MAX4200-05 Datasheet by Maxim Integrated

View All Related Products | Download PDF Datasheet
MAX4200—MAX4205 Ultra-High-S peed, Low-Noise, Low-Power,
General Description
The MAX4200–MAX4205 are ultra-high-speed, open-
loop buffers featuring high slew rate, high output current,
low noise, and excellent capacitive-load-driving capability.
The MAX4200/MAX4201/MAX4202 are single buffers,
while the MAX4203/MAX4204/MAX4205 are dual buffers.
The MAX4201/MAX4204 have integrated 50Ω termination
resistors, making them ideal for driving 50Ω transmission
lines. The MAX4202/MAX4205 include 75Ω back-
termination resistors for driving 75Ω transmission lines.
The MAX4200/MAX4203 have no internal termination
resistors.
The MAX4200–MAX4205 use a proprietary architecture
to achieve up to 780MHz -3dB bandwidth, 280MHz 0.1dB
gain flatness, 4200V/μs slew rate, and ±90mA output current
drive capability. They operate from ±5V supplies and draw
only 2.2mA of quiescent current. These features, along
with low-noise performance, make these buffers suitable
for driving high-speed analog-to-digital converter (ADC)
inputs or for data-communications applications.
Features
2.2mA Supply Current
High Speed
780MHz -3dB Bandwidth (MAX4201/MAX4202)
280MHz 0.1dB Gain Flatness (MAX4201/MAX4202)
4200V/μs Slew Rate
Low 2.1nV/√Hz Voltage-Noise Density
Low 0.8pA/√Hz Current-Noise Density
High ±90mA Output Drive (MAX4200/MAX4203)
Excellent Capacitive-Load-Driving Capability
Available in Space-Saving SOT23 or μMAX®
Packages
Applications
High-Speed DAC Buffers
Wireless LANs
Digital-Transmission Line Drivers
High-Speed ADC Input Buffers
IF/Communications Systems
19-1338; Rev 4; 12/17
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Click here for production status of specific part numbers.
MAX4201
R
EXT
*
50
*
R
L
= R
T
+ R
EXT
R
T
*
5050 CABLE
OUTIN
COAXIAL CABLE DRIVER
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
Typical Application Circuit
Supply Voltage (VCC to VEE) ..............................................+12V
Voltage on Any Pin to GND ........... (VEE - 0.3V) to (VCC + 0.3V)
Output Short-Circuit Duration to GND .......................Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ..........571mW
8-Pin μMAX (derate 4.1mW/°C above +70°C) ............330mW
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
Soldering Temperature (reflow) ........................................+260°C
Junction Temperature ...................................................... +150°C
(VCC = +5V, VEE = -5V, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage VSGuaranteed by PSR test ±4 ±5.5 V
Quiescent Supply Current ISPer buffer, VIN = 0V 2.2 4 mA
Input Offset Voltage VOS VIN = 0V 1 15 mV
Input Offset Voltage Drift TCVOS VIN = 0V 20 μV/°C
Input Offset Voltage
Matching MAX4203/MAX4204/MAX4205 0.4 mV
Input Bias Current IB0.8 10 μA
Input Resistance RIN (Note 1) 500
Voltage Gain AV
-3.0V ≤
VOUT
3.0V
MAX4200/MAX4203, REXT = 150Ω 0.9 0.96 1.1
V/VMAX4201/MAX4204, REXT = 50Ω 0.42 0.50 0.58
MAX4202/MAX4205, REXT = 75Ω 0.41 0.50 0.59
Power-Supply Rejection PSR VS = ±4V to ±5.5V 55 72 dB
Output Resistance ROUT f = DC
MAX4200/MAX4203 8
ΩMAX4201/MAX4204 50
MAX4202/MAX4205 75
Output Current IOUT RL = 30Ω
MAX4200/MAX4203 ±90
mAMAX4201/MAX4204 ±52
MAX4202/MAX4205 ±44
Short-Circuit Output Current ISC Sinking or sourcing
MAX4200/MAX4203 150
mAMAX4201/MAX4204 90
MAX4202/MAX4205 75
Output-Voltage Swing VOUT
MAX4200/MAX4203
RL = 150Ω ±3.3 ±3.8
V
RL = 100Ω ±3.2 ±3.7
RL = 37.5Ω ±3.3
MAX4201/MAX4204 RL = 50Ω ±1.9 ±2.1
MAX4202/MAX4205 RL = 75Ω ±2.0 ±2.3
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
2
Absolute Maximum Ratings
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 = -5V, RL = 100Ω for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150Ω for MAX4202/MAX4205, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
Note 1: Tested with no load; increasing load will decrease input impedance.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
-3dB Bandwidth BW(-3dB) VOUT ≤ 100mVRMS
MAX4200 660
MHz
MAX4201/MAX4202 780
MAX4203 530
MAX4204/MAX4205 720
0.1dB Bandwidth BW(0.1dB) VOUT ≤ 100mVRMS
MAX4200 220
MHz
MAX4201/MAX4202 280
MAX4203 130
MAX4204/MAX4205 230
Full-Power Bandwidth FPBW VOUT ≤ 2VP-P
MAX4200/MAX4201/MAX4202 490 MHz
MAX4203/MAX4204/MAX4205 310
Slew Rate SR VOUT = 2V step 4200 V/μs
Group Delay Time 405 ps
Settling Time to 0.1% tSVOUT = 2V step 12 ns
Spurious-Free Dynamic
Range SFDR VOUT =
2VP-P
MAX4200/MAX4201/
MAX4202
f = 5MHz -48
dBc
f = 20MHz -45
f = 100MHz -34
MAX4203/MAX4204/
MAX4205
f = 5MHz -47
f = 20MHz -44
f = 100MHz -32
Harmonic Distortion HD
MAX4200/MAX4201/
MAX4202, f = 500kHz,
VOUT = 2VP-P
Second harmonic -72
dBc
Third harmonic -48
Total harmonic -48
MAX4203/MAX4204/
MAX4205, f = 500kHz,
VOUT = 2VP-P
Second harmonic -83
Third harmonic -47
Total harmonic -47
Differential Gain Error DG NTSC, RL = 150Ω 1.3 %
Differential Phase Error DP NTSC, RL = 150Ω 0.15 degrees
Input Voltage-Noise Density enf = 1MHz 2.1 nV/√Hz
Input Current-Noise Density inf = 1MHz 0.8 pA/√Hz
Input Capacitance CIN 2 pF
Output Impedance ZOUT f = 10MHz 6 Ω
Amplifier Crosstalk XTALK VOUT = 2VP-P
f = 10MHz -87 dB
f = 100MHz -65
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
3
AC Electrical Characteristics (continued)
52 2,8 $34352 E2 Zia 335,302 g; H E413; ~23: 5353. G x1553. a2 2% SEEK? E2 2,8 33%;? E2 51 a2 2% SEEK? E2 2% RENEE? E; Ema mama
(VCC = +5V, VEE = -5V, RL = 100Ω for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150Ω for MAX4202/MAX4205, unless otherwise
noted.)
4
-6
100k 1M 10M 100M 1G
MAX4201/MAX4202
SMALL-SIGNAL GAIN vs. FREQUENCY
-4
-5
-3
MAX4200/25-02
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-2
-1
0
2
1
3VOUT = 100mVP-P
4
-6
100k 1M 10M 100M 1G
MAX4200/MAX4201/MAX4202
LARGE-SIGNAL GAIN vs. FREQUENCY
-4
-5
-3
MAX4200/25-03
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-2
-1
0
2
1
3VOUT = 2VP-P
4
-6
100k 1M 10M 100M 1G
MAX4203
SMALL-SIGNAL GAIN vs. FREQUENCY
-4
-5
-3
MAX4200/25-04
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-2
-1
0
2
1
3VOUT = 100mVP-P
4
-6
100k 1M 10M 100M 1G
10G
MAX4204/MAX4205
SMALL-SIGNAL GAIN vs. FREQUENCY
-4
-5
-3
MAX4200/25-05
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-2
-1
0
2
1
3VOUT = 100mVP-P
4
-6
100k 1M 10M 100M 1G
MAX4203/MAX4204/MAX4205
LARGE-SIGNAL GAIN vs. FREQUENCY
-4
-5
-3
MAX4200/25-06
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-2
-1
0
2
1
3VOUT = 2VP-P
5
-5
100k 1M 10M 100M 1G
10G
GROUP DELAY vs. FREQUENCY
-3
-4
-2
MAX4200/25-07
FREQUENCY (Hz)
GROUP DELAY (ns)
-1
0
1
3
2
4
4
-6
100k 1M 10M 100M 1G
MAX4200
SMALL-SIGNAL GAIN vs. FREQUENCY
-4
-5
-3
MAX4200/25-01
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-2
-1
0
2
1
3VOUT = 100mVP-P
0
-100
100k 1M 10M 100M 1G
10G
POWER-SUPPLY REJECTION
vs. FREQUENCY
-80
-90
-70
MAX4200/25-08
FREQUENCY (Hz)
PSR (dB)
-60
-50
-40
-20
-30
-10
9000
0
01.0 3.02.5 5.0
SLEW RATE vs. OUTPUT VOLTAGE
3000
2000
1000
4000
7000
8000
MAX4200/4205-09
OUTPUT VOLTAGE (Vp-p)
SLEW RATE (V/µs)
1.5 2.00.5 3.5
5000
6000
4.0 4.5
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
Maxim Integrated
4
www.maximintegrated.com
Typical Operating Characteristics
{a E 3. c 3155 G : 93$; 55053125150 £2 54585 TH‘RD HARMON‘C :3 755555 929521 :1 553%: 5&8 3:32 Emzwo wwoz E118 an $9 .6593 2.625: a. 65312, 5159 :1 55 £23 ”902 ”3:9,
(VCC = +5V, VEE = -5V, RL = 100Ω for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150Ω for MAX4202/MAX4205, unless otherwise
noted.)
0
-10
-100
100k
100M
10M1M
MAX4200/MAX4201/MAX4202
HARMONIC DISTORTION vs. FREQUENCY
-60
-70
-80
-90
-30
-40
-50
-20
MAX4200/4205-10
FREQUENCY (Hz)
HARMONIC DISTORTION (dBc)
THIRD HARMONIC
SECOND HARMONIC
VIN = 2Vp-p 0
-10
-100
100k
100M
10M1M
MAX4203/MAX4204/MAX4205
HARMONIC DISTORTION vs. FREQUENCY
-60
-70
-80
-90
-30
-40
-50
-20
MAX4200/4205-11
FREQUENCY (Hz)
HARMONIC DISTORTION (dBc)
THIRD HARMONIC
SECOND HARMONIC
VOUT = 2Vp-p 100
1
100k 10M 100M1M 1G
MAX4200/MAX4203
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4200/4205-12
FREQUENCY (Hz)
OUTPUT IMPEDANCE ()
10
100
10
100k 10M 100M1M 1G
MAX4201/MAX4204
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4200/4205-13
FREQUENCY (Hz)
OUTPUT IMPEDANCE ()
100
10
100k 10M 100M1M 1G
MAX4202/MAX4205
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4200/4205-14
FREQUENCY (Hz)
OUTPUT IMPEDANCE ()
0
-100
100k 1M 10M 100M 1G
10G
MAX4203/MAX4204/MAX4205
CROSSTALK vs. FREQUENCY
-80
-90
MAX4200/4205-15
FREQUENCY (Hz)
CROSSTALK (dB)
-60
-70
-40
-50
-20
-30
-10
100
1
110 100 1k 10k 100k 1M
10M
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
MAX4200/4205-16
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY (nV/Hz)
10
10
0.1
110 100 1k 10k 100k 1M
10M
INPUT CURRENT-NOISE DENSITY
vs. FREQUENCY
MAX4200/4205-17
FREQUENCY (Hz)
CURRENT NOISE DENSITY (pA/Hz)
1.0
-0.05
0
100
0 100
DIFFERENTIAL GAIN AND PHASE
(RL = 150)
-0.5
0
0
0.05
0.5
0.10
1.0
0.20
0.15
1.5
IRE
DIFF PHASE (deg)
DIFF GAIN (%)
MAX4200/4205-18
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
Maxim Integrated
5
www.maximintegrated.com
Typical Operating Characteristics (continued)
MAmm mzm ONSE “ F J __”‘J MAX‘Zfl PONSE ,, 0N5; ONSF [— V%L r jfl r‘ {H 7" W 7' fir ‘ #_ 41 ,, m i, A 7 H_ ‘ fl _~__ . f \ f x f \ J _} V‘y J k‘___; a My
(VCC = +5V, VEE = -5V, RL = 100Ω for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150Ω for MAX4202/MAX4205, unless otherwise
noted.)
0
4
2
8
6
12
10
14
-5 -3 -2-4 -1 0 1 2 3 4 5
GAIN ERROR vs. INPUT VOLTAGE
MAX4200-19
INPUT VOLTAGE (V)
GAIN ERROR (%)
RL = 100
RL = 150
1
3
2
6
5
4
9
8
7
10
0 150 20050 100 250 300 350 400
OUTPUT VOLTAGE SWING vs.
EXTERNAL LOAD RESISTANCE
MAX4200-20
EXTERNAL LOAD RESISTANCE ()
OUTPUT VOLTAGE SWING (V
p-p)
MAX4200/4203
MAX4201/4204
MAX4202/4205
IN
VOLTAGE
50mV/div
OUT
GND
GND
TIME (5ns/div)
SMALL-SIGNAL PULSE RESPONSE
MAX4200-21
IN
VOLTAGE
50mV/div
OUT
GND
GND
TIME (5ns/div)
MAX4200/MAX4203
SMALL-SIGNAL PULSE RESPONSE
MAX4200-22
CLOAD = 15pF
IN
VOLTAGE
50mV/div
OUT
GND
GND
TIME (5ns/div)
MAX4201/MAX4202/MAX4204/MAX4205
SMALL-SIGNAL PULSE RESPONSE
MAX4200-23
CLOAD = 22pF
IN
VOLTAGE
1V/div
OUT
GND
GND
TIME (5ns/div)
LARGE-SIGNAL PULSE RESPONSE
MAX4200-24
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
Maxim Integrated
6
www.maximintegrated.com
Typical Operating Characteristics (continued)
AX420 ONSE ONSE J V I“? F“ _4 22:913 m5 5%, SE wogoiwmto Sm;
(VCC = +5V, VEE = -5V, RL = 100Ω for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150Ω for MAX4202/MAX4205, unless otherwise
noted.)
IN
VOLTAGE
1V/div
OUT
GND
GND
TIME (5ns/div)
MAX4200/MAX4203
LARGE-SIGNAL PULSE RESPONSE
MAX4200-25
CLOAD = 15pF
IN
VOLTAGE
1V/div
OUT
TIME (5ns/div)
MAX4201/MAX4202/MAX4204/MAX4205
LARGE-SIGNAL PULSE RESPONSE
MAX4200-26
CLOAD = 22pF
1.0
2.0
1.5
3.0
2.5
3.5
4.0
-40 10-15 35 60 85
SUPPLY CURRENT (PER BUFFER)
vs. TEMPERATURE
MAX4200-27
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
-5
-2
-3
-4
-1
0
1
2
3
4
5
-40 10-15 35 60 85
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX4200-28
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
-5
-2
-3
-4
-1
0
1
2
3
4
5
-40 10-15 35 60 85
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX4200-29
TEMPERATURE (°C)
INPUT BIAS CURRENT (µA)
3.0
3.2
3.6
3.4
3.8
4.0
-40 10-15 35 60 85
MAX4200/MAX4203
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
MAX4200-30
TEMPERATURE (°C)
VOLTAGE SWING (Vp-p)
RL = 100
RL = 150
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
Maxim Integrated
7
www.maximintegrated.com
Typical Operating Characteristics (continued)
C C
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
8
PIN
NAME FUNCTION
MAX4200/MAX4201/MAX4202 MAX4203
MAX4204
MAX4205
SOT23-5 SO SO/µMAX
1 1, 2, 5, 8 N.C. No Connection. Not Internally Connected
3 3 IN Buffer Input
1 IN1 Buffer 1 Input
2 OUT1 Buffer 1 Output
2 4 — VEE Negative Power Supply
3 VEE1 Negative Power Supply for Buffer 1
4 VEE2 Negative Power Supply for Buffer 2
5 IN2 Buffer 2 Input
6 OUT2 Buffer 2 Output
5 6 OUT Buffer Output
4 7 — VCC Positive Power Supply
7 VCC2 Positive Power Supply for Buffer 2
8 VCC1 Positive Power Supply for Buffer 1
Pin Description
TOP VIEW
N.C. = NOT INTERNALLY CONNECTED
* RT = 0Ω (MAX4200/MAX4203)
RT = 50Ω (MAX4201/MAX4204)
RT = 75Ω (MAX4202/MAX4205)
OUT2
VEE1
IN2VEE2
1
2
VCC1
VCC2
OUT1
IN1
MAX4203
MAX4204
MAX4205
MAX4200
MAX4201
MAX4202
MAX4200
MAX4201
MAX4202
SO/µMAX
3
4
OUT
IN
N.C.
VEE
1
2
8
7
N.C.
VCC
N.C.
N.C.
SO
3
4
6
5
VEE
VCC
IN
15OUT
N.C.
SOT23-5
2
34
*RT
*RT*RT*RT
8
7
6
5
Pin Configurations
Detailed Description
The MAX4200–MAX4205 wide-band, open-loop buffers
feature high slew rates, high output current, low 2.1nV√Hz
voltage-noise density, and excellent capacitive-load-driv-
ing capability. The MAX4200/MAX4203 are single/dual
buffers with up to 660MHz bandwidth, 230MHz 0.1dB
gain flatness, and a 4200V/μs slew rate. The MAX4201/
MAX4204 single/dual buffers with integrated 50Ω output
termination resistors, up to 780MHz bandwidth, 280MHz
gain flatness, and a 4200V/μs slew rate, are ideally suited
for driving high-speed signals over 50Ω cables. The
MAX4202/MAX4205 provide bandwidths up to 720MHz,
230MHz gain flatness, 4200V/μs slew rate, and integrated
75Ω output termination resistors for driving 75Ω cables.
With an open-loop gain that is slightly less than +1V/V,
these devices do not have to be compensated with the
internal dominant pole (and its associated phase shift)
that is present in voltage-feedback devices. This feature
allows the MAX4200–MAX4205 to achieve a nearly con-
stant group delay time of 405ps over their full frequency
range, making them well suited for a variety of RF and IF
signal-processing applications.
These buffers operate with ±5V supplies and consume
only 2.2mA of quiescent supply current per buffer while
providing up to ±90mA of output current drive capability.
Applications Information
Power Supplies
The MAX4200–MAX4205 operate with dual supplies from
±4V to ±5.5V. Both VCC and VEE should be bypassed to
the ground plane with a 0.1μF capacitor located as close
to the device pin as possible.
Layout Techniques
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 6GHz. 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:
Do not use wire-wrap boards, because they are too
inductive.
Do not use IC sockets, because they increase para-
sitic capacitance and inductance.
Use surface-mount instead of through-hole compo-
nents 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 pos-
sible. Do not make 90° turns; round all corners.
Input Impedance
The MAX4200–MAX4205 input impedance looks like
a 500kΩ resistor in parallel with a 2pF capacitor. Since
these devices operate without negative feedback, there
is no loop gain to transform the input impedance upward,
as in closed-loop buffers. As a consequence, the input
impedance is directly related to the output impedance. If
the output load impedance decreases, the input imped-
ance also decreases. Inductive input sources (such as an
unterminated cable) may react with the input capacitance
and produce some peaking in the buffer’s frequency
response. This effect can usually be minimized by using
a properly terminated transmission line at the buffer input,
as shown in Figure 1.
Output Current and Gain Sensitivity
The absence of negative feedback means that open-loop
buffers have no loop gain to reduce their effective output
impedance. As a result, open-loop devices usually suffer
from decreasing gain as the output current is decreased.
The MAX4200–MAX4205 include local feedback around
the buffer’s class-AB output stage to ensure low output
impedance and reduce gain sensitivity to load variations.
This feedback also produces demand-driven current bias
to the output transistors for ±90mA (MAX4200/MAX4203)
drive capability that is relatively independent of the output
voltage (see Typical Operating Characteristics).
Figure 1. Using a Properly Terminated Input Source
MAX42_ _
RL
50
*MAX4201/4202/4204/4205 ONLY
RT*
50 COAX
SOURCE
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
9
Output Capacitive Loading and Stability
The MAX4200–MAX4205 provide maximum AC per-
formance with no load capacitance. This is the case
when the load is a properly terminated transmission line.
However, these devices are designed to drive any load
capacitance without oscillating, but with reduced AC per-
formance.
Since the MAX4200–MAX4205 operate in an open-
loop configuration, there is no negative feedback to be
transformed into positive feedback through phase shift
introduced by a capacitive load. Therefore, these devices
will not oscillate with capacitive loading, unlike similar
buffers operating in a closed-loop configuration. However,
a capacitive load reacting with the buffer’s output imped-
ance can still affect circuit performance. A capacitive load
will form a lowpass filter with the buffer’s output resistance,
thereby limiting system bandwidth. With higher capacitive
loads, bandwidth is dominated by the RC network formed
by RT and CL; the bandwidth of the buffer itself is much
higher. Also note that the isolation resistor forms a divider
that decreases the voltage delivered to the load.
Another concern when driving capacitive loads results
from the amplifiers output impedance, which looks induc-
tive at high frequency. This inductance forms an L-C reso-
nant circuit with the capacitive load and causes peaking in
the buffer’s frequency response.
Figure 2 shows the frequency response of the MAX4200/
MAX4203 under different capacitive loads. To settle
out some of the peaking, the output requires an isola-
tion resistor like the one shown in Figure 3. Figure 4 is
a plot of the MAX4200/MAX4203 frequency response
with capacitive loading and a 10Ω isolation resistor.
In many applications, the output termination resistors
included in the MAX4201/MAX4202/ MAX4204/MAX4205
will serve this purpose, reducing component count and
board space. Figure 5 shows the MAX4201/MAX4202/
MAX4204/MAX4205 frequency response with capacitive
loads of 47pF, 68pF, and 120pF.
Coaxial Cable Drivers
Coaxial cable and other transmission lines are easily
driven when properly terminated at both ends with their
characteristic impedance. Driving back-terminated trans-
mission lines essentially eliminates the line’s capacitance.
The MAX4201/MAX4204, with their integrated 50Ω output
termination resistors, are ideal for driving 50Ω cables.
The MAX4202/MAX4205 include integrated 75Ω termina-
tion resistors for driving 75Ω cables. Note that the output
termination resistor forms a voltage divider with the load
resistance, thereby decreasing the amplitude of the sig-
nal at the receiving end of the cable by one half (see the
Typical Application Circuit).
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
10
Figure 2. MAX4200/MAX4203 Small-Signal Gain vs.
Frequency with Load Capacitance and No Isolation Resistor
Figure 4. MAX4200/MAX4203 Small-Signal Gain vs.
Frequency with Load Capacitance and 10Ω Isolation Resistor
Figure 3. Driving a Capacitive Load Through an Isolation
Resistor
Figure 5. MAX4201/MAX4202/MAX4204/MAX4205 Small-
Signal Gain vs. Frequency with Capacitive Load and No
External Isolation Resistor
5
-5
100k 1M 10M 100M 1G
-3
-4
-2
MAX4200-FIG02
FREQUENCY (Hz)
GAIN (dB)
-1
0
1
3
2
4CL = 47pF
VOUT = 100mVP-P
CL = 68pF
CL = 120pF
CL = 220pF
5
-5
100k 1M 10M 100M 1G
-3
-4
-2
MAX4200-FIG04
FREQUENCY (Hz)
GAIN (dB)
-1
0
1
3
2
4
CL = 47pF
CL = 68pF
CL = 120pF
RISO = 10
VOUT = 100mVP-P
MAX4200
MAX4203
RISO
CL
VIN VOUT
5
-5
100k 1M 10M 100M 1G
-3
-4
-2
MAX4200-FIG05
FREQUENCY (Hz)
GAIN (dB)
-1
0
1
3
2
4
CL = 47pF
CL = 68pF
CL = 120pF
VOUT = 100mVP-P
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
11
PACKAGE
TYPE
PACKAGE
CODE OUTLINE NO. LAND PATTERN
NO.
8-SOIC S8-2 21-0041 90-0096
5-SOT23 U5-1 21-0052 90-0174
8-µMAX U8-1 21-0036 90-0092
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character,
but the drawing pertains to the package regardless of RoHS
status.
Chip Information
TRANSISTOR COUNTS:
MAX4200/MAX4201/MAX4202: 33
MAX4203/MAX4204/MAX4205: 67
SUBSTRATE CONNECTED TO VEE
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
www.maximintegrated.com Maxim Integrated
12
PART NO. OF
BUFFERS
INTERNAL
OUTPUT
TERMINATION
(Ω)
PIN-PACKAGE
MAX4200 1 8 SO, 5 SOT23
MAX4201 1 50 8 SO, 5 SOT23
MAX4202 1 70 8 SO, 5 SOT23
MAX4203 2 8 SO/μMAX
MAX4204 2 50 8 SO/μMAX
MAX4205 2 75 8 SO/μMAX
Selector Guide
Note: All devices are specified over the -40°C to +85°C operat-
ing temperature range.
PART PIN-PACKAGE TOP
MARK
PKG
CODE
MAX4200ESA 8 SO S8-2
MAX4200EUK-T 5 SOT23-5 AABZ U5-1
MAX4201ESA 8 SO S8-2
MAX4201EUK-T 5 SOT23-5 ABAA U5-1
MAX4202ESA 8 SO S8-2
MAX4202EUK-T 5 SOT23-5 ABAB U5-1
MAX4203ESA 8 SO S8-2
MAX4203EUA-T 8 µMAX-8 U8-1
MAX4204ESA 8 SO S8-2
MAX4204EUA-T 8 µMAX-8 U8-1
MAX4205ESA 8 SO S8-2
MAX4205EUA-T 8 µMAX-8 U8-1
Ordering Information
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX4200–MAX4205 Ultra-High-Speed, Low-Noise, Low-Power,
SOT23 Open-Loop Buffers
© 2017 Maxim Integrated Products, Inc.
13
REVISION
NUMBER
REVISION
DATES DESCRIPTION PAGES
CHANGED
4 12/17 Updated Absolute Maximum Ratings section 2
Revision History
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

Products related to this Datasheet

IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 1 CIRCUIT SOT23-5
IC BUFFER 1 CIRCUIT SOT23-5
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 1 CIRCUIT SOT23-5
IC BUFFER 1 CIRCUIT SOT23-5
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8UMAX
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 2 CIRCUIT 8SOIC
IC BUFFER 1 CIRCUIT SOT23-5
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 1 CIRCUIT SOT23-5
IC BUFFER 1 CIRCUIT 8SOIC
IC BUFFER 1 CIRCUIT SOT23-5