MAX4270ESD-T [MAXIM]
Operational Amplifier, 2 Func, 9000uV Offset-Max, BIPolar, PDSO14, 0.150 INCH, MS-012, SOIC-14;
| 型号： | MAX4270ESD-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Operational Amplifier, 2 Func, 9000uV Offset-Max, BIPolar, PDSO14, 0.150 INCH, MS-012, SOIC-14 放大器 光电二极管 |
| 文件： | 总19页 (文件大小：483K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1552; Rev 2; 8/00
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
General Description
Features
The MAX4265–MAX4270 ultra-low distortion, voltage-feed-
back op amps are capable of driving a 100 load while
maintaining ultra-low distortion over a wide bandwidth.
They offer superior spurious-free dynamic range (SFDR)
performance: -90dBc at 5MHz and -59dBc at 100MHz
(MAX4269). Additionally, input voltage noise density is
8nV/ Hz while operating from a single +4.5V to +8.0V sup-
ply or from dual 2.25V to 4.0V supplies. These features
make the MAX4265–MAX4270 ideal for use in high-perfor-
mance communications and signal-processing applica-
tions that require low distortion and wide bandwidth.
ꢀ Operates from +4.5V to +8.0V
ꢀ Superior SFDR with 100 Load
-90dBc (f = 5MHz )
C
-59dBc (f = 100MHz)
C
ꢀ 35dBm IP3 (f = 20MHz)
C
ꢀ 8nV/ Hz Voltage Noise Density
ꢀ 100MHz 0.1dB Gain Flatness (MAX4268)
ꢀ 900V/µs Slew Rate
ꢀ
45mA Output Driꢀing Capaꢁility
The MAX4265 single and MAX4268 dual amplifiers are
unity-gain stable. The MAX4266 single and MAX4269 dual
amplifiers are compensated for a minimum stable gain of
+2V/V, while the MAX4267 single and MAX4270 dual
amplifiers are compensated for a minimum stable gain of
+5V/V.
ꢀ Disaꢁle Mode Places Outputs in High-Impedance
State
For additional power savings, these amplifiers feature a
low-power disable mode that reduces supply current and
places the outputs in a high-impedance state. The
MAX4265/MAX4266/MAX4267 are available in a space-
saving 8-pin µMAX package, and the MAX4268/
MAX4269/MAX4270 are available in a 16-pin QSOP pack-
age.
Ordering Information
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
PIN-PACKAGE
8 µMAX
8 SO
MAX4265EUA
MAX4265ESA
MAX4266EUA
MAX4266ESA
MAX4267EUA
MAX4267ESA
MAX4268EEE
MAX4268ESD
MAX4269EEE
MAX4269ESD
MAX4270EEE
MAX4270ESD
8 µMAX
8 SO
Applications
8 µMAX
8 SO
Base-Station Amplifiers
IF Amplifiers
16 QSOP
14 SO
High-Frequency ADC Drivers
High-Speed DAC Buffers
RF Telecom Applications
High-Frequency Signal Processing
16 QSOP
14 SO
16 QSOP
14 SO
Pin Configurations appear at end of data sheet.
Selector Guide
NO. OF
OP AMPS
MIN GAIN
(V/V)
-3dB
GBP
(MHz)
400
700
1500
300
FULL-POWER
BANDWIDTH (MHz)
PART
BANDWIDTH (MHz)
MAX4265
MAX4266
MAX4267
MAX4268
MAX4269
MAX4270
1
1
1
2
2
2
1
2
5
1
2
5
400
350
300
300
350
200
270
350
300
175
200
200
700
1000
________________________________________________________________ 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.
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
to V )...............................................+8.5V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
EE
Voltage on Any Other Pin.................(V - 0.3V) to (V
+ 0.3V)
EE
CC
Short-Circuit Duration (V
to V
or V )..............Continuous
CC EE
OUT
Continuous Power Dissipation (T = +70°C)
A
8-Pin µMAX (derate 4.10mW/°C above +70°C)..........330mW
16-Pin QSOP (derate 8.33mW/°C above +70°C)........667mW
8-Pin SO (derate 5.9mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C).............667mW
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.
DC ELECTRICAL CHARACTERISTICS
(V = +5V, V = 0, R = 100 to V /2, V
= V /2, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
EE
L
CC
CM
CC
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Range
V
Inferred from PSRR test
Inferred from CMRR test
4.5
8.0
V
CC
Common-Mode Input Voltage
Input Offset Voltage
V
CM
V
+ 1.6
V
- 1.6
9
V
EE
CC
V
1
mV
OS
Input Offset Voltage Drift
TCV
1.5
µV/°C
OS
Input Offset Voltage Channel
Matching
MAX4268/MAX4269/MAX4270
1
mV
Input Bias Current
Input Offset Current
I
3.5
0.1
40
6
µA
µA
B
I
OS
Common-Mode Input
Resistance
R
Either input (V + 1.6V)
V
CM
(V - 1.6V)
CC
1
M
INCM
EE
Differential Input Resistance
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Open-Loop Voltage Gain
Output Voltage Swing
R
-10mV
V
10mV
40
85
k
INDIFF
IN
CMRR
PSRR
(V + 1.6V)
EE
V
CM
(V
- 1.6V), no load
60
60
60
dB
dB
dB
V
CC
V
CC
= 4.5V to 8.0V
85
A
1.75V
- V , V - V
EE
V
OUT
3.25V
95
OL
V
V
CC
1.1
45
1.5
OUT
OUT
OH OL
Output Current Drive
I
R = 20
L
30
mA
mA
Output Short-Circuit Current
Closed-Loop Output Resistance
Power-Up Time
I
Sinking or sourcing to V
or V
100
0.035
10
SC
CC
EE
R
OUT
t
V
OUT
= 1V step, 0.1% settling time
µs
PWRUP
28
32
5
Normal mode, DISABLE_ = V
or floating
CC
Quiescent Supply Current
(per amplifier)
I
S
mA
1.6
0.2
Disable mode, DISABLE_ = V
EE
Disable Output Leakage Current
DISABLE_ Logic Low
2.5
- 3.5
µA
V
DISABLE_ = V , V
V
OUT
V
CC
EE EE
V
CC
V
CC
- 1.5
V
DISABLE_ Logic High
DISABLE_ Logic Input Low
Current
5
1
100
30
µA
µA
DISABLE_ = V
EE
DISABLE_ Logic Input High
Current
DISABLE_ = V
CC
2
_______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
AC ELECTRICAL CHARACTERISTICS
(V
= +5V, V
= 0, R = 100 to V /2, V
= V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
, unless otherwise noted. Typical values are at T = +25°C.)
CC
EE
L
CC
CM CC V V
MAX4267/MAX4270 A = +5V/V, T = T
to T
V
A
MIN
MAX A
PARAMETER
SYMBOL
CONDITIONS
MAX4265
MIN
TYP
400
350
300
300
350
200
270
350
300
175
200
200
80
MAX
UNITS
MAX4266
MAX4267
MAX4268
MAX4269
MAX4270
MAX4265
MAX4266
MAX4267
MAX4268
MAX4269
MAX4270
MAX4265
MAX4266
MAX4267
MAX4268
MAX4269
MAX4270
Small-Signal -3dB Bandwidth
Full-Power Bandwidth
0.1dB Gain Flatness
BW
V
OUT
V
OUT
V
OUT
= 100mVp-p
MHz
-3dB
FPBW
= 1Vp-p
MHz
MHz
30
55
BW
= 100mVp-p
0.1dB
100
35
35
All-Hostile Crosstalk
Slew Rate
f = 10MHz
85
dB
V/µs
ns
SR
t , t
V
V
V
= +1V step
= +1V step
= +1V step
900
1
OUT
OUT
OUT
Rise/Fall Times
Settling Time (0.1%)
R
F
t
15
ns
S,0.1
f
f
f
f
f
f
f
f
f
f
f
f
= 1MHz
83
C
C
C
C
C
C
C
C
C
C
C
C
= 5MHz
85
V
= 1Vp-p
OUT
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
87
(MAX4265/
MAX4266/
MAX4267)
81
50
47
Spurious-Free
Dynamic Range
SFDR
dBc
85
= 5MHz
85
= 10MHz
= 20MHz
= 60MHz
= 100MHz
84
V
= 1Vp-p
OUT
(MAX4268)
79
68
60
_______________________________________________________________________________________
3
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
AC ELECTRICAL CHARACTERISTICS (continued)
(V
= +5V, V
= 0, R = 100 to V /2, V
= V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
, unless otherwise noted. Typical values are at T = +25°C.)
CC
EE
L
CC
CM CC V V
MAX4267/MAX4270 A = +5V/V, T = T
to T
V
A
MIN
MAX A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
88
90
88
79
68
59
86
81
75
68
60
56
83
85
87
81
50
MAX
UNITS
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
= 1MHz
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
V
= 1Vp-p
OUT
(MAX4269)
Spurious-Free
Dynamic Range
SFDR
dBc
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
V
= 1Vp-p
OUT
(MAX4270)
= 5MHz
V
= 1Vp-p
OUT
= 10MHz
= 20MHz
= 60MHz
(MAX4265/
MAX4266/
MAX4267)
f
f
= 100MHz
= 1MHz
47
85
C
C
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
= 5MHz
85
84
79
68
60
88
90
88
79
68
59
86
81
75
68
60
56
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
V
= 1Vp-p
OUT
(MAX4268)
Second Harmonic
Distortion
dBc
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
V
= 1Vp-p
OUT
(MAX4269)
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
V
= 1Vp-p
OUT
(MAX4270)
4
_______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
AC ELECTRICAL CHARACTERISTICS (continued)
(V
= +5V, V
= 0, R = 100 to V /2, V
= V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
, unless otherwise noted. Typical values are at T = +25°C.)
CC
EE
L
CC
CM CC V V
MAX4267/MAX4270 A = +5V/V, T = T
to T
V
A
MIN
MAX A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
98
96
91
85
75
61
95
95
93
86
72
64
88
90
88
79
68
59
96
97
91
84
74
69
32
35
35
MAX
UNITS
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
= 1MHz
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
= 5MHz
V
= 1Vp-p
OUT
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
(MAX4265/
MAX4266/
MAX4267)
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
V
= 1Vp-p
OUT
(MAX4268)
Third Harmonic
Distortion
dBc
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
= 1MHz
V
= 1Vp-p
OUT
(MAX4269)
= 5MHz
= 10MHz
= 20MHz
= 60MHz
= 100MHz
V
= 1Vp-p
OUT
(MAX4270)
MAX4265/MAX4268
MAX4266/MAX4269
MAX4267/MAX4270
V
= 1Vp-p,
= 20MHz,
OUT
Two-Tone, Third-Order
Intercept Distortion
IP3
dBm
f
f
CA
CB
= 21.25MHz
_______________________________________________________________________________________
5
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
AC ELECTRICAL CHARACTERISTICS (continued)
(V
= +5V, V
= 0, R = 100 to V /2, V
= V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
, unless otherwise noted. Typical values are at T = +25°C.)
CC
EE
L
CC
CM CC V V
MAX4267/MAX4270 A = +5V/V, T = T
to T
V
A
MIN
MAX A
PARAMETER
Input -1dB Compression Point
Differential Gain
SYMBOL
CONDITIONS
MIN
TYP
12
MAX
UNITS
dBm
%
f
= 20MHz
C
D
NTSC, f = 3.58MHz, R = 150 to V /2
0.015
0.03
2
G
L
CC
Differential Phase
D
NTSC, f = 3.58MHz, R = 150 to V /2
degrees
pF
P
L
CC
Input Capacitance
Output Impedance
Disabled Output Capacitance
Enable Time
C
IN
R
t
f = 10MHz
1
OUT
DISABLE_ = V
5
pF
ns
µs
EE
t
V
V
= +1V
= +1V
100
750
15
EN
IN
IN
Disable Time
DIS
MAX4265/MAX4268
MAX4266/MAX4269
MAX4267/MAX4270
No sustained
oscillation
pF
15
Capacitive Load Stability
22
Input Voltage Noise Density
Input Current Noise Density
e
n
8
f = 1kHz
f = 1kHz
nV/ Hz
pA/ Hz
i
n
1
Typical Operating Characteristics
(V
CC
= +5V, V = 0, DISABLE_ = +5V, R = 100 to V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
EE
L
CC
V
V
MAX4267/MAX4270 A = +5V/V, T = +25°C, unless otherwise noted.)
V
A
MAX4268/MAX4269/MAX4270
LARGE-SIGNAL GAIN
MAX4268/MAX4269/MAX4270
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4268/MAX4269/MAX4270
GAIN FLATNESS vs. FREQUENCY
vs. FREQUENCY
4
4
0.4
V
= 100mVp-p
OUT
V
= 1Vp-p
OUT
3
2
3
2
0.3
0.2
MAX4268
1
MAX4268
1
0.1
MAX4268
MAX4269
0
0
0
-1
-2
-3
-4
-1
-2
-3
-4
-0.1
-0.2
-0.3
-0.4
MAX4269
MAX4270
MAX4269
MAX4270
MAX4270
-5
-6
-5
-6
-0.5
-0.6
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
0.1M
1M
10M
100M
1G
0.1M
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
6
_______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Typical Operating Characteristics (continued)
(V
CC
= +5V, V = 0, DISABLE_ = +5V, R = 100 to V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
EE
L
CC
V
V
MAX4267/MAX4270 A = +5V/V, T =+25°C, unless otherwise noted.)
V
A
MAX4265/MAX4266/MAX4267
GAIN FLATNESS vs. FREQUENCY
MAX4265/MAX4266/MAX4267
LARGE-SIGNAL GAIN vs. FREQUENCY
MAX4265/MAX4266/MAX4267
SMALL-SIGNAL GAIN vs. FREQUENCY
0.4
4
4
3
V
= 1Vp-p
OUT
0.3
0.2
3
2
MAX4265
MAX4266
2
MAX4265
MAX4265
0.1
1
1
0
0
0
-0.1
-0.2
-0.3
-0.4
-1
-2
-3
-4
-1
-2
-3
-4
MAX4266
MAX4267
MAX4266
MAX4267
MAX4267
-0.5
-0.6
-5
-6
-5
-6
0.1M
1M
10M
100M
1G
0.1M
1M
10M
100M
1G
0.1M
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX4265/MAX4266/MAX4267
DISTORTION vs. FREQUENCY
MAX4269
DISTORTION vs. FREQUENCY
MAX4268
DISTORTION vs. FREQUENCY
-20
-30
-40
-20
-20
-30
-40
V
= 1Vp-p
OUT
V
= 1Vp-p
V
= 1Vp-p
OUT
OUT
-30
-40
-50
-60
-50
-60
-50
-60
-70
-80
-70
-80
-70
-80
2ND HARMONIC
3RD HARMONIC
2ND HARMONIC
2ND HARMONIC
3RD HARMONIC
-90
-90
-90
3RD HARMONIC
1
-100
-100
-100
0.1
10
100
0.1
1
10
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4265/MAX4266/MAX4267
DISTORTION vs. LOAD RESISTANCE
MAX4268
DISTORTION vs. LOAD RESISTANCE
MAX4270
DISTORTION vs. FREQUENCY
-20
-30
-40
-50
-60
-70
-80
-90
-100
-20
-20
-30
-40
-50
-60
-70
-80
-90
-100
f
= 5MHz
OUT
O
V
V
OUT
= 1Vp-p
f = 5MHz
O
OUT
= 1V
p-p
V
= 1Vp-p
-30
-40
-50
-60
-70
-80
2ND HARMONIC
3RD HARMONIC
1
2ND HARMONIC
3RD HARMONIC
200 300
2ND HARMONIC
3RD HARMONIC
200 300
-90
-100
0
100
400
500
600
0
100
400
500
600
0.1
10
100
R
( )
R
LOAD
( )
FREQUENCY (MHz)
LOAD
_______________________________________________________________________________________
7
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Typical Operating Characteristics (continued)
(V
CC
= +5V, V = 0, DISABLE_ = +5V, R = 100 to V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
EE
L
CC
V
V
MAX4267/MAX4270 A = +5V/V, T =+25°C, unless otherwise noted.)
V
A
MAX4270
DISTORTION vs. LOAD RESISTANCE
MAX4269
DISTORTION vs. LOAD RESISTANCE
MAX4265/MAX4266/MAX4267
DISTORTION vs. VOLTAGE SWING
-20
-30
-40
-50
-60
-70
-80
-90
-100
-20
-30
-40
-50
-60
-70
-80
-90
-100
-20
-30
-40
-50
-60
-70
-80
-90
-100
f = 5MHz
O
f
= 5MHz
OUT
f
= 5MHz
OUT
O
V
O
V
= 1Vp-p
= 1Vp-p
2ND HARMONIC
3RD HARMONIC
200 300
2ND HARMONIC
3RD HARMONIC
2ND HARMONIC
3RD HARMONIC
0
100
400
500
600
0
100
200
300
400
500
600
0
0.5
1.0
1.5
2.0
2.5
R
( )
R
(
)
VOLTAGE SWING (V)
LOAD
LOAD
MAX4268
DISTORTION vs. VOLTAGE SWING
MAX4269
DISTORTION vs. VOLTAGE SWING
MAX4270
DISTORTION vs. VOLTAGE SWING
-20
-30
-40
-50
-60
-70
-80
-90
-100
-20
-30
-40
-50
-60
-70
-80
-90
-100
-20
-30
-40
-50
-60
-70
-80
-90
-100
f
= 5MHz
f
= 5MHz
f = 5MHz
O
O
O
2ND HARMONIC
3RD HARMONIC
2ND HARMONIC
2ND HARMONIC
3RD HARMONIC
3RD HARMONIC
0
0.5
1.0
1.5
2.0
2.5
0
0.5
1.0
1.5
2.0
2.5
0
0.5
1.0
1.5
2.0
2.5
VOLTAGE SWING (Vp-p)
VOLTAGE SWING (Vp-p)
VOLTAGE SWING (Vp-p)
SPURIOUS-FREE DYNAMIC RANGE
vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TWO-TONE THIRD-ORDER
INTERCEPT vs. FREQUENCY
0.1
-20
-30
-40
60
55
50
V
= 1Vp-p
V
= 1Vp-p
OUT
OUT
MAX4266/MAX4269
-50
-60
45
40
MAX4267/MAX4270
0.01
MAX4270
-70
-80
35 MAX4267/MAX4270
MAX4269
30
25
20
MAX4265/MAX4268
10
MAX4265/MAX4268
10
MAX4266/MAX4269
1
-90
MAX4268
10
0.001
-100
0.1
100
0.1
1
100
0.1
1
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
8
_______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Typical Operating Characteristics (continued)
(V
CC
= +5V, V = 0, DISABLE_ = +5V, R = 100 to V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
EE
L
CC
V
V
MAX4267/MAX4270 A = +5V/V, T =+25°C, unless otherwise noted.)
V
A
MAX4268/MAX4269/MAX4270
CROSSTALK vs. FREQUENCY
VOLTAGE NOISE vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
0
-20
1000
100
10
100
10
1
-40
-60
1
-80
0.1
-100
-120
0.01
0.1M
0.1M
1M
10M
100M
1G
10
1
100
1k
10k 100k 1M 10M
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX4267/MAX4270
DIFFERENTIAL GAIN AND PHASE
MAX4265/MAX4268
DIFFERENTIAL GAIN AND PHASE
MAX4266/MAX4269
DIFFERENTIAL GAIN AND PHASE
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
0.020
0.015
0.010
0.005
0.000
-0.005
0.020
0.010
0.000
-0.010
-0.020
-0.030
10
IRE
100
10
10
IRE
100
10
10
IRE
100
0.010
0.000
0.04
0.03
0.02
0.01
0.00
-0.01
0.012
0.008
0.004
0.000
-0.004
-0.008
-0.010
-0.020
-0.030
IRE
100
IRE
100
10
R = 150
IRE
100
R = 150
L
R = 150
L
L
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
OUTPUT VOLTAGE SWING
vs. RESISTIVE LOAD RESISTANCE
0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-10
-10
-20
V
OH
-20
-30
-40
-50
-60
-70
-80
-30
-40
-50
-60
-70
-80
V
OL
-90
-100
-90
0
0
0.1M
1M
10M
100M
1G
10k
100k
1M
10M
100M
1G
200
400
600
)
800
1000
FREQUENCY (Hz)
FREQUENCY (Hz)
R
(
LOAD
_______________________________________________________________________________________
9
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Typical Operating Characteristics (continued)
(V
CC
= +5V, V = 0, DISABLE_ = +5V, R = 100 to V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
EE
L
CC
V
V
MAX4267/MAX4270 A = +5V/V, T =+25°C, unless otherwise noted.)
V
A
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
POWER-UP/POWER-DOWN RESPONSE
DISABLE/ENABLE RESPONSE
MAX4265/70-31
MAX4265/70-32
-0.90
-0.95
-1.00
-1.05
-1.10
-1.15
-1.20
5V
0V
5V
0V
5 s/div
250ns/div
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
SUPPLY VOLTAGE (V)
INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
SUPPLY CURRENT (PER AMPLIFIER)
vs. SUPPLY VOLTAGE
-5.0
-4.5
-4.0
-3.5
-3.0
5
4
3
2
1
35
34
33
32
31
-2.5
-2.0
-1.5
0
-1
-2
30
29
28
-1.0
-0.5
0
-3
-4
-5
27
26
25
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
SUPPLY VOLTAGE (V)
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE ( C)
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
SUPPLY VOLTAGE (V)
INPUT OFFSET CURRENT
vs. TEMPERATURE
SUPPLY CURRENT (PER AMPLIFIER)
vs. TEMPERATURE
INPUT BIAS CURRENT vs. TEMPERATURE
500
400
300
200
100
-5
-4
-3
-2
-1
0
35
34
33
32
31
0
-100
-200
30
29
28
-300
-400
-500
27
26
25
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE ( C)
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE ( C)
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE ( C)
10 ______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Typical Operating Characteristics (continued)
(V
CC
= +5V, V = 0, DISABLE_ = +5V, R = 100 to V /2, MAX4265/MAX4268 A = +1V/V, MAX4266/MAX4269 A = +2V/V,
EE
L
CC
V
V
MAX4267/MAX4270 A = +5V/V, T =+25°C, unless otherwise noted.)
V
A
MAX4265/MAX4268
SMALL-SIGNAL PULSE RESPONSE
MAX4266/MAX4269
SMALL-SIGNAL PULSE RESPONSE
VOLTAGE SWING vs. TEMPERATURE
5
4
3
V
OH
INPUT
50mV/div
INPUT
25mV/div
2
1
0
OUTPUT
50mV/div
OUTPUT
50mV/div
V
OL
5ns/div
5ns/div
-50 -35 -20 -5 10 25 40 55 70 85
TEMPERATURE ( C)
MAX4267/MAX4270
SMALL-SIGNAL PULSE RESPONSE
MAX4265/MAX4268
LARGE-SIGNAL PULSE RESPONSE
INPUT
10mV/div
INPUT
500mV/div
OUTPUT
50mV/div
OUTPUT
500mV/div
5ns/div
5ns/div
MAX4267/MAX4270
LARGE-SIGNAL PULSE RESPONSE
MAX4266/MAX4269
LARGE-SIGNAL PULSE RESPONSE
INPUT
100mV/div
INPUT
250mV/div
OUTPUT
500mV/div
OUTPUT
500mV/div
5ns/div
5ns/div
______________________________________________________________________________________ 11
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Pin Description
PIN
MAX4265
MAX4266
MAX4267
MAX4268
MAX4269
MAX4270
NAME
FUNCTION
8 µMAX/SO
14 SO
16 QSOP
—
1
—
2
—
4, 5
—
Disable Input. Active low.
DISABLE
DISABLEA, DISABLEB
IN-
4, 5
Disable Input. Active low.
Inverting Input
—
—
3
2, 9
—
2, 11
—
INA-, INB-
IN+
Inverting Input
Noninverting Input
Noninverting Input
Negative Power Supply
Amplifier Output
—
4, 5
6
3, 10
6, 7
—
3, 12
6, 7
INA+, INB+
V
EE
—
OUT
—
7, 8
—
1, 8
13, 14
11, 12
1, 10
15, 16
8, 9, 13, 14
OUTA, OUTB
Amplifier Output
V
CC
Positive Power Supply. Connect to a +4.5V to +8.0V supply.
No Connection. Not internally connected.
N.C.
• Choose the proper feedback-resistor and gain-resis-
tor values for the application. In general, the smaller
the closed-loop gain, the smaller the THD generated,
especially when driving heavy resistive loads. Large-
value feedback resistors can significantly improve
distortion. The MAX4265–MAX4270’s THD normally
increases at approximately 20dB per decade at fre-
quencies above 1MHz; this is a lower rate than that of
comparable dual-supply op amps.
Detailed Description
The MAX4265–MAX4270 family of operational ampli-
fiers features ultra-low distortion and wide bandwidth.
Their low distortion and low noise make them ideal for
driving high-speed ADCs up to 16 bits in telecommuni-
cations applications and high-performance signal pro-
cessing.
These devices can drive a 100 load and deliver 45mA
while maintaining DC accuracy and AC performance.
• Operating the device near or above the full-power
bandwidth significantly degrades distortion (see the
Total Harmonic Distortion vs. Frequency graph in the
Typical Operating Characteristics).
The input common-mode voltage ranges from (V
+
EE
1.6V) to (V
- 1.6V), while the output typically swings
CC
to within 1.1V of the rails.
Low Distortion
• The decompensated devices (MAX4266/MAX4267/
MAX4269/MAX4270) deliver the best distortion per-
formance since they have a slightly higher slew rate
and provide a higher amount of loop gain for a given
closed-loop gain setting.
The MAX4265–MAX4270 use proprietary bipolar tech-
nology to achieve minimum distortion in low-voltage
systems. This feature is typically available only in dual-
supply op amps.
Several factors can affect the noise and distortion that a
device contributes to the input signal. The following
guidelines explain how various design choices impact
the total harmonic distortion (THD):
12 ______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Choosing Resistor Values
Driving Capacitive Loads
The MAX4265–MAX4270 are not designed to drive
highly reactive loads. Stability is maintained with loads
up to 15pF with less than 2dB peaking in the frequency
response. To drive higher capacitive loads, place a
small isolation resistor in series between the amplifier’s
output and the capacitive load (Figure 1). This resistor
improves the amplifier’s phase margin by isolating the
capacitor from the op amp’s output.
Unity-Gain Configurations
The MAX4265 and MAX4268 are internally compensat-
ed for unity gain. When configured for unity gain, they
require a small resistor (R ) in series with the feedback
F
path (Figure 1). This resistor improves AC response by
reducing the Q of the tank circuit, which is formed by
parasitic feedback inductance and capacitance.
To ensure a load capacitance that limits peaking to less
than 2dB, select a resistance value from Figure 2. For
example, if the capacitive load is 100pF, the corre-
sponding isolation resistor is 6 (MAX4266/MAX4269).
Figures 3 and 4 show the peaking that occurs in the fre-
quency response with and without an isolation resistor.
Inverting and Noninverting Configurations
The values of the gain-setting feedback and input resis-
tors are important design considerations. Large resistor
values will increase voltage noise and interact with the
amplifier’s input and PC board capacitance to generate
undesirable poles and zeros, which can decrease
bandwidth or cause oscillations. For example, a nonin-
Coaxial cable and other transmission lines are easily
driven when terminated at both ends with their charac-
teristic impedance. When driving back-terminated
transmission lines, the capacitive load of the transmis-
sion line is essentially eliminated.
verting gain of +2V/V (Figure 1) using R = R = 1k
F
G
combined with 2pF of input capacitance and 0.5pF of
board capacitance will cause a feedback pole at
128MHz. If this pole is within the anticipated amplifier
bandwidth, it will jeopardize stability. Reducing the 1k
resistors to 100 extends the pole frequency to
1.28GHz, but could limit output swing by adding 200
in parallel with the amplifier’s load. Clearly, the selec-
tion of resistor values must be tailored to the specific
application.
ADC Input Buffer
Input buffer amplifiers can be a source of significant
errors in high-speed ADC applications. The input buffer
is usually required to rapidly charge and discharge the
ADC’s input, which is often capacitive (see Driving
Capacitive Loads). In addition, since a high-speed
ADC’s input impedance often changes very rapidly dur-
ing the conversion cycle, measurement accuracy must
Distortion Considerations
The MAX4265–MAX4270 are ultra-low-distortion, high-
bandwidth op amps. Output distortion will degrade as
the total load resistance seen by the amplifier decreas-
es. To minimize distortion, keep the input and gain-set-
ting resistor values relatively large. A 500 feedback
resistor combined with an appropriate input resistor to
set the gain will provide excellent AC performance with-
out significantly increasing distortion.
R
R
F
G
Noise Considerations
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-
nation of the feedback resistive network, those resistor
values 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. For example, the input noise
voltage density at the op amp input with a gain of
R *
S
V
IN
R
L
C
L
MAX4265
MAX4266
MAX4267
PART
R
(
)
R
(
G
)
GAIN (V/V)
F
MAX4265
MAX4266
MAX4267
24
+1
+2
+5
500
500
500
125
+10V/V using R = 100k and R = 11k is e =
n
F
G
18nV/ Hz. The input noise can be reduced to 8nV/ Hz
*OPTIONAL, USED TO MINIMIZE PEAKING FOR C > 15pF.
L
by choosing R = 1k , R = 110 .
F
G
Figure 1. Noninverting Configuration
______________________________________________________________________________________ 13
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
be maintained using an amplifier with very low output
20
impedance at high frequencies. The combination of
high speed, fast slew rate, low noise, and a low and
stable distortion overload makes the MAX4265–
15
MAX4270 ideally suited for use as buffer amplifiers in
MAX4265/MAX4268
MAX4266/MAX4269
high-speed ADC applications.
10
Low-Power Disable Mode
The MAX4265–MAX4270 feature an active-low disable
mode that can be used to save power and place the
MAX4267/MAX4270
5
outputs in a high-impedance state. Drive DISABLE_ with
logic levels, or connect DISABLE_ to V
for normal
CC
operation. In the dual versions (MAX4268/ MAX4269/
MAX4270), each individual op amp is disabled sepa-
rately, allowing the devices to be used in a multiplex
configuration. The supply current in low-power mode is
reduced to 1.6mA per amplifier. Enable time is typically
100ns, and disable time is typically 750µs.
0
0
20
40
60
(pF)
80
100
120
C
LOAD
Figure 2. MAX4265–MAX4270 Isolation Resistance vs.
Capacitive Load
5
4
3
5
C = 7.3pF
L
4
3
C = 5.1pF
L
2
1
2
C = 5.1pF
L
1
0
0
-1
-2
-3
-1
-2
-3
C = 7.3pF
L
C = 2.2pF
L
C = 2.2pF
L
-4
-5
-4
-5
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
Figure 3a. MAX4268 Small-Signal Gain vs. Frequency
Without Isolation Resistor
Figure 3b. MAX4269 Small-Signal Gain vs. Frequency
Without Isolation Resistor
5
4
4
3
3
2
C = 10pF
ISO
2
1
L
C = 15pF
L
R
= 12
C = 10pF
L
ISO
1
0
R
= 15
0
-1
-2
-3
-4
C = 10pF
L
ISO
-1
-2
-3
C = 10pF
L
R
= 18
C = 7.3pF
L
-4
-5
-5
-6
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
Figure 3c. MAX4270 Small-Signal Gain vs. Frequency
Without Isolation Resistor
Figure 4a. MAX4268 Small-Signal Gain vs. Frequency
With Isolation Resistor
14 ______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
5
4
4
3
3
2
C = 22pF
ISO
L
R
= 22
C = 10pF
ISO
L
R
= 12
C = 22pF
L
ISO
2
1
R
= 3.9
C = 10pF
L
ISO
1
0
R
= 15
0
-1
-2
-3
-4
C = 22pF
ISO
L
-1
-2
-3
R
= 6
C = 10pF
ISO
L
R
= 18
-4
-5
-5
-6
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
Figure 4b. MAX4269 Small-Signal Gain vs. Frequency With
Isolation Resistor
Figure 4c. MAX4270 Small-Signal Gain vs. Frequency With
Isolation Resistor
Because the MAX4265–MAX4270 have high band-
width, circuit layout becomes critical. A solid ground
plane provides a low-inductance path for high-speed
transient currents. Use multiple vias to the ground
Power Supplies, Bypassing, and Layout
The MAX4265–MAX4270 operate from a single +4.5V
to +8.0V supply or in a dual-supply configuration.
When operating with a single supply, connect the V
EE
to
plane for each bypass capacitor. If V is connected to
EE
pins directly to the ground plane. Bypass V
CC
ground, use multiple vias here, too. Avoid sharing
ground vias with other signals to reduce crosstalk
between circuit sections.
ground with ceramic chip capacitors. Due to the
MAX4265–MAX4270s’ wide bandwidth, use a 1nF
capacitor in parallel with a 0.1µF to 1µF capacitor. If the
device is located more than 10cm from the power sup-
ply, adding a larger bulk capacitor will improve perfor-
mance.
Avoid stray capacitance at the op amp’s inverting
inputs. Stray capacitance, in conjunction with the feed-
back resistance, forms an additional pole in the cir-
cuit’s transfer function, with its associate phase shift.
Minimizing the trace lengths connected to the inverting
input helps minimize stray capacitance.
When operating with dual supplies, ensure that the total
voltage across the device (V
to V ) does not
EE
CC
exceed +8V. Therefore, supplies of 2.5V, 3.3V, and
asymmetrical supplies are possible. For example, oper-
Chip Information
MAX4265/66/67 TRANSISTOR COUNT: 132
MAX4268/69/70 TRANSISTOR COUNT: 285
PROCESS: Bipolar
ation with V
= +5V and V = -3V provides sufficient
EE
CC
voltage swing for the negative pulses found in video
signals. When operating with dual supplies, the V
CC
pins and the V pins should be bypassed using the
EE
same guidelines stated in the paragraph above.
______________________________________________________________________________________ 15
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Pin Configurations
TOP VIEW
OUTA
INA-
1
2
3
4
5
6
7
8
16
15
V
V
CC
CC
OUTA
INA-
1
2
3
4
5
6
7
14
13
V
V
CC
DISABLE
IN-
1
2
3
4
8
7
6
5
V
V
CC
CC
INA+
14 N.C.
13 N.C.
12 INB+
11 INB-
10 OUTB
INA+
12 N.C.
11 N.C.
10 INB+
CC
MAX4265
MAX4266
MAX4267
DISABLEA
DISABLEB
MAX4268
MAX4269
MAX4270
DISABLEA
DISABLEB
MAX4268
MAX4269
MAX4270
IN+
OUT
V
V
EE
EE
V
EE
V
EE
V
V
9
8
INB-
EE
EE
OUTB
MAX/SO
N.C.
9
N.C.
SO
QSOP
16 ______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Package Information
______________________________________________________________________________________ 17
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Package Information (continued)
18 ______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Package Information (continued)
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.
19 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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