Maxim MAX4350EUK-T Ultra-small, low-cost, 210mhz, dual-supply op amps with rail-to-rail output Datasheet

19-1989; Rev 0; 3/01
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
Features
♦ Ultra-Small 5-Pin SC70, 5-Pin SOT23, and 8-Pin
SOT23 Packages
♦ Low Cost
♦ High Speed
210MHz -3dB Bandwidth
55MHz 0.1dB Gain Flatness
485V/µs Slew Rate
♦ Rail-to-Rail Outputs
♦ Input Common-Mode Range Extends to VEE
♦ Low Differential Gain/Phase: 0.02%/0.08°
♦ Low Distortion at 5MHz
-65dBc SFDR
-63dB Total Harmonic Distortion
Applications
Set-Top Boxes
Surveillance Video Systems
Video Line Drivers
Analog-to-Digital Converter Interface
CCD Imaging Systems
Video Routing and Switching Systems
Digital Cameras
Ordering Information
PART
TEMP. RANGE
PINPACKAGE
MAX4350EXK-T
-40°C to +85°C
5 SC70-5
MAX4350EUK-T
-40°C to +85°C
5 SOT23-5
ADRA
MAX4351EKA-T
-40°C to +85°C
8 SOT23-8
AAIC
MAX4351ESA
-40°C to +85°C
8 SO
ACF
—
Pin Configurations
Typical Operating Circuit
TOP VIEW
RF
24Ω
OUT 1
RTO
75Ω
MAX4350
TOP
MARK
VOUT
ZO = 75Ω
RO
75Ω
IN
RTIN
75Ω
UNITY-GAIN LINE DRIVER
(RL = RO + RTO)
VEE 2
IN+ 3
5
VCC
4
IN-
MAX4350
SC70-5/SOT23-5
Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ 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
MAX4350/MAX4351
General Description
The MAX4350 single and MAX4351 dual op amps are
unity-gain-stable devices that combine high-speed performance with Rail-to-Rail® outputs. Both devices operate from dual ±5V supplies. The common-mode input
voltage range extends to the negative power-supply
rail.
The MAX4350/MAX4351 require only 6.9mA of quiescent supply current per op amp while achieving a
210MHz -3dB bandwidth and a 485V/µs slew rate. Both
devices are excellent solutions in low-power systems
that require wide bandwidth, such as video, communications, and instrumentation.
The MAX4350 is available in an ultra-small 5-pin SC70
package and the MAX4351 is available in a spacesaving 8-pin SOT23 package.
MAX4350/MAX4351
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE)................................................+12V
IN_-, IN_+, OUT_..............................(VEE - 0.3V) to (VCC + 0.3V)
Output Short-Circuit Current to VCC or VEE ......................150mA
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C) .............200mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ...........571mW
8-Pin SOT23 (derate 5.26mW/°C above +70°C) .........421mW
8-Pin SO (derate 5.9mW/°C above +70°C) .................471mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +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 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
(VCC = +5V, VEE = -5V, RL = ∞ to 0, VOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Input Common-Mode
Voltage Range
VCM
Input Offset Voltage
VOS
Input Offset Voltage Matching
Input Offset Voltage Temperature
Coefficient
Input Bias Current
Input Offset Current
Input Resistance
Common-Mode Rejection Ratio
Open-Loop Gain
CONDITIONS
Guaranteed by CMRR test
MIN
VEE
1
MAX4351 only
2
VCC 2.25
V
26
mV
TCVOS
8
µV/°C
IB
7.5
20
0.5
4
IOS
RIN
CMRR
AVOL
VOUT
IOUT
ISC
Open-Loop Output Resistance
ROUT
Power-Supply Rejection Ratio
PSRR
Operating Supply-Voltage
Range
VS
Quiescent Supply Current
(Per Amplifier)
IS
µA
µA
Differential mode (-1V ≤ VIN ≤ +1V)
70
kΩ
Common mode (-5V ≤ VCM ≤ +2.75V)
3
MΩ
dB
VEE ≤ VCM ≤ (VCC - 2.25V)
70
95
-4.5V ≤ VOUT ≤ +4.5V, RL = 2kΩ
50
60
-4.25V ≤ VOUT ≤ +4.25V, RL = 150Ω
48
58
RL = 150Ω
RL = 75Ω
Output Short-Circuit Current
UNITS
mV
RL = 2kΩ
Output Current
MAX
1
-3.75V ≤ VOUT ≤ +3.75V, RL = 75Ω
Output Voltage Swing
TYP
RL = 50Ω
57
VCC - VOH
0.125
0.350
VOL - VEE
0.065
0.170
VCC - VOH
0.525
0.750
VOL - VEE
0.370
0.550
VCC - VOH
0.925
1.550
VOL - VEE
0.750
1.7
Sourcing
55
80
Sinking
40
75
VCC, VEE
52
V
mA
±120
Sinking or sourcing
VS = ±4.5V to ±5.5V
dB
mA
8
Ω
66
dB
±4.5
6.9
_______________________________________________________________________________________
±5.5
V
9.0
mA
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
(VCC = +5V, VEE = -5V, VCM = 0, RF = 24Ω, RL = 100Ω to 0, AVCL = +1V/V, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Small-Signal -3dB Bandwidth
BWSS
VOUT = 100mVp-p
210
MHz
Large-Signal -3dB Bandwidth
BWLS
VOUT = 2Vp-p
175
MHz
VOUT = 100mVp-p
55
VOUT = 2Vp-p
40
Bandwidth for 0.1dB Gain
Flatness
BW0.1dB
MHz
Slew Rate
SR
VOUT = 2V step
485
V/µs
Settling Time to 0.1%
tS
VOUT = 2V step
16
ns
Rise/Fall Time
tR, tF
VOUT = 100mVp-p
Spurious-Free Dynamic Range
SFDR
fC = 5MHz, VOUT = 2Vp-p
Harmonic Distortion
Two-Tone, Third-Order
Intermodulation Distortion
Channel-to-Channel Isolation
HD
IP3
CHISO
Input 1dB Compression Point
fC = 5MHz,
VOUT = 2Vp-p
4
ns
-65
dBc
2nd harmonic
-65
3rd harmonic
-58
Total harmonic
distortion
-63
dBc
f1 = 4.7MHz, f2 = 4.8MHz, VOUT = 1Vp-p
66
dBc
Specified at DC, MAX4351 only
102
dB
14
dBm
Differential Phase Error
DP
NTSC, RL = 150Ω
0.08
degrees
Differential Gain Error
DG
NTSC, RL = 150Ω
0.02
%
Input Noise-Voltage Density
eN
f = 10kHz
10
nV/√Hz
iN
f = 10kHz
1.8
pA/√Hz
1
pF
1.5
Ω
Input Noise-Current Density
fC = 10MHz, AVCL = +2V/V
Input Capacitance
CIN
Output Impedance
ZOUT
f = 10MHz
Note 1: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design.
_______________________________________________________________________________________
3
MAX4350/MAX4351
AC ELECTRICAL CHARACTERISTICS
Typical Operating Characteristics
(VCC = +5V, VEE = -5V, VCM = 0, AVCL = +1V/V, RF = 24Ω, RL = 100Ω to 0, TA = +25°C, unless otherwise noted.)
LARGE-SIGNAL GAIN vs. FREQUENCY
0.2
1
0.1
0
0
GAIN (dB)
2
1
-1
-1
-2
-0.2
-3
-0.3
-4
-4
-0.4
-5
-5
-0.5
-6
-6
-0.6
1M
10M
100M
100k
1G
1M
10M
GAIN FLATNESS vs. FREQUENCY
0.2
-0.2
DISTORTION (dBc)
-0.1
1
-0.3
MAX4350-03
1G
-30
-40
-50
2ND HARMONIC
-60
-70
0.1
-0.4
100M
VOUT = 2Vp-p
AVCL = +1V/V
-10
-20
IMPEDANCE (Ω)
0
-80
-0.5
3RD HARMONIC
-90
-100
0.01
10M
100M
1G
100k
1M
10M
FREQUENCY (Hz)
-10
-20
DISTORTION (dBc)
-30
-40
2ND HARMONIC
-50
-60
-70
VOUT = 2Vp-p
AVCL = +5V/V
-90
-100
2ND HARMONIC
-50
-60
3RD HARMONIC
1M
10M
FREQUENCY (Hz)
100M
100M
0
fO = 5MHz
VOUT = 2Vp-p
AVCL = +1V/V
-10
-20
-30
-40
-50
-60
2ND HARMONIC
-70
-80
-80
-90
-90
3RD HARMONIC
-100
-100
100k
10M
DISTORTION vs. LOAD RESISTANCE
-30
-40
-70
3RD HARMONIC
-80
1M
FREQUENCY (Hz)
DISTORTION vs. FREQUENCY
0
MAX4350-07
VOUT = 2Vp-p
AVCL = +2V/V
100k
1G
FREQUENCY (Hz)
DISTORTION vs. FREQUENCY
0
100M
DISTORTION (dBc)
1M
MAX4350-08
100k
MAX4350-09
-0.6
-10
10M
0
10
0.1
-20
1M
DISTORTION vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4350-05
VOUT = 2Vp-p
0.3
100k
1G
FREQUENCY (Hz)
100
MAX4350 toc04
0.4
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
4
0
-0.1
-3
-2
VOUT = 100mVp-p
0.3
2
100k
GAIN (dB)
0.4
MAX4350-02
VOUT = 2Vp-p
3
GAIN (dB)
GAIN (dB)
MAX4350-01
VOUT = 100mVp-p
3
GAIN FLATNESS vs. FREQUENCY
4
MAX4350-06
SMALL-SIGNAL GAIN vs. FREQUENCY
4
DISTORTION (dBc)
MAX4350/MAX4351
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
100k
1M
10M
FREQUENCY (Hz)
100M
0
200
400
600
RLOAD (Ω)
_______________________________________________________________________________________
800
1000
1200
Ultra-Small, Low-Cost, 210MHz, Single-Supply
Op Amps with Rail-to-Rail Outputs
-30
0
-50
DIFF PHASE (degrees)
3RD HARMONIC
-60
-70
2ND HARMONIC
-80
-90
-100
0.5
1.5
1.0
IRE
-60
-90
-100
0
IRE
100k
100
1.4
VSWING (V)
-40
-50
-60
100M
1G
RF = 24Ω
AVCL = +1V/V
INPUT
50mV/div
1.2
-30
10M
SMALL-SIGNAL PULSE RESPONSE
MAX4350-14
MAX4350-13
1.6
1M
FREQUENCY (Hz)
OUTPUT VOLTAGE SWING
vs. LOAD RESISTANCE
-20
1.0
0.8
0.6
-70
-90
0.2
-100
0
1M
10M
100M
VOL - VEE
0
1G
RLOAD (Ω)
SMALL-SIGNAL PULSE RESPONSE
SMALL-SIGNAL PULSE RESPONSE
RF = 500Ω
AVCL = +2V/V
INPUT
25mV/div
OUTPUT
50mV/div
20ns/div
20ns/div
100 200 300 400 500 600 700 800 900
FREQUENCY (Hz)
MAX4350-16
100k
OUTPUT
50mV/div
VCC - VOH
0.4
-80
LARGE-SIGNAL PULSE RESPONSE
RF = 500Ω
AVCL = +5V/V
RF = 24Ω
AVCL = +1V/V
INPUT
10mV/div
INPUT
1V/div
OUTPUT
50mV/div
OUTPUT
1V/div
20ns/div
MAX4350-18
PSR (dB)
-50
-80
POWER-SUPPLY REJECTION
vs. FREQUENCY
-10
-40
-70
VOLTAGE SWING (Vp-p)
0
100
0.12
0.10
0.08
0.06
0.04
0.02
0
-0.02
-0.04
2.0
MAX4350-12
-20
MAX4350-15
-40
-10
MAX4350-17
DISTORTION (dBc)
-30
0.025
0.020
0.015
0.010
0.005
0
-0.005
-0.010
CMR (dB)
-20
0
MAX4350-11
fO = 5MHz
AVCL = +1V/V
DIFF GAIN (%)
MAX4350-10
0
-10
COMMON-MODE REJECTION
vs. FREQUENCY
DIFFERENTIAL GAIN AND PHASE
DISTORTION vs. VOLTAGE SWING
20ns/div
_______________________________________________________________________________________
5
MAX4350/MAX4351
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, VCM = 0, AVCL = +1V/V, RF = 24Ω, RL = 100Ω to 0, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, VCM = 0, AVCL = +1V/V, RF = 24Ω, RL = 100Ω to 0, TA = +25°C, unless otherwise noted.)
LARGE-SIGNAL PULSE RESPONSE
INPUT
1V/div
INPUT
500mV/div
OUTPUT
1V/div
RL = 100Ω
INPUT
1V/div
MAX4350-21
RF = 500Ω
AVCL = +2V/V
VOLTAGE NOISE (nV/√Hz)
RF = 500Ω
AVCL = +2V/V
VOLTAGE NOISE vs. FREQUENCY
100
MAX4350-20
MAX4350-19
LARGE-SIGNAL PULSE RESPONSE
10
1
20ns/div
20ns/div
1
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
SMALL-SIGNAL BANDWIDTH
vs. LOAD RESISTANCE
ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
RL = 100Ω
15
13
250
BANDWIDTH (MHz)
RISO (Ω)
14
10
300
MAX4350-23
16
MAX4350-22
100
SMALL SIGNAL
(VOUT = 100mVp-p)
12
MAX4350-24
CURRENT NOISE vs. FREQUENCY
CURRENT NOISE (pA/√Hz)
200
150
100
11
50
10
LARGE SIGNAL (VOUT = 2Vp-p)
1
0
9
1
10
100
1k
10k
100k
1M
10M
0
100 200 300 400 500 600 700 800
RLOAD (Ω)
CLOAD (pF)
MAX4351
CROSSTALK vs. FREQUENCY
OPEN-LOOP GAIN vs. LOAD RESISTANCE
70
40
20
CROSSTALK (dB)
60
50
40
30
MAX4350-26
60
MAX4350-25
80
0
-20
-40
-60
-80
20
-100
10
-120
-140
0
100
1k
RLOAD (Ω)
6
0
50 100 150 200 250 300 350 400 450 500
FREQUENCY (Hz)
OPEN-LOOP GAIN (dBc)
MAX4350/MAX4351
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
10k
0.1M
1M
10M
100M
FREQUENCY (Hz)
_______________________________________________________________________________________
1G
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
PIN
NAME
FUNCTION
MAX4350
MAX4351
1
—
OUT
Amplifier Output
2
4
VEE
Negative Power Supply
or Ground (in singlesupply operation)
3
—
IN+
Noninverting Input
4
—
IN-
Inverting Input
Positive Power Supply
5
8
VCC
—
1
OUTA
—
2
INA-
Amplifier A Output
Inverting and Noninverting Configurations
Select the gain-setting feedback (RF) and input (RG)
resistor values to fit your application (Figures 1a and
1b). Large resistor values increase voltage noise and
interact with the amplifier’s input and PC board capacitance. This can generate undesirable poles and zeros
and decrease bandwidth or cause oscillations. For
example, a noninverting gain-of-two configuration (RF =
RG) using 1kΩ resistors, combined with 1pF of amplifier
input capacitance and 1pF of PC board capacitance,
causes a pole at 159MHz. Since this pole is within the
amplifier bandwidth, it jeopardizes stability. Reducing
the 1kΩ resistors 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.
Amplifier A Inverting
Input
—
3
INA+
Amplifier A Noninverting
Input
—
7
OUTB
Amplifier B Output
—
6
INB-
Amplifier B Inverting
Input
—
5
INB+
Amplifier B Noninverting
Input
Layout and Power-Supply Bypassing
These amplifiers operate from dual ±5V supplies. Bypass
each supply with a 0.1µF capacitor to ground.
Maxim recommends using microstrip and stripline techniques 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-
RF
RG
Detailed Description
The MAX4350/MAX4351 are single-supply, rail-to-rail,
voltage-feedback amplifiers that employ current-feedback techniques to achieve 485V/µs slew rates and
210MHz bandwidths. Excellent harmonic distortion and
differential gain/phase performance make these amplifiers an ideal choice for a wide variety of video and RF
signal-processing applications.
The output voltage swings to within 125mV of each supply rail. Local feedback around the output stage
ensures low open-loop output impedance to reduce
gain sensitivity to load variations. The input stage permits common-mode voltages beyond the negative supply and to within 2.25V of the positive supply rail.
RTO
OUT
MAX435 _
IN
RO
RTIN
Figure 1a. Noninverting Gain Configuration
RF
RG
IN
Applications Information
RTIN
RTO
Choosing Resistor Values
Unity-Gain Configuration
The MAX4350/MAX4351 are internally compensated for
unity gain. When configured for unity gain, a 24Ω resistor (RF) in series with the feedback path optimizes AC
performance. This resistor improves AC response by
reducing the Q of the parallel LC circuit formed by the
parasitic feedback capacitance and inductance.
OUT
MAX435 _
RO
RS
Figure 1b. Inverting Gain Configuration
_______________________________________________________________________________________
7
MAX4350/MAX4351
Pin Description
ful attention to inputs and outputs to avoid large parasitic capacitance. Whether or not you use a constantimpedance board, observe the following design guidelines:
• Don’t use wire-wrap boards; they are too inductive.
• Don’t use IC sockets; they increase parasitic capacitance and inductance.
• Use surface-mount instead of through-hole components for better high-frequency performance.
• Use a PC board with at least two layers; it should be
as free from voids as possible.
• Keep signal lines as short and as straight as possible. Do not make 90° turns; round all corners.
Rail-to-Rail Outputs,
Ground-Sensing Input
The input common-mode range extends from
V EE to (V CC - 2.25V) with excellent common-mode
rejection. Beyond this range, the amplifier output is a
nonlinear function of the input, but does not undergo
phase reversal or latchup. The output swings to within
125mV of either power-supply rail with a 2kΩ load.
Output Capacitive Load and Stability
The MAX4350/MAX4351 are optimized for AC performance. They are not designed to drive highly reactive
loads, which decrease phase margin and may produce
excessive ringing and oscillation. Figure 2 shows a circuit that eliminates this problem. Figure 3 is a graph of
the Isolation Resistance (RISO) vs. Capacitive Load.
Figure 4 shows how a capacitive 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 load capacitance
and the isolation resistor. Figure 5 shows the effect of a
27Ω isolation resistor on closed-loop response.
Coaxial cable and other transmission lines are easily
driven when properly terminated at both ends with their
characteristic impedance. Driving back-terminated
transmission lines essentially eliminates the line’s
capacitance.
30
RF
RG
25
RISO
MAX435 _
VIN
RTIN
VOUT
CL
50Ω
ISOLATION RESISTANCE (Ω)
MAX4350/MAX4351
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
20
15
10
5
0
0
Figure 2. Driving a Capacitive Load Through an Isolation Resistor
8
50
100
150
200
CAPACITIVE LOAD (pF)
250
Figure 3. Isolation Resistance vs. Capacitive Load
_______________________________________________________________________________________
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
5
2
CL = 15pF
0
2
-1
GAIN (dB)
3
CL = 10pF
1
0
CL = 5pF
-1
RISO = 27Ω
CL = 47pF
1
4
GAIN (dB)
MAX4350/MAX4351
3
6
CL = 68pF
-2
CL = 120pF
-3
-4
-5
-2
-3
-6
-4
-7
100k
1M
10M
100M
1G
100k
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 4. Small-Signal Gain vs. Frequency with Load
Capacitance and No Isolation Resistor
Pin Configurations (continued)
Figure 5. Small-Signal Gain vs. Frequency with Load
Capacitance and 27Ω Isolation Resistor
Chip Information
MAX4350 TRANSISTOR COUNT: 86
TOP VIEW
MAX4351 TRANSISTOR COUNT: 170
OUTA
1
INA-
2
8
VCC
7
OUTB
3
6
INB-
VEE 4
5
INB+
MAX4351
INA+
SOT23-8/SO
_______________________________________________________________________________________
9
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
SOT5L.EPS
SC70, 5L.EPS
MAX4350/MAX4351
Package Information
10
______________________________________________________________________________________
Ultra-Small, Low-Cost, 200MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
SOT23, 8L.EPS
SOICN.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 ____________________ 11
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4350/MAX4351
Package Information (continued)
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