MAX4488ASA+ [MAXIM]
SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps;
| 型号： | MAX4488ASA+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps |
| 文件： | 总17页 (文件大小：2484K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
General Description
Features
● Low Input Voltage-Noise Density: 4.5nV/√Hz
● Low Input Current-Noise Density: 0.5fA/√Hz
● Low Distortion: 0.0002% THD+N (1kΩ load)
● Single-Supply Operation from +2.7V to +5.5V
The MAX4475–MAX4478/MAX4488/MAX4489 wide-
band, low-noise, low-distortion operational amplifiers
offer rail-to-rail outputs and single-supply operation
down to 2.7V. They draw 2.2mA of quiescent supply
current per amplifier while featuring ultra-low distortion
(0.0002% THD+N), as well as low input voltage-noise
density (4.5nV/√Hz) and low input current-noise density
(0.5fA/√Hz). These features make the devices an ideal
choice for applications that require low distortion and/or
low noise.
● Input Common-Mode Voltage Range Includes
Ground
● Rail-to-Rail Output Swings with a 1kΩ Load
● 10MHz GBW Product, Unity-Gain Stable
(MAX4475–MAX4478)
● 42MHz GBW Product, Stable with AV ≥ +5V/V
(MAX4488/MAX4489)
For power conservation, the MAX4475/MAX4488 offer
a low-power shutdown mode that reduces supply cur-
rent to 0.01µA and places the amplifiers’ outputs into a
high-impedance state. These amplifiers have outputs
which swing rail-to-rail and their input common-mode
voltage range includes ground. The MAX4475–MAX4478
are unity-gain stable with a gain-bandwidth product
of 10MHz. The MAX4488/4489 are internally compen-
sated for gains of +5V/V or greater with a gain-band-
width product of 42MHz. The single MAX4475/MAX4476/
MAX4488 are available in space-saving, 6-pin SOT23
and TDFN packages.
● Excellent DC Characteristics
V
= 70µV
= 1pA
OS
I
BIAS
Large-Signal Voltage Gain = 120dB
● Low-Power Shutdown Mode:
● Reduces Supply Current to 0.01µA
● Places Output in High-Impedance State
● Available in Space-Saving SOT23, TDFN, µMAX®,
and TSSOP Packages
● AEC-Q100 Qualified, Refer to Ordering Information
for the List of /V Parts
Applications
● ADC Buffers
Ordering Information at end of data sheet.
● DAC Output Amplifiers
● Low-Noise Microphone/Preamplifiers
● Digital Scales
● Strain Gauges/Sensor Amplifiers
● Medical Instrumentation
● Automotive
Typical Operating Characteristic
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
25
µMAX is a registered trademark of Maxim Integrated Products, Inc.
20
15
10
5
0
10
100
1k
10k
100k
FREQUENCY (Hz)
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
19-2137; Rev 11; 4/19
MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Absolute Maximum Ratings
Power-Supply Voltage (V
to V )....................-0.3V to +6.0V
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
14-Pin SO (derate 8.33mW/°C above +70°C).............667mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C)........727mW
Operating Temperature Range......................... -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
Analog Input Voltage (IN_+, IN_-).(V - 0.3V) to (V
+ 0.3V)
SS
DD
SHDN Input Voltage..................................(V - 0.3V) to +6.0V
Output Short-Circuit Duration to Either Supply .........Continuous
Continuous Input Current (IN+, IN-).................................±10mA
Continuous Power Dissipation (T = +70°C)
A
6-Pin SOT23 (derate 5.4mW/°C above +70°C) .......431.3mW
6-Pin TDFN (derate 18.2mW/°C above 70°C) ..........1454mW
8-Pin µMAX (derate 4.5mW/°C above +70°C)............362mW
SS
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.
Package Information
SOT23-6
PACKAGE CODE
U6F+6
Outline Number
21-0058
90-0175
Land Pattern Number
Thermal Resistance, Single-Layer Board
Junction to Ambient (θ
)
185.5°C/W
75°C/W
JA
Junction to Case (θ
)
JC
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
134.4°C/W
39°C/W
JA
Junction to Case (θ
)
JC
µMAX-8
PACKAGE CODE
U8+4
Outline Number
21-0036
90-0092
Land Pattern Number
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
206°C/W
42
JA
Junction to Case (θ
)
JC
µMAX-8
PACKAGE CODE
U8+1
Outline Number
21-0036
90-0092
Land Pattern Number
Thermal Resistance, Single-Layer Board
Junction to Ambient (θ
)
221°C/W
42°C/W
JA
Junction to Case (θ
)
JC
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
206°C/W
42°C/W
JA
Junction to Case (θ
)
JC
Maxim Integrated
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Package Information (continued)
TSSOP-14
PACKAGE CODE
U14+2
Outline Number
21-0066
90-0113
Land Pattern Number
Thermal Resistance, Single-Layer Board
Junction to Ambient (θ
)
110°C/W
30°C/W
JA
Junction to Case (θ
)
JC
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
100.4°C/W
30°C/W
JA
Junction to Case (θ
)
JC
SO-8
PACKAGE CODE
S8+4
Outline Number
21-0041
90-0096
Land Pattern Number
Thermal Resistance, Single-Layer Board
Junction to Ambient (θ
)
170°C/W
40
JA
Junction to Case (θ
)
JC
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
132°C/W
38
JA
Junction to Case (θ
)
JC
SO-14
PACKAGE CODE
S14+4
Outline Number
21-0041
90-0112
Land Pattern Number
Thermal Resistance, Single-Layer Board
Junction to Ambient (θ
)
120°C/W
37°C/W
JA
Junction to Case (θ
)
JC
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
84°C/W
34°C/W
JA
Junction to Case (θ
)
JC
Maxim Integrated
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Package Information (continued)
TDFN-6
PACKAGE CODE
T633+2
Outline Number
21-0137
90-0058
Land Pattern Number
Thermal Resistance, Single-Layer Board
Junction to Ambient (θ
)
55°C/W
9°C/W
JA
Junction to Case (θ
)
JC
Thermal Resistance, Multi-Layer Board
Junction to Ambient (θ
)
42°C/W
9°C/W
JA
Junction to Case (θ
)
JC
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.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Maxim Integrated
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
DC Electrical Characteristics
(V
= +5V, V
= 0V, V
= 0V, V
= V /2, R tied to V /2, SHDN = V , T = -40°C to +125°C, unless otherwise noted.
DD
SS
CM
OUT
DD
L
DD
DD
A
Typical values are at T = +25°C.) (Notes 1, 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range
V
(Note 3)
2.7
5.5
V
DD
V
V
= 3V
= 5V
2.2
2.5
DD
DD
Normal mode
mA
µA
µV
Quiescent Supply Current Per
Amplifier
I
4.4
1.0
D
Shutdown mode (SHDN = V ) (Note 2)
0.01
±70
SS
T
= +25°C
±350
±750
±6
A
A
Input Offset Voltage
V
OS
T
= -40°C to +125°C
Input Offset Voltage Tempco
Input Bias Current
TC
±0.3
±1
µV/°C
pA
VOS
I
(Note 4)
(Note 4)
±150
±150
B
Input Offset Current
I
±1
pA
OS
Differential Input Resistance
R
1000
GΩ
IN
T
T
= +25°C
-0.2
-0.1
V
V
- 1.6
A
DD
Input Common-Mode Voltage
Range
Guaranteed by
CMRR Test
V
CM
V
= -40°C to +125°C
- 1.7
A
DD
(V - 0.2V) ≤
SS
CM
1.6V)
V
≤ (V
–
T
= +25°C
90
90
115
DD
A
A
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Large-Signal Voltage Gain
CMRR
PSRR
dB
dB
dB
(V - 0.1V) ≤
SS
V
≤ (V
–
T
= -40°C to +125°C
CM
DD
1.7V)
V
= 2.7 to 5.5V
90
90
120
120
DD
R = 10kΩ to V /2;
L
OUT
DD
V
= 100mV to (V
- 125mV)
- 250mV)
- 500mV)
DD
R = 1kΩ to V /2;
L
OUT
DD
A
85
85
110
110
VOL
V
= 200mV to (V
DD
R
OUT
= 500Ω to V /2;
L
DD
V
= 350mV to (V
DD
V
DD
V
OL
V
DD
V
OL
V
DD
V
OL
- V
10
10
45
OH
|V
- V | ≥ 10mV,
IN-
IN+
R = 10kΩ to V /2
L
DD
- V
- V
40
SS
80
200
150
300
250
OH
SS
|V
IN+
- V | ≥ 10mV,
IN-
Output Voltage Swing
V
OUT
mV
R = 1kΩ to V /2
L
DD
- V
- V
50
100
80
OH
SS
|V
IN+
- V | ≥ 10mV,
IN-
R = 500Ω to V /2
L
DD
- V
Output Short-Circuit Current
Output Leakage Current
I
48
mA
µA
SC
Shutdown mode (SHDN = V ),
OUT
SS
I
±0.001
±1.0
LEAK
V
= V to V
SS DD
SHDN Logic-Low
SHDN Logic-High
SHDN Input Current
Input Capacitance
V
0.3 x V
V
V
IL
DD
V
0.7 x V
IH
DD
SHDN = V to V
0.01
10
1
µA
pF
SS
DD
C
IN
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
AC Electrical Characteristics
(V
= +5V, V = 0V, V
= 0V, V
= V /2, R tied to V /2, SHDN = V , T = +25°C.)
DD
SS
CM
OUT DD L DD DD A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX4475–MAX4478
MAX4488/MAX4489
MAX4475–MAX4478
MAX4488/MAX4489
MAX4475–MAX4478
MAX4488/MAX4489
f = 0.1Hz to 10Hz
f = 10Hz
A
V
A
V
A
V
A
V
A
V
A
V
= +1V/V
= +5V/V
= +1V/V
= +5V/V
= +1V/V
= +5V/V
10
42
Gain-Bandwidth Product
Slew Rate
GBWP
MHz
3
SR
V/µs
MHz
10
0.4
1.25
260
21
Full-Power Bandwidth (Note 5)
e
Peak-to-Peak Input Noise Voltage
nV
P-P
n(P-P)
Input Voltage-Noise Density
Input Current-Noise Density
e
f = 1kHz
4.5
3.5
0.5
nV/√Hz
fA/√Hz
n
f = 30kHz
i
f = 1kHz
n
V
A
= 2V
,
OUT
V
P-P
f = 1kHz
f = 20kHz
f = 1kHz
f = 20kHz
f = 1kHz
f = 20kHz
0.0002
0.0007
0.0002
0.001
= +1V/V
(MAX4475–MAX4478),
R = 10kΩ to GND
L
V
A
= 2V
,
OUT
V
P-P
Total Harmonic Distortion Plus
Noise (Note 6)
= +1V/V
THD + N
%
(MAX4475–MAX4478),
R = 1kΩ to GND
L
V
A
= 2V
,
OUT
V
P-P
0.0004
0.0006
= +5V/V (MAX4488/
MAX4489),
R = 10kΩ to GND
L
V
A
= 2V
,
f = 1kHz
0.0005
0.008
OUT
V
P-P
Total Harmonic Distortion Plus
Noise (Note 6)
= +5V/V
THD + N
%
(MAX4488/MAX4489),
f = 20kHz
R = 1kΩ to GND
L
Capacitive-Load Stability
Gain Margin
No sustained oscillations
200
12
70
80
2
pF
dB
GM
MAX4475–MAX4478, A = +1V/V
V
Phase Margin
FM
degrees
MAX4488/MAX4489, A = +5V/V
V
Settling Time
To 0.01%, V
= 2V step
µs
µs
µs
µs
OUT
Delay Time to Shutdown
Enable Delay Time from Shutdown
Power-Up Delay Time
t
t
1.5
10
13
SH
EN
V
V
= 2.5V, V
settles to 0.1%
OUT
OUT
= 0 to 5V step, V
stable to 0.1%
DD
OUT
Note 1: All devices are 100% tested at T = +25°C. Limits over temperature are guaranteed by design.
A
Note 2: SHDN is available on the MAX4475/MAX4488 only.
Note 3: Guaranteed by the PSRR test.
Note 4: Guaranteed by design.
Note 5: Full-power bandwidth for unity-gain stable devices (MAX4475–MAX4478) is measured in a closed-loop gain of +2V/V to
accommodate the input voltage range, V = 4V
.
P-P
OUT
Note 6: Lowpass-filter bandwidth is 22kHz for f = 1kHz and 80kHz for f = 20kHz. Noise floor of test equipment = 10nV/√Hz.
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Typical Operating Characteristics
(V
= +5V, V
= 0V, V
= 0V, V
= V /2, R tied to V /2, input noise floor of test equipment =10nV/√Hz for all distortion
DD
SS
CM
OUT DD L DD
measurements, T = +25°C, unless otherwise noted.)
A
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
INPUT OFFSET VOLTAGE DISTRIBUTION
OFFSET VOLTAGE vs. TEMPERATURE
18
250
50
40
30
20
V
COM
= 0V
16
14
12
10
8
200
150
100
50
0
-50
6
V
= 3V
-100
-150
-200
-250
DD
4
10
0
V
DD
= 5V
2
0
-50 -40 -30 -20 -10
0
10 20 30 40 50
-50 -25
0
25
50
75 100 125
-0.5
0.5
1.5
2.5
3.5
4.5
V
(µV)
TEMPERATURE (°C)
INPUT COMMON-MODE VOLTAGE (V)
OS
OUTPUT VOLTAGE
vs. OUTPUT LOAD CURRENT
OUTPUT VOLTAGE SWING (V
vs. TEMPERATURE
)
OUTPUT VOLTAGE SWING (V
)
OL
OH
vs. TEMPERATURE
0.25
0.20
0.15
0.10
0.05
0
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
V
= 3V OR 5V
DD
= 10mV
DIFF
V
- V
OH
DD
R = 1kΩ
L
V
OL
R = 1kΩ
L
R = 10kΩ
L
R = 10kΩ
L
0
1
2
3
4
5
6
7
8
9
10
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
OUTPUT LOAD CURRENT (mA)
TEMPERATURE (°C)
TEMPERATURE (°C)
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
130
120
110
100
90
130
120
110
100
90
130
120
110
100
90
R = 200kΩ
R = 20kΩ
L
R = 2kΩ
L
R = 2kΩ R = 20kΩ R = 200kΩ
L
L
L
L
R = 20kΩ R = 200kΩ
L
L
R = 2kΩ
L
80
80
80
70
70
70
V
= 3V
V
= 3V
V
= 5V
DD
DD
DD
60
60
60
R REFERENCED TO GND
R REFERENCED TO V
R REFERENCED TO GND
L
L
DD
L
50
50
50
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
OUT
SWING FROM EITHER SUPPLY (mV)
V
OUT
SWING FROM EITHER SUPPLY (mV)
OUT
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= +5V, V
= 0V, V
= 0V, V
= V /2, R tied to V /2, input noise floor of test equipment =10nV/√Hz for all distortion
DD
SS
CM
OUT
DD
L
DD
measurements, T = +25°C, unless otherwise noted.)
A
LARGE-SIGNAL VOLTAGE GAIN
vs. OUTPUT VOLTAGE SWING
LARGE-SIGNAL VOLTAGE GAIN
vs. TEMPERATURE
SUPPLY CURRENT
vs. TEMPERATURE
130
120
110
100
90
140
130
120
110
100
90
3.0
2.5
2.0
1.5
1.0
0.5
0
R = 200kΩ
PER AMPLIFIER
L
R = 100kΩ
L
R = 10kΩ
L
R = 20kΩ
L
R = 2kΩ
L
80
80
70
70
V
= 5V
DD
60
60
R REFERENCED TO V
L
DD
V
= 150mV TO 4.75V
OUT
50
50
0
50
100
150
200
250
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
V
OUT
SWING FROM EITHER SUPPLY (mV)
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs.OUTPUT VOLTAGE
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
20
15
10
5
3.0
2.5
2.0
1.5
1.0
0.5
0
3.0
PER AMPLIFIER
V
= 5V
DD
2.5
2.0
1.5
1.0
0.5
0
V
= 3V
DD
0
-5
-10
-15
-20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
1
2
3
4
5
2.5
3.0
3.5
SUPPLY VOLTAGE (V)
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX4475–MAX4478
GAIN AND PHASE vs. FREQUENCY
MAX4488/MAX4489
GAIN AND PHASE vs. FREQUENCY
MAX4475 toc16
MAX4475 toc17
60
180
144
60
50
40
30
20
10
0
180
144
108
72
V
= 3V OR 5V
DD
GAIN
50
40
30
20
10
0
R = 50kΩ
L
GAIN
C = 20pF
L
108
72
A
V
= +1000V/V
36
36
0
0
-36
-72
-108
-144
-180
-36
-72
-108
-144
-180
-10
-20
-30
-40
-10
-20
V
= 3V OR 5V
R = 50kΩ
DD
PHASE
L
PHASE
C = 20pF
A
L
-30
-40
= +1000V/V
V
100
1k
10k 100k 1M
INPUT FREQUENCY (Hz)
10M 100M
100
1k
10k 100k 1M
10M 100M
INPUT FREQUENCY (Hz)
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= +5V, V
= 0V, V
= 0V, V
= V /2, R tied to V /2, input noise floor of test equipment =10nV/√Hz for all distortion
DD
SS
CM
OUT DD L DD
measurements, T = +25°C, unless otherwise noted.)
A
MAX4475–MAX4478
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT IMPEDANCE
vs. FREQUENCY
1000
100
10
0
-10
-20
V
DD
= 3V OR 5V
-30
-40
-50
A
= +5
-60
V
-70
1
-80
-90
A
= +1
1k
V
-100
-110
-120
-130
0.1
0.01
0.001
0.1
10
1000
100,000
1
10
100
FREQUENCY (Hz)
10k
FREQUENCY (kHz)
MAX4475
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
TOTAL HARMONIC DISTORTION PLUS NOISE
0.1Hz TO 10Hz NOISE
P-P
MAX4475 toc21
vs. OUTPUT VOLTAGE SWING
25
10
A
= +1
V
V
= 3V OR 5V
V
DD
R = 100kΩ
NOISE = 260nV
L
P-P
P-P
1
0.1
20
15
10
5
200nV/div
0.01
f
= 20kHz, FILTER BW = 80kHz
O
0.001
f
= 3kHz, FILTER BW = 30kHz
O
0.0001
0
1s/div
10
100
1k
10k
100k
0
1
2
3
4
FREQUENCY (Hz)
OUTPUT VOLTAGE (V
)
P-P
MAX4488/MAX4489
MAX4488/MAX4489
MAX4475–MAX4478
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE SWING
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
0.01
10
0.01
A
V
= +5
FILTER BW = 80kHz
R = 100kΩ
L
V
A
= 2V
= +1
OUT
P-P
1
0.1
V
R = 1kΩ
L
V
= +3V, f = 20kHz
O
0.01
0.001
DD
0.001
A
= +10, V = 3V
DD
V
FILTER BW = 80kHz
A
V
= +10, V = 5V
DD
FILTER BW = 22kHz
R TO V /2
L
DD
R TO GND
L
R = 10kΩ TO GND
L
V
DD
= 3V, f = 3kHz
O
0.0001
R1 = 5.6kΩ, R2 = 53kΩ
FILTER BW = 30kHz
V
= 2V
R TO V
L
OUT
P-P
DD
0.001
0.00001
0.0001
0
1
2
3
0
5k
10k
FREQUENCY (Hz)
15k
20k
0
5k
10k
FREQUENCY (Hz)
15k
20k
OUTPUT VOLTAGE (V
)
P-P
Maxim Integrated
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= +5V, V
= 0V, V
= 0V, V
= V /2, R tied to V /2, input noise floor of test equipment =10nV/√Hz for all distortion
DD
SS
CM
OUT DD L DD
measurements, T = +25°C, unless otherwise noted.)
A
MAX4488/MAX4489
TOTAL HARMONIC DISTORTION PLUS NOISE
MAX4475–MAX4478
LARGE-SIGNAL PULSE RESPONSE
MAX4475–MAX4478
SMALL-SIGNAL PULSE RESPONSE
MAX4475 toc27
MAX4475 toc28
vs. FREQUENCY
1
FILTER BW = 80kHz
R = 10kΩ TO GND
L
0.6V
R = 2.43kΩ, R = 10kΩ
1
2
2.5V
0.5V
V
OUT
= 2.75V
0.1
0.01
P-P
20mV/div
0.5V
A
V
= +5, V = 3V
DD
0.001
0.0001
A
= +5, V = 5V
DD
V
1µs/div
4µs/div
0
5k
10k
FREQUENCY (Hz)
15k
20k
V
V
= 3V, R = 10kΩ, C = 100pF
V
V
= 3V, R = 10kΩ, C = 100pF
DD L L
DD
L
L
= 2V
= 100mV PULSE
IN
IN
MAX4488/MAX4489
SMALL-SIGNAL PULSE RESPONSE
MAX4488/MAX4489
LARGE-SIGNAL PULSE RESPONSE
MAX4477/MAX4478/MAX4489
CROSSTALK vs. FREQUENCY
MAX4475 toc30
MAX4475 toc29
-20
-30
-40
-50
1.6V
V
OUT
50mV/div
V
OUT
1.5V
200mV/div
-60
-70
-80
-90
1µs/div
1µs/div
10 100 1000 10k 100k 1M 10M 100M
FREQUENCY (Hz)
V
V
= 3V, R = 10kΩ, C = 50pF
V
V
= 3V, R = 10kΩ, C = 50pF
DD
L
L
DD
L
L
= 20mV PULSE, A = +5V/V
= 20mV PULSE, A = +5V/V
IN
V
IN
V
Maxim Integrated
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Pin Description
PIN
MAX4475/
MAX4488
MAX4475/
MAX4488
MAX4477/
MAX4489
MAX4476
SOT23/TDFN
MAX4478
NAME
FUNCTION
SOT23/TDFN
SO/µMAX
SO/µMAX
SO/TSSOP
OUT, OUTA,
OUTB, OUTC,
OUTD
1
6
1
2
3
1, 7
1, 7, 8, 14
11
Amplifier Output
Negative Supply. Connect
to ground for single-supply
operation
2
3
4
3
4
V
SS
IN+, INA+, INB+, Noninverting Amplifier
INC+, IND+
3, 5
3, 5, 10, 12
Input
IN-, INA-, INB-,
INC-, IND-
4
6
2
7
4
6
2, 6
8
2, 6, 9, 13
4
Inverting Amplifier Input
V
DD
Positive Supply
Shutdown Input. Connect
to V
for normal
DD
5
8
—
—
—
SHDN
operation (amplifier(s)
enabled).
No Connection. Not
internally connected.
—
1, 5
—
5
—
—
—
—
N.C.
EP
Exposed Paddle (TDFN
EP
EP
Only). Connect to V
.
SS
Maxim Integrated
│ 11
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Detailed Description
The MAX4475–MAX4478/MAX4488/MAX4489 single-
supply operational amplifiers feature ultra-low noise and
distortion. Their low distortion and low noise make them
ideal for use as preamplifiers in wide dynamic-range appli-
cations, 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-im-
pedance sources, such as piezoelectric transducers.
C
Z
R
F
R
G
V
OUT
V
IN
These devices have true rail-to-rail output operation, drive
loads as low as 1kΩ while maintaining DC accuracy, and
can drive capacitive loads up to 200pF without oscillation.
The input common-mode voltage range extends from
Figure 1. Adding Feed-Forward Compensation
(V
- 1.6V) to 200mV below the negative rail. The push-
pull output stage maintains excellent DC characteristics,
while delivering up to ±5mA of current.
DD
A
R
= +2
= R = 100kΩ
G
V
F
V
IN
100mV
0V
100mV/div
The MAX4475–MAX4478 are unity-gain stable, while
the MAX4488/MAX4489 have a higher slew rate and are
stable for gains ≥ 5V/V. The MAX4475/MAX4488 feature
a low-power shutdown mode, which reduces the supply
current to 0.01µA and disables the outputs.
V
OUT
100mV/div
Low Distortion
Many factors can affect the noise and distortion that the
device contributes to the input signal. The following guide-
lines offer valuable information on the impact of design
choices on Total Harmonic Distortion (THD).
2µs/div
Figure 2a. Pulse Response with No Feed-Forward
Compensation
Choosing proper feedback and gain resistor values for
a particular application can be a very important factor in
reducing THD. In general, the smaller the closed-loop
gain, the smaller the THD generated, especially when
driving heavy resistive loads. The THD of the part nor-
mally increases at approximately 20dB per decade, as a
function of frequency. Operating the device near or above
the full-power bandwidth significantly degrades distortion.
A
R
= +2
= R = 100kΩ
G
V
F
V
IN
100mV/div
V
OUT
100mV/div
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 output.
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.)
2µs/div
Figure 2b. Pulse Response with 10pF Feed-Forward
Compensation
For gains ≥ 5V/V, the decompensated devices MAX4488/
MAX4489 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 100pF do not significantly affect
distortion results. Distortion performance is relatively con-
stant over supply voltages.
Maxim Integrated
│ 12
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Low Noise
A
= +1
V
= +5V
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 thermal
noise contribution is affected by the parallel combination
V
DD
R
= 10kΩ
L
V
IN
2V/div
of the feedback resistive network (R || R , Figure 1),
F
G
0V
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.
V
OUT
2V/div
For example, the input noise-voltage density of the
40µs/div
circuit with R = 100kΩ, R = 11kΩ (A = +5V/V) is
F
G
V
e = 14nV/√Hz, e can be reduced to 6nV/√Hz by choos-
Figure 3. Overdriven Input Showing No Phase Reversal
n
n
ing R = 10kΩ, R = 1.1kΩ (A = +5V/V), at the expense
F
G
V
of greater current consumption and potentially higher
distortion. For a gain of 100V/V with R = 100kΩ, R
=
G
F
5V
1.1kΩ, the e is still a low 6nV/√Hz.
n
Using a Feed-Forward Compensation
Capacitor, CZ
V
OUT
1V/div
The amplifier’s input capacitance is 10pF. If the resistance
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 a feed-forward
0V
20ms/div
capacitor (C ) between the inverting input and the out-
put (Figure 1). This effectively cancels the pole from the
Z
Figure 4. Rail-to-Rail Output Operation
inverting input of the amplifier. Choose the value of C
as follows:
Z
Ground-Sensing and Rail-to-Rail Outputs
C = 10 x (R / R ) [pF]
The common-mode input range of these devices extends
below ground, and offers excellent common-mode rejec-
tion. These devices are guaranteed not to undergo phase
reversal when the input is overdriven (Figure 3).
Z
F
G
In the unity-gain stable MAX4475–MAX4478, the use
of a proper C is most important for A = +2V/V, and
Z
V
A
V
= -1V/V. In the decompensated MAX4488/MAX4489,
C is most important for A = +10V/V. Figures 2a and 2b
Figure 4 showcases the true rail-to-rail output operation
Z
V
show transient response both with and without C .
of the amplifier, configured with A = 5V/V. The output
Z
V
swings to within 8mV of the supplies with a 10kΩ load,
making the devices ideal in low-supply voltage applica-
tions.
Using a slightly smaller C than suggested by the formula
Z
above achieves a higher bandwidth at the expense of
reduced phase and gain margin. As a general guideline,
consider using C for cases where R || R is greater
than 20kΩ (MAX4475–MAX4478) or greater than 5kΩ
(MAX4488/MAX4489).
Z
G
F
Power Supplies and Layout
The MAX4475–MAX4478/MAX4488/MAX4489 operate
from a single +2.7V to +5.5V power supply or from dual
supplies of ±1.35V to ±2.75V. For single-supply opera-
tion, bypass the power supply with a 0.1µF ceramic
Applications Information
The MAX4475–MAX4478/MAX4488/MAX4489 combine
good driving capability with ground-sensing input and
rail-to-rail output operation. With their low distortion and
low noise, they are ideal for use in ADC buffers, medical
instrumentation systems and other noise-sensitive appli-
cations.
Maxim Integrated
│ 13
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Typical Application Circuit
+5V
+2.5V
+5V
7
V
DD
CS
U2
REF
OUT
U1
3
2
MAX4475AUA
SERIAL
SCLK
0 to +2.5V
MAX5541ESA
INTERFACE
OUTPUT
6
AGND
DIN
DGND
8
4
SHDN
Typical Operating Circuit
5V
470pF
0.1µF
220pF
5
3.09kΩ
1%
7.87kΩ
1%
3
8
3.83kΩ
1%
13.7kΩ
1%
220pF
1
7.15kΩ
1%
MAX4477
1/2
220pF
7
2
1/2 MAX4477
4
220pF
6
10.0kΩ
1%
10.0kΩ
1%
15.0kΩ
1%
10.0kΩ
1%
capacitor placed close to the V
dual supplies, bypass each supply to ground.
pin. If operating from
of error. In addition, the MAX4475 has excellent open-
loop gain and common-mode rejection, making this an
excellent output buffer amplifier.
DD
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, mini-
mize PC board trace lengths and resistor leads, and place
external components close to the op amp’s pins.
DC-Accurate Lowpass Filter
The MAX4475–MAX4478/MAX4488/MAX4489 offer a
unique combination of low noise, wide bandwidth, and
high gain, making them an excellent choice for active
filters up to 1MHz. The Typical Operating Circuit shows
the dual MAX4477 configured as a 5th order Chebyschev
filter with a cutoff frequency of 100kHz. The circuit is
implemented in the Sallen-Key topology, making this a
DC-accurate filter.
Typical Application Circuit
The Typical Application Circuit shows the sin-
gle MAX4475 configured as an output buffer for the
MAX5541 16-bit DAC. Because the MAX5541 has an
unbuffered voltage output, the input bias current of the
op amp used must be less than 6nA to maintain 16-bit
accuracy. The MAX4475 has an input bias current of
only 150pA (max), virtually eliminating this as a source
Maxim Integrated
│ 14
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Pin Configurations
TOP VIEW
TOP VIEW
+
+
V
SHDN
N.C.
8
7
6
5
OUTA
INA-
1
2
3
4
8
7
6
5
DD
V
OUTB
INB-
INA-
2
3
4
DD
MAX4475
MAX4488
MAX4477
MAX4489
INA+
OUT
N.C.
INA+
V
SS
V
SS
INB+
SO/MAX
SO/MAX
TOP VIEW
OUT
TOP VIEW
TOP VIEW
+
+
6
5
4
OUTA
1
2
3
4
5
6
7
14 OUTD
13 IND-
12 IND+
1
2
3
6
5
4
V
DD
INA-
MAX4475
MAX4488
INA+
V
SHDN
IN-
SS
MAX4475
MAX4488
V
MAX4478
11
V
SS
DD
INB+
INB-
10 INC+
IN+
EP
9
8
INC-
SOT23-6
+
OUTB
OUTC
1
2
3
SO/TSSOP
TDFN
TOP VIEW
OUT
TOP VIEW
+
6
5
4
1
2
3
6
5
4
V
DD
MAX4476
N.C.
IN-
V
SS
MAX4476
IN+
EP
SOT23-6
+
1
2
3
TDFN
Maxim Integrated
│ 15
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Ordering Information
Chip Information
PROCESS: BiCMOS
PIN-
PACKAGE
TOP
MARK
PART
TEMP RANGE
MAX4475AUT+T
MAX4475AUA+
MAX4475ASA+
MAX4475ATT+T
-40°C to +125°C 6 SOT23
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 SO
AAZV
—
Selector Guide
STABLE
GAIN
(V/V)
GAIN BW
(MHz)
NO. OF
AMPS
—
PART
SHDN
-40°C to +125°C 6 TDFN-EP* +ADD
MAX4475AUT/V+T -40°C to +125°C 6 SOT23
+ACQQ
AAZX
MAX4475
MAX4476
MAX4477
MAX4478
MAX4488
MAX4489
10
10
10
10
42
42
1
1
1
1
5
5
1
1
2
4
1
2
Yes
—
MAX4476AUT+T
MAX4476ATT+T
MAX4477AUA+
MAX4477AUA+
-40°C to +125°C 6 SOT23
—
-40°C to +125°C 6 TDFN-EP* +ADF
—
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 µMAX
—
—
Yes
—
MAX4477AUA/V+T -40°C to +125°C 8 µMAX
+AA/V
—
MAX4477ASA+
MAX4478AUD+
MAX4478AUD/V+
MAX4478ASD+
MAX4488AUT+T
MAX4488AUA+
MAX4488ASA+
MAX4488ATT+T
MAX4489AUA+
-40°C to +125°C 8 SO
-40°C to +125°C 14 TSSOP
-40°C to +125°C 14 TSSOP
-40°C to +125°C 14 SO
-40°C to +125°C 6 SOT23
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 SO
—
—
—
AAZW
—
—
-40°C to +125°C 6 TDFN-EP* +ADE
-40°C to +125°C 8 µMAX
—
—
—
MAX4489AUA/V+T -40°C to +125°C 8 µMAX
MAX4489ASA+ -40°C to +125°C 8 SO
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad (connect to V ).
SS
/V denotes an automotive qualified part.
T = Tape and reel.
Maxim Integrated
│ 16
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MAX4475–MAX4478/
MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion,
Wide-Band, Rail-to-Rail Op Amps
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
Added lead-free designations and an automotive part to the Ordering Information
and added input current spec in Absolute Maximum Ratings section
4
12/09
1, 2, 13
5
6
7/10
6/12
1/18
7/18
7/18
8/18
4/19
Added /V designation to the MAX4475 product and soldering temperature
Added /V designation for MAX4489.
1, 2
13
7
Added AEC statement to Features section
1
8
Updated Ordering Information table
14
9
Updated Absolute Maximum Rating and Package Information
Updated Package Information section
2, 14
2–4
1, 16
10
11
Updated General Description and Ordering Information section
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
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.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2019 Maxim Integrated Products, Inc.
│ 17
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