useful for
signal conditioning of high-impedance sources, such
as piezoelectric transducers.
extends from V
- 1.1V to 200mV beyond the negative
DD
rail. The push-pull output stage maintains excellent DC
characteristics, while delivering up to 5mA of current.
The MAX4250–4254 are unity-gain stable, whereas, the
MAX4249/MAX4255/MAX4256/MAX4257 have a higher
slew rate and are stable for gains # 10V/V. The
MAX4249/MAX4251/MAX4253/MAX4256 feature a low-
power shutdown mode, which reduces the supply cur-
rent to 0.5µA and disables the outputs.
These devices have true rail-to-rail output operation,
drive loads as low as 1k" while maintaining DC accura-
The MAX4250AAUK is specified for operation over the
automotive (-40°C to +125°C) temperature range.
Maxim Integrated
9
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Low Distortion
Many factors can affect the noise and distortion that the
device contributes to the input signal. The following
guidelines offer valuable information on the impact of
C
Z
design choices on Total Harmonic Distortion (THD).
R
F
Choosing proper feedback and gain resistor values for
a particular application can be a very important factor
R
G
in reducing THD. In general, the smaller the closed-
loop gain, the smaller the THD generated, especially
when driving heavy resistive loads. Large-value feed-
back resistors can significantly improve distortion. The
THD of the part normally increases at approximately
20dB per decade, as a function of frequency.
Operating the device near or above the full-power
bandwidth significantly degrades distortion.
V
OUT
V
IN
Figure 1. Adding Feed-Forward Compensation
Referencing the load to either supply also improves the
part’s distortion performance, because only one of the
MOSFETs of the push-pull output stage drives the out-
put. Referencing the load to midsupply increases the
part’s distortion for a given load and feedback setting.
(See the Total Harmonic Distortion vs. Frequency graph
in the Typical Operating Characteristics.)
A = 2V/V
V
F
R = R = 10kΩ
G
V
=
IN
100mV
0
50mV/div
For gains # 10V/V, the decompensated devices
MAX4249/MAX4255/MAX4256/MAX4257 deliver the
best distortion performance, since they have a higher
slew rate and provide a higher amount of loop gain for
a given closed-loop gain setting. Capacitive loads
below 400pF, do not significantly affect distortion
results. Distortion performance remains relatively con-
stant over supply voltages.
V
OUT
=
100mV/div
2µs/div
Low Noise
The amplifier’s input-referred, noise-voltage density is
dominated by flicker noise at lower frequencies, and by
thermal noise at higher frequencies. Because the ther-
mal noise contribution is affected by the parallel combi-
Figure 2a. Pulse Response with No Feed-Forward
Compensation
nation of the feedback resistive network (R || R ,
F
G
A = 2
V
Figure 1), these resistors should be reduced in cases
where the system bandwidth is large and thermal noise
is dominant. This noise contribution factor decreases,
however, with increasing gain settings.
R = R = 100kΩ
C = 11pF
Z
F
G
100mV
50mV/div
V
IN
0
For example, the input noise-voltage density of the cir-
cuit with R = 100k", R = 11k" (A = 10V/V) is e =
F
G
V
n
15nV/!Hz, e can be reduced to 9nV/!Hz by choosing
n
100mV/div
R
F
= 10k", R = 1.1k" (A = 10V/V), at the expense
G V
V
OUT
of greater current consumption and potentially higher
distortion. For a gain of 100V/V with R = 100k", R
=
G
F
1.1k", the e is low (9nV/!Hz).
n
2µs/div
Figure 2b. Pulse Response with 10pF Feed-Forward
Compensation
10
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Using a Feed-Forward Compensation
Capacitor, C
Z
The amplifier’s input capacitance is 11pF. If the resis-
tance seen by the inverting input is large (feedback
network), this can introduce a pole within the amplifier’s
bandwidth, resulting in reduced phase margin.
Compensate the reduced phase margin by introducing
R
ISO
V
OUT
a feed-forward capacitor (C ) between the inverting
Z
C
L
input and the output (Figure 1). This effectively cancels
the pole from the inverting input of the amplifier.
MAX4250
MAX4251
MAX4252
MAX4253
MAX4254
V
IN
Choose the value of C as follows:
Z
C = 11 x (R / R ) [pF]
Z
F
G
In the unity-gain stable MAX4250–MAX4254, the use of
a proper C is most important for A = 2V/V, and
V
Z
V
Figure 3. Overdriven Input Showing No Phase Reversal
A
= -1V/V. In the decompensated MAX4249/
MAX4255/MAX4256/MAX4257, C is most important
Z
for A = 10V/V. Figures 2a and 2b show transient
V
response both with and without C .
Z
Using a slightly smaller C than suggested by the for-
Z
4.25V
mula above achieves a higher bandwidth at the
expense of reduced phase and gain margin. As a gen-
V
OUT
eral guideline, consider using C for cases where R ||
Z
G
0
R
is greater than 20k" (MAX4250–MAX4254) or
greater than 5k" (MAX4249/MAX4255/MAX4256/
F
4.45V
MAX4257).
V
IN
Applications Information
-200mV
0
A = 1
V
The MAX4249–MAX4257 combine good driving capa-
bility with ground-sensing input and rail-to-rail output
operation. With their low distortion, low noise, and low-
power consumption, these devices are ideal for use in
portable instrumentation systems and other low-power,
noise-sensitive applications.
V
R
= 5V
= 10kΩ
DD
L
20µs/div
Figure 4. Rail-to-Rail Output Operation
Ground-Sensing and Rail-to-Rail Outputs
The common-mode input range of these devices
extends below ground, and offers excellent common-
mode rejection. These devices are guaranteed not to
undergo phase reversal when the input is overdriven
(Figure 3).
5V
V
OUT
1V/div
Figure 4 showcases the true rail-to-rail output opera-
tion of the amplifier, configured with A = 10V/V. The
V
output swings to within 8mV of the supplies with a
10k" load, making the devices ideal in low-supply-
voltage applications.
0
V
R
= 5V
= 10kΩ
DD
L
A = 10
V
Output Loading and Stability
Even with their low quiescent current of 400µA, these
amplifiers can drive 1k" loads while maintaining excel-
lent DC accuracy. Stability while driving heavy capaci-
tive loads is another key feature.
f = 1kHz
200µs/div
Figure 5. Capacitive-Load Driving Circuit
Maxim Integrated
11
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
160
140
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
DD
= 3V
120
100
80
60
40
20
0
SHADED AREA INDICATES
STABLE OPERATION
WITH NO NEED FOR
SHADED AREA INDICATES
STABLE OPERATION
WITH NO NEED FOR
ISOLATION RESISTOR.
ISOLATION RESISTOR.
10
100
1000
10,000
10
100
1000
10,000
CAPACITIVE LOADING (pF)
CAPACITIVE LOAD (pF)
NOTE: USING AN ISOLATION RESISTOR REDUCES PEAKING.
NOTE: R CHOSEN FOR PEAKING <2dB.
ISO
Figure 8. MAX4250–MAX4254 Unity-Gain Bandwidth vs.
Capacitive Load
Figure 6. Isolation Resistance vs. Capacitive Loading to
Minimize Peaking (<2dB)
These devices maintain stability while driving loads up
to 400pF. To drive higher capacitive loads, place a
small isolation resistor in series between the output of
the amplifier and the capacitive load (Figure 5). This
resistor improves the amplifier’s phase margin by iso-
lating the capacitor from the op amp’s output.
Reference Figure 6 to select a resistance value that will
ensure a load capacitance that limits peaking to <2dB
(25%). For example, if the capacitive load is 1000pF,
the corresponding isolation resistor is 150". Figure 7
shows that peaking occurs without the isolation resis-
tor. Figure 8 shows the unity-gain bandwidth vs. capac-
itive load for the MAX4250–MAX4254.
25
MAX4250–MAX4254 (AV = 1)
MAX4249/MAX4255–MAX4257 (AV = 10)
R
= 0
ISO
20
15
10
5
SHADED AREA INDICATES
STABLE OPERATION
WITH NO NEED FOR
ISOLATION RESISTOR.
0
10
100
1000
10,000
Power Supplies and Layout
The MAX4249–MAX4257 operate from a single 2.4V to
5.5V power supply or from dual supplies of 1.20V to
2.75V. For single-supply operation, bypass the power
supply with a 0.1µF ceramic capacitor placed close to
CAPACITIVE LOAD (pF)
Figure 7. Peaking vs. Capacitive Load
the V
pin. If operating from dual supplies, bypass
DD
each supply to ground.
Good layout improves performance by decreasing the
amount of stray capacitance and noise at the op amp’s
inputs and output. To decrease stray capacitance, min-
imize PC board trace lengths and resistor leads, and
place external components close to the op amp’s pins.
12
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Circuit
5V
V
DD
50kΩ
2
7
MAX195
(16-BIT ADC)
6
DOUT
AIN
MAX4256
3
V
IN
SHDN
SCLK
CS
SERIAL
INTERFACE
8
4
5kΩ
REF
4.096V
V
SS
-5V
SHDN
Selector Guide
GAIN
BANDWIDTH
(MHz)
MINIMUM
STABLE
GAIN (V/V)
NO. OF
SHUTDOWN
MODE
PART
AMPLIFIERS
PER PACKAGE
PIN-PACKAGE
MAX4249
MAX4250/A
MAX4251
MAX4252
22
3
10
1
2
1
1
2
Yes
—
10-pin µMAX, 14-pin SO
5-pin SOT23
3
1
Yes
—
8-pin µMAX/SO
3
1
8-pin µMAX/SO, 8-bump UCSP
10-pin µMAX, 14-pin SO,
10-bump UCSP
MAX4253
3
1
2
Yes
MAX4254
MAX4255
MAX4256
MAX4257
3
1
4
1
1
2
—
—
14-pin SO
22
22
22
10
10
10
5-pin SOT23
8-pin µMAX/SO
8-pin µMAX/SO
Yes
—
Maxim Integrated
13
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Pin/Bump Configurations (continued)
TOP VIEW
+
+
+
N.C.
IN-
1
2
3
4
8
7
6
5
SHDN
OUTA
INA-
1
2
3
4
8
7
6
5
V
DD
OUT
1
2
3
5
4
V
DD
V
OUTB
INB-
DD
MAX4250
MAX4250A
MAX4255
MAX4251
MAX4256
MAX4252
MAX4257
V
SS
IN+
OUT
N.C.
INA+
V
SS
V
SS
INB+
IN+
IN-
µMAX/SO
µMAX/SO
SOT23
+
+
+
OUTA
INA-
1
14
V
OUTA
INA-
1
14 OUTD
13 IND-
12 IND+
OUTA
1
2
3
4
5
10
9
V
DD
DD
2
3
4
5
6
7
13 OUTB
12 INB-
11 INB+
10 N.C.
INA-
INA+
OUTB
INB-
2
3
4
5
6
7
MAX4249
MAX4253
INA+
8
INA+
MAX4249
MAX4253
V
SS
7
INB+
V
SS
V
DD
11
V
SS
MAX4254
SHDNA
6
SHDNB
N.C.
SHDNA
N.C.
INB+
INB-
10 INC+
9
8
SHDNB
N.C.
9
8
INC-
µMAX
OUTB
OUTC
SO
SO
Ordering Information (continued)
PIN-
PACKAGE
TOP
MARK
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8 SO
—
—
MAX4251ESA+
MAX4251EUA+
MAX4252EBL+T
MAX4252ESA+
MAX4252EUA+
8 µMAX
8 UCSP
8 SO
AAO
—
8 µMAX
10 UCSP
10 µMAX
14 SO
—
AAK
—
MAX4253EBC+T
MAX4253EUB+
MAX4253ESD+
MAX4254ESD+
MAX4255EUK+T
MAX4256ESA+
MAX4256EUA+
MAX4257ESA+
—
14 SO
—
5 SOT23
8 SO
ACCJ
—
8 µMAX
8 SO
—
—
MAX4257ESA/V+T -40°C to +85°C
8 SO
—
MAX4257EUA+
-40°C to +85°C
8 µMAX
—
14
Maxim Integrated
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a
"+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
LAND
PATTERN NO.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
5 SOT-23
8 µMAX
U5+2
U8+1
21-0057
21-0036
21-0061
21-0093
21-0041
21-0104
90-0174
90-0092
90-0330
—
10 µMAX
3 x 3 µCSP
14 SOIC
12 µCSP
U10+2
B9+5
S14+1
B12+4
90-0112
—
Maxim Integrated
15
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Revision History
REVISION REVISION
DESCRIPTION
PAGES
CHANGED
NUMBER
DATE
10/11
12/12
Added lead-free packaging to the Ordering Information and changed the Input Bias
8
9
1, 2, 14
14
Current and Input Offset Current conditions in the Electrical Characteristics table
Added MAX4257ESA/V+T to Ordering Information.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
16
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
© 2012 Maxim Integrated Products, Inc.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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