MAX4020EEE [MAXIM]
Low-Cost, High-Speed, SOT23, Single-Supply Op Amps with Rail-to-Rail Outputs; 低成本，高速， SOT23封装，单电源运算放大器，满摆幅输出
| 型号： | MAX4020EEE |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Low-Cost, High-Speed, SOT23, Single-Supply Op Amps with Rail-to-Rail Outputs |
| 文件： | 总16页 (文件大小：199K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1246; Rev 0; 7/97
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX4012 single, MAX4016 dual, MAX4018 triple,
a nd MAX4020 q ua d op a mp s a re unity-g a in-sta ble
devices that combine high-speed performance with
♦ Low-Cost
♦ High Speed:
®
200MHz -3dB Bandwidth (MAX4012)
150MHz -3dB Bandwidth (MAX4016/18/20)
30MHz 0.1dB Gain Flatness
600V/µs Slew Rate
Rail-to-Rail outputs. The MAX4018 has a disable fea-
ture that reduces power-supply current to 400µA and
places its outputs into a high-impedance state. These
devices operate from a +3.3V to +10V single supply or
from ±1.65V to ±5V dual supplies. The common-mode
inp ut volta g e ra ng e e xte nd s b e yond the ne g a tive
power-supply rail (ground in single-supply applica-
tions).
♦ Single 3.3V/5.0V Operation
♦ Rail-to-Rail Outputs
♦ Input Common-Mode Range Extends Beyond V
♦ Low Differential Gain/Phase: 0.02%/0.02°
EE
These devices require only 5.5mA of quiescent supply
current while achieving a 200MHz -3dB bandwidth and
a 600V/µs slew rate. These parts are an excellent solu-
tion in low-power/low-voltage systems that require wide
bandwidth, such as video, communications, and instru-
mentation. In addition, when disabled, their high output
impedance makes them ideal for multiplexing applica-
tions.
♦ Low Distortion at 5MHz:
-78dBc SFDR
-75dB Total Harmonic Distortion
♦ High Output Drive: ±120mA
♦ 400µA Shutdown Capability (MAX4018)
♦ High Output Impedance in Off State (MAX4018)
The MAX4012 comes in a miniature 5-pin SOT23 pack-
age, while the MAX4016 comes in 8-pin µMAX and SO
packages. The MAX4018/MAX4020 are available in a
space-saving 16-pin QSOP, as well as a 14-pin SO.
♦ Space-Saving SOT23-5, µMAX, or QSOP Packages
________________________Ap p lic a t io n s
Set-Top Boxes
______________Ord e rin g In fo rm a t io n
SOT
TOP
MARK
TEMP.
RANGE
PIN-
PACKAGE
Surveillance Video Systems
Battery-Powered Instruments
Video Line Driver
PART
MAX4012EUK
MAX4016ESA
MAX4016EUA
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
5 SOT23-5
8 SO
ABZP
—
Analog-to-Digital Converter Interface
CCD Imaging Systems
8 µMAX
—
Video Routing and Switching Systems
Ordering Information continued at end of data sheet.
__________Typ ic a l Op e ra t in g Circ u it
_________________P in Co n fig u ra t io n s
R
F
24Ω
TOP VIEW
1
2
3
5
4
V
OUT
CC
R
50Ω
TO
V
OUT
MAX4012
Z = 50Ω
O
V
EE
MAX4012
R
50Ω
IN
O
IN+
IN-
R
TIN
50Ω
SOT23-5
UNITY-GAIN LINE DRIVER
(R = R + R
)
TO
Pin Configurations continued at end of data sheet.
L
O
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
For small orders, phone 408-737-7600 ext. 3468.
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V to V )................................................+12V
8-Pin µMAX (derate 4.1mW/°C above +70°C) ............330mW
14-Pin SO (derate 8.3mW/°C above +70°C) ...............667mW
16-Pin QSOP (derate 8.3mW/°C above +70°C) ..........667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
CC
EE
IN_-, IN_+, OUT_, EN_.....................(V - 0.3V) to (V + 0.3V)
EE
CC
Output Short-Circuit Duration to V or V ............. Continuous
CC
EE
Continuous Power Dissipation (T = +70°C)
A
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ...........571mW
8-Pin SO (derate 5.9mW/°C above +70°C) .................471mW
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 at 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.
DC ELECTRICAL CHARACTERISTICS
(V
= +5V, V = 0V, EN_ = +5V, R
=
to V / 2, V
= V / 2, T = T
to T , unless otherwise noted. Typical values
MAX
CC
EE
L
CC
CC
A
MIN
∞
OUT
are at T = +25°C.) (Note 1)
A
PARAMETER
SYMBOL
CONDITIONS
Guaranteed by CMRR test
MIN
TYP
MAX
UNITS
V
Input Common-Mode
Voltage Range
V
EE
-
V
CC
-
V
CM
0.20
2.25
Input Offset Voltage (Note 2)
V
4
8
20
mV
OS
Input Offset Voltage
Temperature Coefficient
TC
µV/°C
VOS
Any channels for MAX4016/MAX4018/
MAX4020
Input Offset Voltage Matching
±1
mV
Input Bias Current
Input Offset Current
I
(Note 2)
(Note 2)
5.4
0.1
20
20
µA
µA
kΩ
MΩ
dB
B
I
OS
Differential mode (-1V ≤ V ≤ +1V)
70
IN
Input Resistance
R
IN
Common mode (-0.2V ≤ V ≤ +2.75V)
3
CM
Common-Mode Rejection Ratio
CMRR
(V - 0.2V) ≤ V ≤ (V - 2.25V)
EE
70
52
100
61
CM
CC
0.25V ≤ V
≤ 4.75V, R = 2kΩ
L
OUT
Open-Loop Gain (Note 2)
A
0.5V ≤ V
≤ 4.5V, R = 150Ω
59
dB
VOL
OUT
L
1.0V ≤ V
≤ 4V, R = 50Ω
57
OUT
L
V
- V
0.06
0.06
0.30
0.30
0.6
CC
OH
R
R
= 2kΩ
L
L
V
OL
- V
EE
V
CC
- V
OH
618/MAX420
= 150Ω
V
OL
- V
EE
Output Voltage Swing
(Note 2)
V
OUT
V
V
CC
- V
1.5
1.5
OH
R
R
= 75Ω
= 75Ω
L
L
V
OL
- V
0.6
EE
V
CC
- V
1.1
2.0
OH
to ground
V
OL
- V
0.05
±120
±150
8
0.50
EE
Output Current
I
R
= 20Ω to V or V
±100
mA
mA
Ω
EE
OUT
L
CC
Output Short-Circuit Current
Open-Loop Output Resistance
I
Sinking or sourcing
SC
R
OUT
2
_______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
DC ELECTRICAL CHARACTERISTICS (continued)
(V
= +5V, V = 0V, EN_ = +5V, R
=
to V / 2, V
= V / 2, T = T
to T , unless otherwise noted. Typical values
MAX
CC
EE
L
CC
CC
A
MIN
∞
OUT
are at T = +25°C.) (Note 1)
A
PARAMETER
SYMBOL
CONDITIONS
= 5V, V = 0V, V = +2.0V
MIN
46
TYP
57
MAX
UNITS
V
CC
EE
CM
Power-Supply Rejection Ratio
(Note 3)
PSRR
V
CC
= 5V, V = -5V, V = 0V
54
66
dB
EE
CM
V
CC
= 3.3V, V = 0V, V = +0.90V
45
EE
CM
Operating Supply-Voltage
Range
V
V
to V
EE
3.15
28
11.0
V
S
CC
kΩ
V
Disabled Output Resistance
EN_ Logic-Low Threshold
EN_ Logic-High Threshold
R
EN_ = 0V, 0V ≤ V
≤ 5V (Note 4)
35
OUT (OFF)
OUT
V
IL
V
- 2.6
CC
V
IH
V
- 1.6
V
CC
(V + 0.2V) ≤ EN_ ≤ V
0.5
200
0.5
EE
CC
EN_ Logic Input Low Current
I
µA
µA
IL
EN_ = 0V
300
EN_ Logic Input High Current
I
IH
EN_ = 5V
10
Enabled
5.5
7.0
Quiescent Supply Current
(per Amplifier)
I
S
mA
MAX4018, disabled (EN_ = 0V)
0.40
0.55
_______________________________________________________________________________________
3
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
AC ELECTRICAL CHARACTERISTICS
(V = +5V, V = 0V, V
= 2.5V, EN_ = +5V, R = 24Ω, R = 100Ω to V / 2, V
= V / 2, A
= +1, T = +25°C, unless
VCL A
CC
EE
CM
F
L
CC
OUT
CC
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MAX4012
MIN
TYP
MAX
UNITS
200
Small-Signal -3dB Bandwidth
Large-Signal -3dB Bandwidth
BW
V
= 20mVp-p
= 2Vp-p
OUT
MHz
SS
OUT
MAX4016/MAX4018/
MAX4020
150
140
30
BW
V
MHz
MHz
LS
Bandwidth for 0.1dB Gain
Flatness
BW
V
OUT
= 20mVp-p (Note 5)
6
0.1dB
Slew Rate
SR
V
= 2V step
600
45
1
V/µs
ns
OUT
Settling Time to 0.1%
Rise/Fall Time
t
S
V
OUT
= 2V step
t , t
R
V = 100mVp-p
OUT
ns
F
Spurious-Free Dynamic
Range
SFDR
HD
f
= 5MHz, V
= 2Vp-p
-78
dBc
dBc
dB
C
OUT
2nd harmonic
-78
-82
3rd harmonic
f
= 5MHz,
C
Harmonic Distortion
V
= 2Vp-p
OUT
Total harmonic
distortion
-75
35
Two-Tone, Third-Order
Intermodulation Distortion
IP3
f1 = 10.0MHz, f2 = 10.1MHz, V
= 1Vp-p
dBc
OUT
Input 1dB Compression Point
Differential Phase Error
Differential Gain Error
f
= 10MHz, A
= +2
11
0.02
0.02
10
6
dBm
degrees
%
C
VCL
DP
NTSC, R = 150Ω
L
DG
NTSC, R = 150Ω
L
Input Noise-Voltage Density
Input Noise-Current Density
Input Capacitance
e
n
f = 10kHz
f = 10kHz
nV/√Hz
pA/√Hz
pF
i
n
C
1
IN
OUT (OFF)
Disabled Output Capacitance
Output Impedance
C
MAX4018, EN_ = 0V
f = 10MHz
2
pF
Ω
Z
6
OUT
Amplifier Enable Time
t
MAX4018
100
1
ns
ON
Amplifier Disable Time
t
MAX4018
µs
OFF
618/MAX420
MAX4016/MAX4018/MAX4020,
Amplifier Gain Matching
Amplifier Crosstalk
0.1
-95
dB
dB
f = 10MHz, V
= 20mVp-p
OUT
MAX4016/MAX4018/MAX4020,
f = 10MHz, V = 2Vp-p, R = 50Ω to ground
X
TALK
OU
T
S
Note 1: The MAX4012EUT is 100% production tested at T = +25°C. Specifications over temperature limits are guaranteed by
A
design.
Note 2: Tested with V = +2.5V.
CM
Note 3: PSR for single +5V supply tested with V = 0V, V = +4.5V to +5.5V; for dual ±5V supply with V = -4.5V to -5.5V,
EE
CC
EE
V
CC
= +4.5V to +5.5V; and for single +3.3V supply with V = 0V, V = +3.15V to +3.45V.
EE CC
Note 4: Does not include the external feedback network’s impedance.
Note 5: Guaranteed by design.
4
_______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V = +5V, V = 0V, A
= +1, R = 24Ω, R = 100Ω to V / 2, T = +25°C, unless otherwise noted.)
F L CC
A
CC
EE
VCL
MAX4012
MAX4012
MAX4016/18/20
SMALL-SIGNAL GAIN vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
(A = +1)
VCL
(A = +2)
VCL
(A = +1)
VCL
4
3
9
8
3
2
A
V
OUT
= +2
= 20mVp-p
A
V
OUT
= +1
= 20mVp-p
A
V
OUT
= +1
= 20mVp-p
VCL
VCL
VCL
2
1
0
7
6
5
4
3
2
1
0
1
0
-1
-2
-3
-4
-5
-6
-1
-2
-3
-4
-5
-6
-1
-7
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
FREQUENCY (Hz)
MAX4016/18/20
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4012
(A = +2)
VCL
LARGE-SIGNAL GAIN vs. FREQUENCY
GAIN FLATNESS vs. FREQUENCY
9
8
4
0.7
0.6
A
V
OUT
= +2
= 20mVp-p
V
= 2Vp-p
VCL
OUT
A
V
OUT
= +1
= 20mVp-p
VCL
3
V
= 1.75V
OUT BIAS
7
6
5
4
3
2
1
0
2
1
0.5
0.4
0.3
0.2
0.1
0
0
-1
-2
-3
-4
-5
-0.1
-0.2
-1
-6
-0.3
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
100M
1G
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
FREQUENCY (Hz)
MAX4016/18/20
GAIN FLATNESS vs. FREQUENCY
MAX4016/18/20
CROSSTALK vs. FREQUENCY
CLOSED-LOOP OUTPUT IMPEDANCE
vs. FREQUENCY
1000
100
10
0.5
0.4
50
30
10
A
V
OUT
= +1
= 20mVp-p
R = 50Ω
S
VCL
0.3
0.2
-10
-30
0.1
0
-50
-0.1
-0.2
-0.3
-0.4
-70
-90
1
-110
-130
-0.5
-150
0.1
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
100M
1G
0.1M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
_______________________________________________________________________________________
5
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = +5V, V = 0V, A
= +1, R = 24Ω, R = 100Ω to V / 2, T = +25°C, unless otherwise noted.)
F L
A
CC
EE
VCL
CC
HARMONIC DISTORTION
HARMONIC DISTORTION
HARMONIC DISTORTION
vs. FREQUENCY (A = +1)
VCL
vs. FREQUENCY (A = +2)
VCL
vs. FREQUENCY (A = +5)
VCL
0
0
0
V
A
VCL
= 2Vp-p
= +1
V
A
VCL
= 2Vp-p
= +2
V
OUT
A
VCL
= 2Vp-p
= +5
OUT
OUT
-10
-10
-10
-20
-30
-40
-50
-60
-70
-80
-90
-20
-30
-40
-50
-60
-70
-80
-90
-20
-30
-40
-50
-60
-70
-80
-90
2ND HARMONIC
3RD
2ND HARMONIC
2ND HARMONIC
3RD HARMONIC
HARMONIC
3RD HARMONIC
10M
-100
-100
-100
100k
1M
100M
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
HARMONIC DISTORTION
vs. LOAD
HARMONIC DISTORTION
vs. OUTPUT SWING
DIFFERENTIAL GAIN AND PHASE
0
0
0.03
f = 5MHz
= 2Vp-p
f = 5MHz
V
= +1.35V
CM
O
-10
-10
0.02
0.01
V
OUT
-20
-30
-40
-50
-60
-20
-30
-40
-50
-60
0.00
-0.01
0
100
IRE
IRE
0.03
0.02
0.01
0.00
-0.01
V
= +1.35V
CM
-70
-80
-90
-70
-80
-90
2rd HARMONIC
2ND HARMONIC
3RD HARMONIC
3rd HARMONIC
200
-100
-100
0
100
0
400
600
800
1000
0.5
1.0
1.5
2.0
LOAD (Ω)
OUTPUT SWING (Vp-p)
COMMON-MODE REJECTION
vs. FREQUENCY
POWER-SUPPLY REJECTION
vs. FREQUENCY
OUTPUT SWING
vs. LOAD RESISTANCE
618/MAX420
0
20
10
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
R to V /2
L
CC
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
-10
-20
-30
-40
-50
-60
-70
R to GROUND
L
A
= +2
VCL
-100
-80
100k
1M
10M
100M
100k
1M
10M
100M
25
50
75
100
125
150
FREQUENCY (Hz)
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
6
_______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = +5V, V = 0V, A
= +1, R = 24Ω, R = 100Ω to V / 2, T = +25°C, unless otherwise noted.)
F L CC
A
CC
EE
VCL
SMALL-SIGNAL PULSE RESPONSE
SMALL-SIGNAL PULSE RESPONSE
(C = 5pF, A = +1)
SMALL-SIGNAL PULSE RESPONSE
(A = +2)
VCL
(A = +1)
VCL
L
VCL
MAX4012-20
MAX4012-21
MAX4012-19
IN
(25mV/
div)
IN
(50mV/
div)
IN
(50mV/
div)
OUT
(25mV/
div)
OUT
(25mV/
div)
OUT
(25mV/
div)
TIME (20ns/div)
TIME (20ns/div)
TIME (20ns/div)
V
CM
= +1.25V, R = 100Ω to GROUND
V
CM
= +1.75V, R = 100Ω to GROUND
L
V
CM
= +2.5V, R = 100Ω to GROUND
L
L
LARGE-SIGNAL PULSE RESPONSE
(C = 5pF, A = +2)
LARGE-SIGNAL PULSE RESPONSE
LARGE-SIGNAL PULSE RESPONSE
(A = +2)
VCL
L
VCL
(A = +1)
VCL
MAX4012-24
MAX4012-22
MAX4012-23
IN
(1V/
div)
IN
(1V/div)
IN
(500mV/
div)
OUT
(500mV/
div)
OUT
(1V/div)
OUT
(500mV/
div)
TIME (20ns/div)
TIME (20ns/div)
TIME (20ns/div)
V
CM
= +1.75V, R = 100Ω to GROUND
L
V
CM
= +1.75V, R = 100Ω to GROUND
V
CM
= 0.9V, R = 100Ω to GROUND
L
L
CURRENT-NOISE DENSITY
vs. FREQUENCY
VOLTAGE-NOISE DENSITY
vs. FREQUENCY
ENABLE RESPONSE TIME
MAX4012-27
10
100
10
1
5.0V
(ENABLE)
EN_
0V
(DISABLE)
OUT
1V
0V
1
TIME (1µs/div)
1
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
1
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
V
IN
= +1.0V
_______________________________________________________________________________________
7
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = +5V, V = 0V, A
= +1, R = 24Ω, R = 100Ω to V / 2, T = +25°C, unless otherwise noted.)
F L CC
A
CC
EE
VCL
OPEN-LOOP GAIN
vs. LOAD RESISTANCE
CLOSED-LOOP BANDWIDTH
vs. LOAD RESISTANCE
OFF ISOLATION vs. FREQUENCY
70
60
50
40
30
20
400
10
0
350
300
250
200
150
100
50
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
100k
1M
10M
100M
0
200
400
600
800
1k
0
100
200
300
400
500
600
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
LOAD RESISTANCE (Ω)
SUPPLY CURRENT
vs. TEMPERATURE
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT OFFSET CURRENT
vs. TEMPERATURE
7
6
5
4
3
6.0
5.5
5.0
4.5
4.0
0.20
0.16
0.12
0.08
0.04
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
618/MAX420
SUPPLY CURRENT
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
vs. SUPPLY VOLTAGE
10
8
5
4
3
2
1
0
5.0
4.8
4.6
4.4
4.2
4.0
R = 150Ω TO V / 2
L
CC
6
4
2
0
3
4
5
6
7
8
9
10 11
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
8
_______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
______________________________________________________________P in De s c rip t io n
PIN
MAX4018
MAX4020
QSOP
NAME
FUNCTION
MAX4012 MAX4016
SOT23-5 SO/µMAX
SO
QSOP
SO
No Connect. Not internally connected.
Tie to ground or leave open.
—
1
—
—
4
—
8, 9
—
—
8, 9
—
N.C.
OUT
—
11
—
11
Amplifier Output
Negative Power Supply or Ground (in
single-supply operation)
2
13
13
V
EE
3
—
—
8
—
—
4
—
—
4
—
—
4
—
—
4
IN+
IN-
Noninverting Input
4
Inverting Input
5
V
CC
Positive Power Supply
Amplifier A Output
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1
7
7
1
1
OUTA
INA-
2
6
6
2
2
Amplifier A Inverting Input
Amplifier A Noninverting Input
Amplifier B Output
3
5
5
3
3
INA+
OUTB
INB-
7
8
10
11
12
16
15
14
—
—
—
—
1
7
7
6
9
6
6
Amplifier B Inverting Input
Amplifier B Noninverting Input
Amplifier C Output
5
10
14
13
12
—
—
—
—
1
5
5
INB+
OUTC
INC-
INC+
OUTD
IND-
IND+
EN
—
—
—
—
—
—
—
—
—
—
8
10
11
12
16
15
14
—
—
—
—
9
Amplifier C Inverting Input
Amplifier C Noninverting Input
Amplifier D Output
10
14
13
12
—
—
—
—
Amplifier D Inverting Input
Amplifier D Noninverting Input
Enable Amplifier
ENA
ENB
Enable Amplifier A
3
3
Enable Amplifier B
2
2
ENC
Enable Amplifier C
_______________________________________________________________________________________
9
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
cuit formed by the parasitic feedback capacitance and
inductance.
_______________De t a ile d De s c rip t io n
The MAX4012/MAX4016/MAX4018/MAX4020 are sin-
gle-supply, rail-to-rail, voltage-feedback amplifiers that
e mp loy c urre nt-fe e d b a c k te c hniq ue s to a c hie ve
600V/µs slew rates and 200MHz bandwidths. Excellent
harmonic distortion and differential gain/phase perfor-
mance make these amplifiers an ideal choice for a wide
variety of video and RF signal-processing applications.
Inverting and Noninverting Configurations
Select the gain-setting feedback (R ) and input (R )
F
G
resistor values to fit your application. Large resistor val-
ues increase voltage noise and interact with the amplifi-
e r’s inp ut a nd PC b oa rd c a p a c ita nc e . This c a n
generate undesirable poles and zeros and decrease
bandwidth or cause oscillations. For example, a nonin-
The output voltage swing comes to within 50mV of each
supply rail. Local feedback around the output stage
assures low open-loop output impedance to reduce
gain sensitivity to load variations. This feedback also
produces demand-driven current bias to the output
transistors for ±120mA drive capability, while constrain-
ing total supply current to less than 7mA. The input
stage permits common-mode voltages beyond the nega-
tive supply and to within 2.25V of the positive supply rail.
verting gain-of-two configuration (R = R ) using 1kΩ
F
G
resistors, combined with 1pF of amplifier input capaci-
tance and 1pF of PC board capacitance, causes a pole
at 159MHz. Since this pole is within the amplifier band-
width, it jeopardizes stability. Reducing the 1kΩ resis-
tors to 100Ω extends the pole frequency to 1.59GHz,
but could limit output swing by adding 200Ω in parallel
with the amplifier’s load resistor. Table 1 shows sug -
gested feedback, gain resistors, and bandwidth for
s e ve ra l g a in va lue s in the c onfig ura tions s hown in
Figures 1a and 1b.
__________Ap p lic a t io n s In fo rm a t io n
Ch o o s in g Re s is t o r Va lu e s
La yo u t a n d P o w e r-S u p p ly Byp a s s in g
These amplifiers operate from a single +3.3V to +11V
power supply or from dual supplies to ±5.5V. For single-
Unity-Gain Configuration
The MAX4012/MAX4016/MAX4018/MAX4020 are inter-
nally compensated for unity gain. When configured for
supply operation, bypass V
to ground with a 0.1µF
CC
unity gain, the devices require a 24Ω resistor (R ) in
F
capacitor as close to the pin as possible. If operating with
dual supplies, bypass each supply with a 0.1µF capacitor.
series with the feedback path. This resistor improves
AC response by reducing the Q of the parallel LC cir-
R
F
R
F
R
G
R
G
IN
618/MAX420
R
TIN
R
TO
R
TO
V
OUT
V
OUT
MAX40_ _
MAX40_ _
V
IN
R
O
R
O
V
= [1+ (R / R )] V
F G IN
= -(R / R ) V
IN
OUT
OUT
F
G
R
S
R
TIN
Figure 1a. Noninverting Gain Configuration
Figure 1b. Inverting Gain Configuration
10 ______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
Maxim recommends using microstrip and stripline tech-
niques to obtain full bandwidth. To ensure that the PC
board does not degrade the amplifier’s performance,
design it for a frequency greater than 1GHz. Pay care-
ful attention to inputs and outputs to avoid large para-
sitic capacitance. Whether or not you use a constant-
impedance board, observe the following guidelines
when designing the board:
The outp ut s wing s to within 60mV of e ithe r p owe r-
supply rail with a 2kΩ load. The input ground-sensing
and the rail-to-rail output substantially increase the
dynamic range. With a symmetric input in a single +5V
application, the input can swing 2.95Vp-p, and the out-
put can swing 4.9Vp-p with minimal distortion.
En a b le In p u t a n d Dis a b le d Ou t p u t
The enable feature (EN_) allows the amplifier to be
placed in a low-power, high-output-impedance state.
• Don’t use wire-wrap boards because they are too
inductive.
Typically, the EN_ logic low input current (I ) is small.
IL
• Don’t use IC sockets because they increase parasitic
capacitance and inductance.
However, as the EN voltage (V ) approaches the nega-
IL
tive supply rail, I increases (Figure 2). A single resis-
IL
tor connected as shown in Figure 3 prevents the rise in
the logic-low input current. This resistor provides a
• Use surface-mount instead of through-hole compo-
nents for better high-frequency performance.
feedback mechanism that increases V as the logic
IL
• Use a PC board with at least two layers; it should be
as free from voids as possible.
input is brought to V . Figure 4 shows the resulting
EE
input current (I ).
IL
• Keep signal lines as short and as straight as possi-
ble. Do not make 90° turns; round all corners.
When the MAX4018 is disabled, the amplifier’s output
impedance is 35kΩ. This high resistance and the low
2p F outp ut c a p a c ita nc e ma ke this p a rt id e a l in
RF/video multiplexer or switch applications. For larger
arrays, pay careful attention to capacitive loading. See
the Output Capacitive Loading and Stability section for
more information.
Ra il-t o -Ra il Ou t p u t s ,
Gro u n d -S e n s in g In p u t
The inp ut c ommon-mod e ra ng e e xte nd s from
(V - 200mV) to (V - 2.25V) with excellent common-
EE
CC
mode rejection. Beyond this range, the amplifier output
is a nonlinear function of the input, but does not under-
go phase reversal or latchup.
Table 1. Recommended Component Values
GAIN (V/V)
COMPONENT
+1
24
∞
-1
500
500
0
+2
500
500
—
-2
500
250
0
+5
500
124
—
-5
500
100
0
+10
500
56
-10
500
50
0
+25
500
20
-25
1200
50
R
R
R
R
R
(Ω)
(Ω)
(Ω)
F
G
S
—
—
—
0
∞
∞
(Ω)
(Ω)
49.9
49.9
200
56
49.9
49.9
105
62
49.9
49.9
25
100
49.9
33
49.9
49.9
11
49.9
49.9
6
TIN
TO
49.9
90
49.9
60
49.9
25
49.9
10
Small-Signal -3dB Bandwidth (MHz)
Note: = R + R ; R and R
R
are calculated for 50Ω applications. For 75Ω systems, R
TO
= 75Ω; calculate R from the
TIN
L
O
TO
TIN
TO
following equation:
75
R
=
Ω
TIN
75
1-
R
G
______________________________________________________________________________________ 11
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
20
0
ENABLE
-20
-40
10k
EN_
IN-
-60
-80
OUT
MAX40_ _
IN+
-100
-120
-140
-160
0
50 100 150 200 250 300 350 400 450 500
mV ABOVE V
Figure 3. Circuit to Reduce Enable Logic-Low Input Current
EE
To implement the mux function, the outputs of multiple
amplifiers can be tied together, and only the amplifier
with the selected input will be enabled. All of the other
amplifiers will be placed in the low-power shutdown
mode, with their high output impedance presenting
very little load to the active amplifier output. For gains
of +2 or greater, the feedback network impedance of
all the amplifiers used in a mux application must be
c ons id e re d whe n c a lc ula ting the tota l loa d on the
active amplifier output
Figure 2. Enable Logic-Low Input Current vs. V
IL
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
Ou t p u t Ca p a c it ive Lo a d in g a n d S t a b ilit y
The MAX4012/MAX4016/MAX4018/MAX4020 are opti-
mized for AC performance. They are not designed to
drive highly reactive loads, which decreases phase
margin and may produce excessive ringing and oscilla-
tion. Figure 5 shows a circuit that eliminates this prob-
lem. Figure 6 is a graph of the optimal isolation resistor
(R ) vs. capacitive load. Figure 7 shows how a capaci-
S
0
50 100 150 200 250 300 350 400 450 500
tive load causes excessive peaking of the amplifier’s
frequency response if the capacitor is not isolated from
the amplifier by a resistor. A small isolation resistor
(usually 20Ω to 30Ω) placed before the reactive load
prevents ringing and oscillation. At higher capacitive
loads, AC performance is controlled by the interaction
of the loa d c a p a c ita nc e a nd the is ola tion re s is tor.
Figure 8 shows the effect of a 27Ω isolation resistor on
closed-loop response.
mV ABOVE V
EE
618/MAX420
Figure 4. Enable Logic-Low Input Current vs. V with 10kΩ
IL
Series Resistor
Coaxial cable and other transmission lines are easily
driven when properly terminated at both ends with their
c ha ra c te ris tic imp e d a nc e . Driving b a c k-te rmina te d
tra ns mis s ion line s e s s e ntia lly e limina te s the line ’s
capacitance.
12 ______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
30
25
R
F
R
G
20
15
10
5
R
ISO
V
OUT
MAX40_ _
V
C
IN
L
50Ω
R
TIN
0
0
50
100
150
200
250
CAPACITIVE LOAD (pF)
Figure 5. Driving a Capacitive Load through an Isolation Resistor
Figure 6. Capacitive Load vs. Isolation Resistance
6
5
3
R
ISO
= 27Ω
2
1
C = 47pF
L
C = 15pF
L
4
3
0
C = 68pF
L
C = 10pF
L
2
-1
-2
-3
-4
-5
-6
-7
1
C = 120pF
L
0
C = 5pF
L
-1
-2
-3
-4
100k
1M
10M
100M
1G
100k
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 7. Small-Signal Gain vs. Frequency with Load
Capacitance and No Isolation Resistor
Figure 8. Small-Signal Gain vs. Frequency with Load
Capacitance and 27Ω Isolation Resistor
______________________________________________________________________________________ 13
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
_____________________________________________P in Co n fig u ra t io n s (c o n t in u e d )
TOP VIEW
OUTC
OUTD
14
ENA 1
14
OUTA 1
2
3
4
5
6
2
3
4
5
6
7
ENC
ENB
13 INC-
12 INC+
INA-
13 IND-
12 IND+
INA+
V
CC
11
10
9
V
V
CC
11
10
9
V
EE
MAX4018
MAX4020
EE
INB+
INB-
INC+
INC-
INA+
INA-
INB+
INB-
OUTB
OUTC
OUTA 7
8
OUTB
8
SO
SO
OUTA
INA-
8
7
6
5
V
CC
1
2
3
4
OUTB
INB-
MAX4016
INA+
V
EE
INB+
SO/µMAX
1
2
3
4
5
6
7
8
16 OUTC
ENA
ENC
ENB
1
2
3
4
5
6
7
8
16 OUTD
OUTA
INA-
INC-
15
14
13
IND-
15
14
INC+
IND+
INA+
V
EE
V
CC
MAX4018
V
V
CC
MAX4020
13
12
EE
12 INB+
INA+
INA-
INC+
INC-
INB+
INB-
INB-
11
10
9
11
10
9
OUTB
N.C.
OUTA
N.C.
OUTC
N.C.
OUTB
N.C.
618/MAX420
QSOP
QSOP
14 ______________________________________________________________________________________
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
618/MAX420
_Ord e rin g In fo rm a t io n (c o n t in u e d )
___________________Ch ip In fo rm a t io n
SOT
TOP
MARK
TRANSISTOR
TEMP.
RANGE
PIN-
PACKAGE
PART
PART
COUNT
MAX4012
MAX4016
MAX4018
MAX4020
95
MAX4018ESD
MAX4018EEE
MAX4020ESD
MAX4020EEE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
14 SO
—
—
—
—
190
299
362
16 QSOP
14 SO
16 QSOP
________________________________________________________P a c k a g e In fo rm a t io n
______________________________________________________________________________________ 15
Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly
Op Am p s w it h Ra il-t o -Ra il Ou t p u t s
___________________________________________P a c k a g e In fo rm a t io n (c o n t in u e d )
618/MAX420
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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