19-1552; Rev 2; 8/00
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
The MAX4265–MAX4270 ultra-low distortion, voltage-feedback op amps are capable of driving a 100Ω 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 supply or from dual ±2.25V to ±4.0V supplies. These features
make the MAX4265–MAX4270 ideal for use in high-performance communications and signal-processing applications that require low distortion and wide bandwidth.
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.
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 spacesaving 8-pin µMAX ® package, and the MAX4268/
MAX4269/MAX4270 are available in a 16-pin QSOP
package.
Features
♦ Operates from +4.5V to +8.0V
♦ Superior SFDR with 100Ω Load
-90dBc (fC = 5MHz)
-59dBc (fC = 100MHz)
♦ 35dBm IP3 (fC = 20MHz)
♦ 8nV/√Hz Voltage Noise Density
♦ 100MHz 0.1dB Gain Flatness (MAX4268)
♦ 900V/µs Slew Rate
♦ ±45mA Output Driving Capability
♦ Disable Mode Places Outputs in High-Impedance
State
Ordering Information
PART
MAX4265EUA
MAX4265ESA
MAX4266EUA
MAX4266ESA
MAX4267EUA
TEMP. RANGE
-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
8 µMAX
8 SO
-40°C to +85°C
8 µMAX
MAX4267ESA
-40°C to +85°C
8 SO
MAX4268EEE
-40°C to +85°C
16 QSOP
-40°C to +85°C
14 SO
High-Speed DAC Buffers
MAX4268ESD
MAX4269EEE
-40°C to +85°C
16 QSOP
RF Telecom Applications
MAX4269ESD
-40°C to +85°C
14 SO
High-Frequency Signal Processing
MAX4270EEE
-40°C to +85°C
16 QSOP
MAX4270ESD
-40°C to +85°C
14 SO
Applications
Base-Station Amplifiers
IF Amplifiers
High-Frequency ADC Drivers
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
Selector Guide
PART
MAX4265
MAX4266
MAX4267
MAX4268
MAX4269
MAX4270
NO. OF
OP AMPS
1
1
1
2
2
2
MIN GAIN
(V/V)
1
2
5
1
2
5
-3dB
BANDWIDTH (MHz)
400
350
300
300
350
200
GBP
(MHz)
400
700
1500
300
700
1000
FULL-POWER
BANDWIDTH (MHz)
270
350
300
175
200
200
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4265–MAX4270
General Description
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE)...............................................+8.5V
Voltage on Any Other Pin .................(VEE - 0.3V) to (VCC + 0.3V)
Short-Circuit Duration (VOUT to VCC or VEE) ..............Continuous
Continuous Power Dissipation (TA = +70°C)
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
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
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
(VCC = +5V, VEE = 0, RL = 100Ω to VCC/2, VCM = VCC/2, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
8.0
V
Operating Supply Voltage
Range
VCC
Inferred from PSRR test
4.5
Common-Mode Input Voltage
VCM
Inferred from CMRR test
VEE + 1.6
Input Offset Voltage
VOS
1
TCVOS
1.5
µV/°C
1
mV
Input Offset Voltage Drift
Input Offset Voltage Channel
Matching
Input Bias Current
Input Offset Current
MAX4268/MAX4269/MAX4270
VCC - 1.6
9
V
mV
IB
3.5
40
µA
IOS
0.1
6
µA
Common-Mode Input
Resistance
RINCM
Either input (VEE + 1.6V) ≤ VCM ≤ (VCC - 1.6V)
Differential Input Resistance
RINDIFF
-10mV ≤ VIN ≤ 10mV
40
kΩ
Common-Mode Rejection Ratio
CMRR
(VEE + 1.6V) ≤ VCM ≤ (VCC - 1.6V), no load
60
85
dB
Power-Supply Rejection Ratio
PSRR
VCC = 4.5V to 8.0V
60
85
dB
60
Open-Loop Voltage Gain
AOL
1.75V ≤ VOUT ≤ 3.25V
Output Voltage Swing
VOUT
VCC - VOH, VOL - VEE
Output Current Drive
IOUT
RL = 20Ω
Output Short-Circuit Current
Closed-Loop Output Resistance
Power-Up Time
Quiescent Supply Current
(per amplifier)
Disable Output Leakage Current
ISC
1
Sinking or sourcing to VCC or VEE
ROUT
tPWRUP
IS
95
1.1
±30
VOUT = 1V step, 0.1% settling time
MΩ
dB
1.5
V
±45
mA
100
mA
0.035
Ω
10
µs
Normal mode, DISABLE_ = VCC or floating
28
32
Disable mode, DISABLE_ = VEE
1.6
5
mA
mA
DISABLE_ = VEE, VEE ≤ VOUT ≤ VCC
0.2
2.5
µA
VCC - 3.5
DISABLE_ Logic Low
VCC - 1.5
DISABLE_ Logic High
V
V
DISABLE_ Logic Input Low
Current
DISABLE_ = VEE
5
100
µA
DISABLE_ Logic Input High
Current
DISABLE_ = VCC
1
30
µA
2
_______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
(VCC = +5V, VEE = 0, RL = 100Ω to VCC/2, VCM = VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Small-Signal -3dB Bandwidth
Full-Power Bandwidth
0.1dB Gain Flatness
SYMBOL
BW-3dB
FPBW
BW0.1dB
All-Hostile Crosstalk
Slew Rate
CONDITIONS
VOUT = 100mVp-p
VOUT = 1Vp-p
VOUT = 100mVp-p
MIN
TYP
MAX4265
400
MAX4266
350
MAX4267
300
MAX4268
300
MAX4269
350
MAX4270
200
MAX4265
270
MAX4266
350
MAX4267
300
MAX4268
175
MAX4269
200
MAX4270
200
MAX4265
80
MAX4266
30
MAX4267
55
MAX4268
100
MAX4269
35
MAX4270
35
MAX
UNITS
MHz
MHz
MHz
f = 10MHz
85
dB
SR
VOUT = +1V step
900
V/µs
Rise/Fall Times
tR, tF
VOUT = +1V step
1
ns
Settling Time (0.1%)
tS,0.1
VOUT = +1V step
15
ns
fC = 1MHz
VOUT = 1Vp-p
(MAX4265/
MAX4266/
MAX4267)
Spurious-Free
Dynamic Range
SFDR
VOUT = 1Vp-p
(MAX4268)
83
fC = 5MHz
85
fC = 10MHz
87
fC = 20MHz
81
fC = 60MHz
50
fC = 100MHz
47
fC = 1MHz
85
fC = 5MHz
85
fC = 10MHz
84
fC = 20MHz
79
fC = 60MHz
68
fC = 100MHz
60
dBc
_______________________________________________________________________________________
3
MAX4265–MAX4270
AC ELECTRICAL CHARACTERISTICS
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V, VEE = 0, RL = 100Ω to VCC/2, VCM = VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
VOUT = 1Vp-p
(MAX4269)
Spurious-Free
Dynamic Range
SFDR
VOUT = 1Vp-p
(MAX4270)
VOUT = 1Vp-p
(MAX4265/
MAX4266/
MAX4267)
VOUT = 1Vp-p
(MAX4268)
Second Harmonic
Distortion
VOUT = 1Vp-p
(MAX4269)
VOUT = 1Vp-p
(MAX4270)
4
MIN
TYP
fC = 1MHz
88
fC = 5MHz
90
fC = 10MHz
88
fC = 20MHz
79
fC = 60MHz
68
fC = 100MHz
59
fC = 1MHz
86
fC = 5MHz
81
fC = 10MHz
75
fC = 20MHz
68
fC = 60MHz
60
fC = 100MHz
56
fC = 1MHz
83
fC = 5MHz
85
fC = 10MHz
87
fC = 20MHz
81
fC = 60MHz
50
fC = 100MHz
fC = 1MHz
47
85
fC = 5MHz
85
fC = 10MHz
84
fC = 20MHz
79
fC = 60MHz
68
fC = 100MHz
60
fC = 1MHz
88
fC = 5MHz
90
fC = 10MHz
88
fC = 20MHz
79
fC = 60MHz
68
fC = 100MHz
59
fC = 1MHz
86
fC = 5MHz
81
fC = 10MHz
75
fC = 20MHz
68
fC = 60MHz
60
fC = 100MHz
56
_______________________________________________________________________________________
MAX
UNITS
dBc
dBc
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
(VCC = +5V, VEE = 0, RL = 100Ω to VCC/2, VCM = VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
fC = 1MHz
VOUT = 1Vp-p
(MAX4265/
MAX4266/
MAX4267)
VOUT = 1Vp-p
(MAX4268)
Third Harmonic
Distortion
VOUT = 1Vp-p
(MAX4269)
VOUT = 1Vp-p
(MAX4270)
Two-Tone, Third-Order
Intercept Distortion
IP3
VOUT = 1Vp-p,
fCA = 20MHz,
fCB = 21.25MHz
MIN
TYP
MAX
UNITS
98
fC = 5MHz
96
fC = 10MHz
91
fC = 20MHz
85
fC = 60MHz
75
fC = 100MHz
61
fC = 1MHz
95
fC = 5MHz
95
fC = 10MHz
93
fC = 20MHz
86
fC = 60MHz
72
fC = 100MHz
64
fC = 1MHz
88
fC = 5MHz
90
fC = 10MHz
88
fC = 20MHz
79
fC = 60MHz
68
fC = 100MHz
59
fC = 1MHz
96
fC = 5MHz
97
fC = 10MHz
91
fC = 20MHz
84
fC = 60MHz
74
fC = 100MHz
69
MAX4265/MAX4268
32
MAX4266/MAX4269
35
MAX4267/MAX4270
35
dBc
dBm
_______________________________________________________________________________________
5
MAX4265–MAX4270
AC ELECTRICAL CHARACTERISTICS (continued)
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V, VEE = 0, RL = 100Ω to VCC/2, VCM = VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
Input -1dB Compression Point
CONDITIONS
MIN
TYP
fC = 20MHz
MAX
UNITS
12
dBm
Differential Gain
DG
NTSC, f = 3.58MHz, RL = 150Ω to VCC/2
0.015
%
Differential Phase
DP
NTSC, f = 3.58MHz, RL = 150Ω to VCC/2
0.03
degrees
Input Capacitance
CIN
2
pF
Output Impedance
ROUT
Disabled Output Capacitance
f = 10MHz
1
Ω
DISABLE_ = VEE
5
pF
100
ns
750
µs
Enable Time
tEN
VIN = +1V
Disable Time
tDIS
VIN = +1V
No sustained
oscillation
Capacitive Load Stability
MAX4265/MAX4268
15
MAX4266/MAX4269
15
MAX4267/MAX4270
22
pF
Input Voltage Noise Density
en
f = 1kHz
8
nV/√Hz
Input Current Noise Density
in
f = 1kHz
1
pA/√Hz
Typical Operating Characteristics
(VCC = +5V, VEE = 0, DISABLE_ = +5V, RL = 100Ω to VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA = +25°C, unless otherwise noted.)
MAX4268/MAX4269/MAX4270
LARGE-SIGNAL GAIN
vs. FREQUENCY
2
3
GAIN (dB)
MAX4269
-2
-3
MAX4270
-5
-6
-1
MAX4269
-2
MAX4270
1M
10M
FREQUENCY (Hz)
100M
1G
MAX4268
0
MAX4269
-0.1
-0.2
-0.3
-4
-0.4
-5
-0.5
-6
0.1M
0.2
0.1
0
-3
-4
0.4
0.3
MAX4268
1
0
-1
VOUT = 1Vp-p
2
MAX4268
1
6
4
MAX4265/70-03
VOUT = 100mVp-p
GAIN (dB)
3
MAX4265/70-01
4
MAX4268/MAX4269/MAX4270
GAIN FLATNESS vs. FREQUENCY
MAX4265/70-02
MAX4268/MAX4269/MAX4270
SMALL-SIGNAL GAIN vs. FREQUENCY
GAIN (dB)
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
MAX4270
-0.6
0.1M
1M
10M
FREQUENCY (Hz)
100M
1G
0.1M
1M
10M
FREQUENCY (Hz)
_______________________________________________________________________________________
100M
1G
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
2
2
MAX4265
-2
MAX4266
-3
MAX4267
-5
-6
10M
100M
MAX4266
-2
0
-0.1
-0.2
MAX4267
-0.3
-4
-0.4
-5
-0.5
-6
-0.6
0.1M
1G
1M
10M
100M
0.1M
1G
1G
MAX4269
DISTORTION vs. FREQUENCY
VOUT = 1Vp-p
-20
-30
VOUT = 1Vp-p
-30
-40
2ND HARMONIC
3RD HARMONIC
-100
DISTORTION (dBc)
-70
-50
-60
-70
10
1
-50
-60
-70
-80
2ND HARMONIC
-80
-90
3RD HARMONIC
-90
100
2ND HARMONIC
3RD HARMONIC
-100
-100
0.1
MAX4265/70-09
-20
DISTORTION (dBc)
-60
0.1
10
1
0.1
100
10
1
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4270
DISTORTION vs. FREQUENCY
MAX4265/MAX4266/MAX4267
DISTORTION vs. LOAD RESISTANCE
MAX4268
DISTORTION vs. LOAD RESISTANCE
-30
fO = 5MHz
VOUT = 1Vp-p
-30
-20
-60
-70
-40
DISTORTION (dBc)
DISTORTION (dBc)
-50
-50
-60
-70
-80
2ND HARMONIC
-90
3RD HARMONIC
1
10
FREQUENCY (MHz)
100
-50
-60
-70
2ND HARMONIC
-80
3RD HARMONIC
-90
-100
-100
fO = 5MHz
VOUT = 1Vp-p
-30
-40
-40
MAX4265/70-12
VOUT = 1Vp-p
MAX4265/70-11
-20
MAX4265/70-10
-20
0.1
100M
MAX4268
DISTORTION vs. FREQUENCY
-40
-90
10M
MAX4265/MAX4266/MAX4267
DISTORTION vs. FREQUENCY
-50
-80
1M
FREQUENCY (Hz)
-40
-90
MAX4267
FREQUENCY (Hz)
VOUT = 1Vp-p
-80
MAX4265
MAX4266
0.1
FREQUENCY (Hz)
-30
DISTORTION (dB)
0.2
MAX4265/70-08
-20
1M
MAX4265/70-07
0.1M
0
-1
-3
-4
0.3
GAIN (dB)
GAIN (dB)
GAIN (dB)
0
-1
0.4
MAX4265
1
1
DISTORTION (dBc)
VOUT = 1Vp-p
3
MAX4265/70-06
3
MAX4265/70-05
4
MAX4265/70-04
4
MAX4265/MAX4266/MAX4267
GAIN FLATNESS vs. FREQUENCY
MAX4265/MAX4266/MAX4267
LARGE-SIGNAL GAIN vs. FREQUENCY
MAX4265/MAX4266/MAX4267
SMALL-SIGNAL GAIN vs. FREQUENCY
2ND HARMONIC
3RD HARMONIC
-100
0
100
200
300
RLOAD (Ω)
400
500
600
0
100
200
300
400
500
600
RLOAD (Ω)
_______________________________________________________________________________________
7
MAX4265–MAX4270
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0, DISABLE_ = +5V, RL = 100Ω to VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA =+25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0, DISABLE_ = +5V, RL = 100Ω to VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA =+25°C, unless otherwise noted.)
MAX4270
DISTORTION vs. LOAD RESISTANCE
-60
-70
2ND HARMONIC
-80
-90
-40
DISTORTION (dBc)
DISTORTION (dBc)
-50
-60
-70
-80
-90
3RD HARMONIC
3RD HARMONIC
-90
200
300
400
500
600
2ND HARMONIC
100
200
300
400
500
600
3RD HARMONIC
0
0.5
1.5
2.0
RLOAD (Ω)
VOLTAGE SWING (V)
MAX4268
DISTORTION vs. VOLTAGE SWING
MAX4269
DISTORTION vs. VOLTAGE SWING
MAX4270
DISTORTION vs. VOLTAGE SWING
fO = 5MHz
-30
-20
fO = 5MHz
-30
-20
-60
-70
-50
-60
-70
2ND HARMONIC
2ND HARMONIC
-80
-80
-90
-50
-60
-70
2ND HARMONIC
-80
3RD HARMONIC
-90
-90
3RD HARMONIC
3RD HARMONIC
-100
-100
0.5
1.0
1.5
2.0
2.5
-100
0
0.5
1.0
1.5
2.0
2.5
0
0.5
1.0
1.5
2.0
VOLTAGE SWING (Vp-p)
VOLTAGE SWING (Vp-p)
VOLTAGE SWING (Vp-p)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
SPURIOUS-FREE DYNAMIC RANGE
vs. FREQUENCY
TWO-TONE THIRD-ORDER
INTERCEPT vs. FREQUENCY
VOUT = 1Vp-p
60
-30
55
MAX4267/MAX4270
0.01
50
INTERCEPT (dBm)
SFDR (dBc)
-40
-50
-60
MAX4270
-70
MAX4266/MAX4269
MAX4269
-80
MAX4265/MAX4268
MAX4266/MAX4269
45
40
35
MAX4267/MAX4270
30
-90
2.5
MAX4265/70-21
VOUT = 1Vp-p
MAX4265/70-20
-20
MAX4265/70-19
0.1
2.5
-40
DISTORTION (dBc)
-50
fO = 5MHz
-30
-40
DISTORTION (dBc)
-40
0
1.0
RLOAD (Ω)
MAX4265/70-18
-20
100
-70
-100
0
MAX4265/70-16
0
-60
-80
-100
-100
-50
2ND HARMONIC
MAX4265/70-17
DISTORTION (dBc)
-50
fO = 5MHz
-30
-40
-40
DISTORTION (dBc)
fO = 5MHz
VOUT = 1Vp-p
-30
-20
MAX4265/70-14
fO = 5MHz
VOUT = 1Vp-p
-30
-20
MAX4265/70-13
-20
MAX4265/MAX4266/MAX4267
DISTORTION vs. VOLTAGE SWING
MAX4265/70-15
MAX4269
DISTORTION vs. LOAD RESISTANCE
THD + NOISE (%)
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
MAX4265/MAX4268
25
MAX4268
0.001
-100
0.1
1
10
FREQUENCY (MHz)
8
100
20
0.1
1
10
FREQUENCY (MHz)
100
0.1
1
10
FREQUENCY (MHz)
_______________________________________________________________________________________
100
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
10
1
-20
0.1
10
100
1k
10k 100k
1M
10M
-60
-80
1M
10M
100M
-120
0.1M
1G
1M
10M
100M
1G
MAX4266/MAX4269
DIFFERENTIAL GAIN AND PHASE
MAX4267/MAX4270
DIFFERENTIAL GAIN AND PHASE
0.020
0.015
0.010
0.005
0.000
-0.005
10
IRE
0.020
0.010
0.000
-0.010
-0.020
-0.030
10
100
IRE
MAX4265/70-27
MAX4265/MAX4268
DIFFERENTIAL GAIN AND PHASE
DIFF GAIN (%)
FREQUENCY (Hz)
MAX4265/70-26
FREQUENCY (Hz)
DIFF GAIN (%)
FREQUENCY (Hz)
MAX4265/70-25
DIFF GAIN (%)
1
-40
-100
0.01
0.1M
1
MAX4265/70-24
100
CROSSTALK (dB)
OUTPUT IMPEDANCE (Ω)
10
0
MAX4265/70-23
1000
MAX4265/70-22
100
VOLTAGE NOISE (nV/√Hz)
MAX4268/MAX4269/MAX4270
CROSSTALK vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
VOLTAGE NOISE vs. FREQUENCY
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
100
10
IRE
100
10
IRE
100
IRE
0.012
0.008
0.004
0.000
-0.004
-0.008
100
10
RL = 150Ω
100
RL = 150Ω
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
-10
-20
-30
CMRR (dB)
-30
-40
-50
-60
-40
-50
-60
-70
-80
-70
-90
-80
-100
10M
FREQUENCY (Hz)
100M
1G
4.5
VOH
4.0
3.5
3.0
2.5
2.0
1.5
1.0
VOL
0.5
-90
1M
5.0
OUTPUT VOLTAGE SWING (V)
-20
OUTPUT VOLTAGE SWING
vs. RESISTIVE LOAD RESISTANCE
MAX14265/70-29
0
MAX4265/70-28
0
-10
0.1M
-0.020
-0.030
RL = 150Ω
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
PSRR (dB)
IRE
0.000
-0.010
MAX4265/70-30
10
DIFF PHASE (°)
DIFF PHASE (°)
DIFF PHASE (°)
0.010
0.04
0.03
0.02
0.01
0.00
-0.01
0
10k
100k
1M
10M
FREQUENCY (Hz)
100M
1G
0
200
400
600
800
1000
RLOAD (Ω)
_______________________________________________________________________________________
9
MAX4265–MAX4270
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0, DISABLE_ = +5V, RL = 100Ω to VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA =+25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0, DISABLE_ = +5V, RL = 100Ω to VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA =+25°C, unless otherwise noted.)
POWER-UP/POWER-DOWN RESPONSE
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
DISABLE/ENABLE RESPONSE
-0.90
INPUT TO
DISABLE_
5V
0V
5V
DISABLE ENABLE
OUTPUT
500mV/div
OUTPUT
500mV/div
0V
INPUT OFFSET VOLTAGE (mV)
VCC
2.5V/div
MAX4265/70-32
MAX4265/70-33
MAX4265/70-31
-0.95
-1.00
-1.05
-1.10
-1.15
-1.20
5µs/div
250ns/div
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
SUPPLY VOLTAGE (V)
-3.0
-2.5
-2.0
-1.5
32
31
30
29
28
-1.0
27
-0.5
26
0
25
5.0
5.5
6.0
6.5
7.0
7.5
8.0
5
4
INPUT OFFSET VOLTAGE (mV)
-3.5
MAX4265/70-35
33
SUPPLY CURRENT (mA)
-4.0
34
3
2
1
0
-1
-2
-3
-4
-5
4.5
5.0
5.5
6.0
6.5
7.0
7.5
-50 -35 -20 -5
8.0
10
25
40
55
70
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
INPUT BIAS CURRENT vs. TEMPERATURE
INPUT OFFSET CURRENT
vs. TEMPERATURE
SUPPLY CURRENT (PER AMPLIFIER)
vs. TEMPERATURE
-3
-2
-1
300
200
100
0
-100
-200
-50 -35 -20 -5
10
25
40
TEMPERATURE (°C)
55
70
85
34
33
32
31
30
29
28
-300
27
-400
26
-500
0
35
85
MAX4265/70-39
400
SUPPLY CURRENT (mA)
-4
500
MAX4265/70-38
MAX4265/70-37
-5
INPUT OFFSET CURRENT (nA)
INPUT BIAS CURRENT (µA)
-4.5
10
35
MAX4265/70-34
-5.0
4.5
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
SUPPLY CURRENT (PER AMPLIFIER)
vs. SUPPLY VOLTAGE
MAX4265/70-36
INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE
INPUT BIAS CURRENT (µA)
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
25
-50 -35 -20 -5
10
25
40
TEMPERATURE (°C)
55
70
85
-50 -35 -20 -5
10
25
40
TEMPERATURE (°C)
______________________________________________________________________________________
55
70
85
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
MAX4265/70-41
VOH
3
INPUT
50mV/div
INPUT
25mV/div
OUTPUT
50mV/div
OUTPUT
50mV/div
2
1
VOL
0
-50 -35 -20 -5
10
25
40
55
70
5ns/div
85
5ns/div
TEMPERATURE (°C)
MAX4267/MAX4270
SMALL-SIGNAL PULSE RESPONSE
MAX4265/70-44
MAX4265/70-43
MAX4265/MAX4268
LARGE-SIGNAL PULSE RESPONSE
INPUT
10mV/div
INPUT
500mV/div
OUTPUT
50mV/div
OUTPUT
500mV/div
5ns/div
MAX4266/MAX4269
LARGE-SIGNAL PULSE RESPONSE
MAX4267/MAX4270
LARGE-SIGNAL PULSE RESPONSE
MAX4265/70-46
5ns/div
MAX4265/70-45
VOLTAGE SWING (V)
4
MAX4265/70-40
5
MAX4266/MAX4269
SMALL-SIGNAL PULSE RESPONSE
MAX4265/70-42
MAX4265/MAX4268
SMALL-SIGNAL PULSE RESPONSE
VOLTAGE SWING vs. TEMPERATURE
INPUT
250mV/div
INPUT
100mV/div
OUTPUT
500mV/div
OUTPUT
500mV/div
5ns/div
5ns/div
______________________________________________________________________________________
11
MAX4265–MAX4270
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = 0, DISABLE_ = +5V, RL = 100Ω to VCC/2, MAX4265/MAX4268 AV = +1V/V, MAX4266/MAX4269 AV = +2V/V,
MAX4267/MAX4270 AV = +5V/V, TA =+25°C, unless otherwise noted.)
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Pin Description
PIN
MAX4268
MAX4269
MAX4270
MAX4265
MAX4266
MAX4267
NAME
FUNCTION
8 µMAX/SO
14 SO
16 QSOP
1
—
—
DISABLE
Disable Input. Active low.
—
4, 5
4, 5
DISABLEA, DISABLEB
Disable Input. Active low.
2
—
—
IN-
Inverting Input
—
2, 9
2, 11
INA-, INB-
Inverting Input
3
—
—
IN+
Noninverting Input
—
3, 10
3, 12
INA+, INB+
Noninverting Input
4, 5
6, 7
6, 7
VEE
Negative Power Supply
6
—
—
OUT
Amplifier Output
—
1, 8
1, 10
OUTA, OUTB
Amplifier Output
7, 8
13, 14
15, 16
VCC
Positive Power Supply. Connect to a +4.5V to +8.0V supply.
—
11, 12
8, 9, 13, 14
N.C.
No Connection. Not internally connected.
Detailed Description
The MAX4265–MAX4270 family of operational amplifiers 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 telecommunications applications and high-performance signal processing.
These devices can drive a 100Ω load and deliver 45mA
while maintaining DC accuracy and AC performance.
The input common-mode voltage ranges from (VEE +
1.6V) to (VCC - 1.6V), while the output typically swings
to within 1.1V of the rails.
Low Distortion
The MAX4265–MAX4270 use proprietary bipolar technology to achieve minimum distortion in low-voltage
systems. This feature is typically available only in dualsupply 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
• Choose the proper feedback-resistor and gain-resistor values for the application. In general, the smaller
the closed-loop gain, the smaller the THD generated,
especially when driving heavy resistive loads. Largevalue feedback resistors can significantly improve
distortion. The MAX4265–MAX4270’s THD normally
increases at approximately 20dB per decade at frequencies above 1MHz; this is a lower rate than that of
comparable dual-supply op amps.
• 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 decompensated devices (MAX4266/MAX4267/
MAX4269/MAX4270) deliver the best distortion performance since they have a slightly higher slew rate
and provide a higher amount of loop gain for a given
closed-loop gain setting.
______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
Unity-Gain Configurations
The MAX4265 and MAX4268 are internally compensated for unity gain. When configured for unity gain, they
require a small resistor (RF) in series with the feedback
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.
Inverting and Noninverting Configurations
The values of the gain-setting feedback and input resistors 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 noninverting gain of +2V/V (Figure 1) using RF = RG = 1kΩ
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 1kΩ
resistors to 100Ω extends the pole frequency to
1.28GHz, but could limit output swing by adding 200Ω
in parallel with the amplifier’s load. Clearly, the selection of resistor values must be tailored to the specific
application.
Distortion Considerations
The MAX4265–MAX4270 are ultra-low-distortion, highbandwidth op amps. Output distortion will degrade as
the total load resistance seen by the amplifier decreases. To minimize distortion, keep the input and gain-setting resistor values relatively large. A 500Ω feedback
resistor combined with an appropriate input resistor to
set the gain will provide excellent AC performance without significantly increasing distortion.
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 thermal noise contribution is affected by the parallel combination 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
+10V/V using R F = 100kΩ and R G = 11kΩ is e n =
18nV/√Hz. The input noise can be reduced to 8nV/√Hz
by choosing RF = 1kΩ, RG = 110Ω.
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.
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 corresponding isolation resistor is 6Ω (MAX4266/MAX4269).
Figures 3 and 4 show the peaking that occurs in the frequency response with and without an isolation resistor.
Coaxial cable and other transmission lines are easily
driven when terminated at both ends with their characteristic impedance. When driving back-terminated
transmission lines, the capacitive load of the transmission line is essentially eliminated.
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 during the conversion cycle, measurement accuracy must
RG
RF
RS*
VIN
CL
MAX4265
MAX4266
MAX4267
PART
RF (Ω)
RG (Ω)
GAIN (V/V)
MAX4265
MAX4266
MAX4267
24
500
500
∞
500
125
+1
+2
+5
RL
*OPTIONAL, USED TO MINIMIZE PEAKING FOR CL > 15pF.
Figure 1. Noninverting Configuration
______________________________________________________________________________________
13
MAX4265–MAX4270
Choosing Resistor Values
Low-Power Disable Mode
The MAX4265–MAX4270 feature an active-low disable
mode that can be used to save power and place the
outputs in a high-impedance state. Drive DISABLE_ with
logic levels, or connect DISABLE_ to VCC for normal
operation. In the dual versions (MAX4268/ MAX4269/
MAX4270), each individual op amp is disabled separately, 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.
15
MAX4265/MAX4268
0
0
40
4
3
CL = 5.1pF
80
100
120
CL = 7.3pF
2
GAIN (dB)
1
0
CL = 7.3pF
CL = 5.1pF
1
0
-1
CL = 2.2pF
-2
CL = 2.2pF
-3
-4
-4
-5
-5
0.1M
1M
10M
100M
0.1M
1G
1M
Figure 3a. MAX4268 Small-Signal Gain vs. Frequency
Without Isolation Resistor
5
3
4
3
CL = 15pF
0
1
GAIN (dB)
1
2
-1
-2
-3
100M
1G
Figure 3b. MAX4269 Small-Signal Gain vs. Frequency
Without Isolation Resistor
4
2
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
CL = 10pF
RISO = 12Ω
CL = 10pF
RISO = 15Ω
0
CL = 10pF
-1
CL = 7.3pF
-2
-4
-3
-5
-4
CL = 10pF
RISO = 18Ω
-5
-6
0.1M
1M
10M
100M
1G
FREQUENCY (Hz)
Figure 3c. MAX4270 Small-Signal Gain vs. Frequency
Without Isolation Resistor
14
60
Figure 2. MAX4265–MAX4270 Isolation Resistance vs.
Capacitive Load
3
-3
20
CLOAD (pF)
5
-2
MAX4267/MAX4270
5
4
-1
MAX4266/MAX4269
10
5
2
GAIN (dB)
20
RISO (Ω)
be maintained using an amplifier with very low output
impedance at high frequencies. The combination of
high speed, fast slew rate, low noise, and a low and
stable distortion overload makes the MAX4265–
MAX4270 ideally suited for use as buffer amplifiers in
high-speed ADC applications.
GAIN (dB)
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
0.1M
1M
10M
100M
1G
FREQUENCY (Hz)
Figure 4a. MAX4268 Small-Signal Gain vs. Frequency
With Isolation Resistor
______________________________________________________________________________________
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
4
4
3
3
CL = 10pF
RISO = 12Ω
CL = 10pF
RISO = 15Ω
1
0
-1
CL = 10pF
RISO = 18Ω
-2
CL = 22pF
RISO = 3.9Ω
1
GAIN (dB)
GAIN (dB)
2
CL = 22pF
RISO = 22Ω
2
0
-1
CL = 22pF
RISO = 6Ω
-2
-3
-3
-4
-4
-5
-5
-6
0.1M
1M
10M
100M
1G
FREQUENCY (Hz)
Figure 4b. MAX4269 Small-Signal Gain vs. Frequency With
Isolation Resistor
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 VEE
pins directly to the ground plane. Bypass V CC to
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 supply, adding a larger bulk capacitor will improve performance.
When operating with dual supplies, ensure that the total
voltage across the device (V CC to V EE ) does not
exceed +8V. Therefore, supplies of ±2.5V, ±3.3V, and
asymmetrical supplies are possible. For example, operation with VCC = +5V and VEE = -3V provides sufficient
voltage swing for the negative pulses found in video
signals. When operating with dual supplies, the V CC
pins and the VEE pins should be bypassed using the
same guidelines stated in the paragraph above.
0.1M
1M
10M
100M
1G
FREQUENCY (Hz)
Figure 4c. MAX4270 Small-Signal Gain vs. Frequency With
Isolation Resistor
Because the MAX4265–MAX4270 have high bandwidth, circuit layout becomes critical. A solid ground
plane provides a low-inductance path for high-speed
transient currents. Use multiple vias to the ground
plane for each bypass capacitor. If VEE is connected to
ground, use multiple vias here, too. Avoid sharing
ground vias with other signals to reduce crosstalk
between circuit sections.
Avoid stray capacitance at the op amp’s inverting
inputs. Stray capacitance, in conjunction with the feedback resistance, forms an additional pole in the circuit’s transfer function, with its associate phase shift.
Minimizing the trace lengths connected to the inverting
input helps minimize stray capacitance.
Chip Information
MAX4265/66/67 TRANSISTOR COUNT: 132
MAX4268/69/70 TRANSISTOR COUNT: 285
PROCESS: Bipolar
______________________________________________________________________________________
15
MAX4265–MAX4270
5
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
MAX4265–MAX4270
Pin Configurations
TOP VIEW
DISABLE 1
8
IN- 2
IN+
3
MAX4265
MAX4266
MAX4267
VEE 4
VCC
7
VCC
6
OUT
5
VEE
OUTA 1
16 VCC
13 VCC
INA- 2
15 VCC
12 N.C.
INA+ 3
14 N.C.
11 N.C.
DISABLEA 4
10 INB+
DISABLEB 5
OUTA 1
14 VCC
2
INAINA+
3
DISABLEA 4
DISABLEB 5
MAX4268
MAX4269
MAX4270
VEE 6
9
INB-
VEE 6
VEE 7
8
OUTB
VEE 7
µMAX/SO
MAX4268
MAX4269
MAX4270
N.C. 8
12 INB+
11 INB10 OUTB
9
SO
QSOP
16
13 N.C.
______________________________________________________________________________________
N.C.
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
E
Ø0.50±0.1
8
INCHES
DIM
A
A1
A2
b
H
c
D
e
E
H
0.6±0.1
1
L
1
α
0.6±0.1
S
BOTTOM VIEW
D
MIN
0.002
0.030
MAX
0.043
0.006
0.037
0.010
0.014
0.005
0.007
0.116
0.120
0.0256 BSC
0.116
0.120
0.188
0.198
0.016
0.026
6°
0°
0.0207 BSC
8LUMAXD.EPS
4X S
8
MILLIMETERS
MAX
MIN
0.05
0.75
1.10
0.15
0.95
0.25
0.36
0.13
0.18
2.95
3.05
0.65 BSC
2.95
3.05
5.03
4.78
0.66
0.41
0°
6°
0.5250 BSC
TOP VIEW
A1
A2
A
c
e
b
FRONT VIEW
α
L
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
21-0036
REV.
J
1
1
______________________________________________________________________________________
17
MAX4265–MAX4270
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.053
0.069
0.004
0.010
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.050
0.016
MAX
MIN
1.75
1.35
0.25
0.10
0.49
0.35
0.19
0.25
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
MAX4265–MAX4270
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
18
______________________________________________________________________________________
REV.
B
1
1
Ultra-Low-Distortion, +5V,
400MHz Op Amps with Disable
QSOP.EPS
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19
© 2000 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
MAX4265–MAX4270
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
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