View MAX4200_47332.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-1338; Rev 2; 4/99
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers
________________General Description
The MAX4200-MAX4205 are ultra-high-speed, openloop 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 50 termination resistors, making them ideal for driving 50 transmission lines. The MAX4202/MAX4205 include 75 back-termination resistors for driving 75 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/s 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-todigital converter (ADC) inputs or for data-communications applications.
____________________________Features
o 2.2mA Supply Current o High Speed 780MHz -3dB Bandwidth (MAX4201/MAX4202) 280MHz 0.1dB Gain Flatness (MAX4201/MAX4202) 4200V/s Slew Rate o Low 2.1nV/Hz Voltage-Noise Density o Low 0.8pA/Hz Current-Noise Density o High 90mA Output Drive (MAX4200/MAX4203) o Excellent Capacitive-Load-Driving Capability o Available in Space-Saving SOT23 or MAX Packages
MAX4200-MAX4205
_______________Ordering Information
PART MAX4200ESA MAX4200EUK-T MAX4201ESA MAX4201EUK-T MAX4202ESA MAX4202EUK-T MAX4203ESA MAX4203EUA MAX4204ESA MAX4204EUA MAX4205ESA MAX4205EUA TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 8 SO 5 SOT23-5 8 SO 5 SOT23-5 8 SO 5 SOT23-5 8 SO 8 MAX 8 SO 8 MAX 8 SO 8 MAX TOP MARK -- AABZ -- ABAA -- ABAB -- -- -- -- -- --
________________________Applications
High-Speed DAC Buffers Wireless LANs Digital-Transmission Line Drivers High-Speed ADC Input Buffers IF/Communications Systems
___________________________Selector Guide
PART INTERNAL NO. OF OUTPUT BUFFERS TERMINATION () 1 1 1 2 2 2 -- 50 75 -- 50 75 PIN-PACKAGE
___________Typical Application Circuit
8 SO, 5 SOT23 8 SO, 5 SOT23 8 SO, 5 SOT23 8 SO/MAX 8 SO/MAX 8 SO/MAX
IN RT* 50 50 CABLE OUT
MAX4200 MAX4201 MAX4202 MAX4203 MAX4204 MAX4205
MAX4201
REXT* 50
Pin Configurations appear at end of data sheet.
*RL = RT + REXT
COAXIAL CABLE DRIVER
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
ABSOLUTE MAXIMUM RATINGS
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 = +70C) 5-Pin SOT23 (derate 7.1mW/C above +70C).............571mW 8-Pin MAX (derate 4.1mW/C above +70C) ..............330mW 8-Pin SO (derate 5.9mW/C above +70C)...................471mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
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 = , TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Operating Supply Voltage Quiescent Supply Current Input Offset Voltage Input Offset Voltage Drift Input Offset Voltage Matching Input Bias Current Input Resistance Voltage Gain Power-Supply Rejection Output Resistance IB RIN AV PSR ROUT -3.0V VOUT 3.0V MAX4200/MAX4203, REXT = 150 MAX4201/MAX4204, REXT = 50 MAX4202/MAX4205, REXT = 75 MAX4200/MAX4203 f = DC MAX4201/MAX4204 MAX4202/MAX4205 MAX4200/MAX4203 Output Current IOUT RL = 30 MAX4201/MAX4204 MAX4202/MAX4205 MAX4200/MAX4203 Short-Circuit Output Current ISC Sinking or sourcing MAX4201/MAX4204 MAX4202/MAX4205 RL = 150 MAX4200/MAX4203 Output Voltage Swing VOUT MAX4201/MAX4204 MAX4202/MAX4205 RL = 100 RL = 37.5 RL = 50 RL = 75 1.9 2.0 3.3 3.2 0.9 0.42 0.41 55 SYMBOL VS IS VOS TCVOS CONDITIONS Guaranteed by PSR test Per buffer, VIN = 0V VIN = 0V VIN = 0V MAX4203/MAX4204/MAX4205 MIN 4 2.2 1 20 0.4 0.8 500 0.96 0.50 0.50 72 8 50 75 90 52 44 150 90 75 3.8 3.7 3.3 2.1 2.3 V mA mA 1.1 0.58 0.59 dB V/V 10 TYP MAX 5.5 4 15 UNITS V mA mV V/C mV A k
VS = 4V to 5.5V
2
_______________________________________________________________________________________
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers
AC ELECTRICAL CHARACTERISTICS
(VCC = +5V, VEE = -5V, RL = 100 for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150 for MAX4202/MAX4205, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SYMBOL CONDITIONS MAX4200 -3dB Bandwidth BW(-3dB) VOUT 100mVRMS MAX4201/MAX4202 MAX4203 MAX4204/MAX4205 MAX4200 0.1dB Bandwidth BW(0.1dB) VOUT 100mVRMS MAX4201/MAX4202 MAX4203 MAX4204/MAX4205 Full-Power Bandwidth Slew Rate Group Delay Time Settling Time to 0.1% tS VOUT = 2V step f = 5MHz MAX4200/MAX4201/ MAX4202 Spurious-Free Dynamic Range SFDR VOUT = 2Vp-p MAX4203/MAX4204/ MAX4205 MAX4200/MAX4201/ MAX4202, f = 500kHz, VOUT = 2Vp-p Harmonic Distortion HD MAX4203/MAX4204/| MAX4205, f = 500kHz, VOUT = 2Vp-p Differential Gain Error Differential Phase Error Input Voltage Noise Density Input Current Noise Density Input Capacitance Output Impedance Amplifier Crosstalk DG DP en in CIN ZOUT XTALK f = 10MHz VOUT = 2Vp-p VOUT = 2Vp-p f = 10MHz f = 100MHz NTSC, RL = 150 NTSC, RL = 150 f = 1MHz f = 1MHz f = 20MHz f = 100MHz f = 5MHz f = 20MHz f = 100MHz Second harmonic Third harmonic Total harmonic Second harmonic Third harmonic Total harmonic FPBW SR VOUT 2Vp-p VOUT = 2V step MAX4200/MAX4201/MAX4202 MAX4203/MAX4204/MAX4205 MIN TYP 660 780 530 720 220 280 130 230 490 310 4200 405 12 -48 -45 -34 -47 -44 -32 -72 -48 -48 -83 -47 -47 1.3 0.15 2.1 0.8 2 6 -87 -65 % degrees nV/Hz pA/Hz pF dB dBc dBc MHz V/s ps ns MHz MHz MAX UNITS
MAX4200-MAX4205
_______________________________________________________________________________________
3
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
__________________________________________Typical Operating Characteristics
(VCC = +5V, VEE = -5V, RL = 100 for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150 for MAX4202/MAX4205, unless otherwise noted.)
MAX4200 SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4200/25-01
MAX4201/MAX4202 SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4200/25-02
MAX4200/MAX4201/MAX4202 LARGE-SIGNAL GAIN vs. FREQUENCY
3 2 NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 VOUT = 2Vp-p
MAX4200/25-03
4 3 2 NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 100k 1M 10M FREQUENCY (Hz) 100M VOUT = 100mVp-p
4 3 2 NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 VOUT = 100mVp-p
4
1G
100k
1M
10M
100M
1G
100k
1M
10M FREQUENCY (Hz)
100M
1G
FREQUENCY (Hz)
MAX4203 SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4200/25-04
MAX4204/MAX4205 SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4200/25-05
MAX4203/MAX4204/MAX4205 LARGE-SIGNAL GAIN vs. FREQUENCY
3 2 NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 VOUT = 2Vp-p
MAX4200/25-06
4 3 2 NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 100k 1M 10M FREQUENCY (Hz) 100M VOUT = 100mVp-p
4 3 2 NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 VOUT = 100mVp-p
4
1G
100k
1M
10M
100M
1G
10G
100k
1M
10M FREQUENCY (Hz)
100M
1G
FREQUENCY (Hz)
GROUP DELAY vs. FREQUENCY
MAX4200/25-07
POWER-SUPPLY REJECTION vs. FREQUENCY
MAX4200/25-08
SLEW RATE vs. OUTPUT VOLTAGE
8000 7000 SLEW RATE (V/s) 6000 5000 4000 3000 2000 1000 0
MAX4200/4205-09
5 4 3 GROUP DELAY (ns) 2
0 -10 -20 -30 PSR (dB) -40 -50 -60 -70 -80 -90 -100
9000
1 0 -1 -2 -3 -4 -5 100k 1M 10M 100M 1G 10G FREQUENCY (Hz)
100k
1M
10M
100M
1G
10G
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 OUTPUT VOLTAGE (Vp-p)
FREQUENCY (Hz)
4
_______________________________________________________________________________________
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
_________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RL = 100 for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150 for MAX4202/MAX4205, unless otherwise noted.)
MAX4200/MAX4201/MAX4202 HARMONIC DISTORTION vs. FREQUENCY
MAX4200/4205-10
MAX4203/MAX4204/MAX4205 HARMONIC DISTORTION vs. FREQUENCY
MAX4200/4205-11
MAX4200/MAX4203 OUTPUT IMPEDANCE vs. FREQUENCY
MAX4200/4205-12
0 -10 HARMONIC DISTORTION (dBc) -20 -30 -40 -50 -60 -70 -80 -90 -100
0 -10 HARMONIC DISTORTION (dBc) -20 -30 -40 -50 -60 -70 -80 -90 -100
VIN = 2Vp-p
VOUT = 2Vp-p
100
THIRD HARMONIC
THIRD HARMONIC
OUTPUT IMPEDANCE ()
10
SECOND HARMONIC
SECOND HARMONIC 1 100k 1M 10M 100M 100k 1M 10M FREQUENCY (Hz) 100M 1G FREQUENCY (Hz)
100k
1M
10M
100M
FREQUENCY (Hz)
MAX4201/MAX4204 OUTPUT IMPEDANCE vs. FREQUENCY
MAX4200/4205-13
MAX4202/MAX4205 OUTPUT IMPEDANCE vs. FREQUENCY
MAX4200/4205-14
MAX4203/MAX4204/MAX4205 CROSSTALK vs. FREQUENCY
-10 -20 CROSSTALK (dB) -30 -40 -50 -60 -70 -80 -90
MAX4200/4205-15
100
100
0
OUTPUT IMPEDANCE ()
10 100k 1M 10M FREQUENCY (Hz) 100M 1G
OUTPUT IMPEDANCE ()
10 100k 1M 10M FREQUENCY (Hz) 100M 1G
-100 100k 1M 10M 100M 1G 10G FREQUENCY (Hz)
INPUT VOLTAGE NOISE DENSITY vs. FREQUENCY
MAX4200/4205-16
INPUT CURRENT NOISE DENSITY vs. FREQUENCY
MAX4200/4205-17
DIFFERENTIAL GAIN AND PHASE (RL = 150)
DIFF GAIN (%) 1.0 0.5 0 -0.5 0 DIFF PHASE (deg) 0.20 0.15 0.10 0.05 0 -0.05 0 IRE 100 100
MAX4200/4205-18
100 VOLTAGE NOISE DENSITY (nV/Hz)
10 CURRENT NOISE DENSITY (pA/Hz)
1.5
10
1.0
1 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
0.1 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
_______________________________________________________________________________________
5
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
_________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RL = 100 for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150 for MAX4202/MAX4205, unless otherwise noted.)
GAIN ERROR vs. INPUT VOLTAGE
MAX4200-19
OUTPUT VOLTAGE SWING vs. EXTERNAL LOAD RESISTANCE
9 OUTPUT VOLTAGE SWING (Vp-p) MAX4200/4203 8 7 6 5 4 3 2 1 MAX4202/4205 MAX4201/4204 VOLTAGE 50mV/div OUT
MAX4200-20
SMALL-SIGNAL PULSE RESPONSE
MAX4200-21
14 12 10 8 6 4 2 0 -5 -4 -3 -2 -1 0 1 2 3 4 5 INPUT VOLTAGE (V) RL = 150 RL = 100
10
IN
GND
GAIN ERROR (%)
GND
0
50
100 150 200 250 300 350 400 EXTERNAL LOAD RESISTANCE ()
TIME (5ns/div)
MAX4200/MAX4203 SMALL-SIGNAL PULSE RESPONSE
MAX4200-22
MAX4201/MAX4202/MAX4204/MAX4205 SMALL-SIGNAL PULSE RESPONSE
MAX4200-23
LARGE-SIGNAL PULSE RESPONSE
MAX4200-24
IN
GND
IN
GND
IN
GND
VOLTAGE 50mV/div OUT GND
VOLTAGE 50mV/div OUT GND
VOLTAGE 1V/div OUT GND
CLOAD = 15pF TIME (5ns/div)
CLOAD = 22pF TIME (5ns/div) TIME (5ns/div)
6
_______________________________________________________________________________________
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
_________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RL = 100 for MAX4200/MAX4201/MAX4203/MAX4204, RL = 150 for MAX4202/MAX4205, unless otherwise noted.)
MAX4200/MAX4203 LARGE-SIGNAL PULSE RESPONSE
MAX4200-25
MAX4201/MAX4202/MAX4204/MAX4205 LARGE-SIGNAL PULSE RESPONSE
MAX4200-26
SUPPLY CURRENT (PER BUFFER) vs. TEMPERATURE
MAX4200-27
4.0 GND SUPPLY CURRENT (mA) 3.5 3.0 2.5 2.0 1.5
IN
GND
IN
VOLTAGE 1V/div OUT GND
VOLTAGE 1V/div OUT GND
CLOAD = 15pF TIME (5ns/div)
CLOAD = 22pF TIME (5ns/div)
1.0 -40 -15 10 35 60 85 TEMPERATURE (C)
INPUT OFFSET VOLTAGE vs. TEMPERATURE
MAX4200-28
INPUT BIAS CURRENT vs. TEMPERATURE
MAX4200-29
MAX4200/MAX4203 OUTPUT VOLTAGE SWING vs. TEMPERATURE
MAX4200-30
5 4 INPUT OFFSET VOLTAGE (mV) 3 2 1 0 -1 -2 -3 -4 -5 -40 -15 10 35 60
5 4 INPUT BIAS CURRENT (A) 3 2 1 0 -1 -2 -3 -4 -5
4.0 RL = 150 RL = 100
3.8 VOLTAGE SWING (Vp-p) -40 -15 10 35 60 85
3.6
3.4
3.2
3.0 -40 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C)
85
TEMPERATURE (C)
_______________________________________________________________________________________
7
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
______________________________________________________________Pin Description
PIN MAX4200/MAX4201/MAX4202 SOT23-5 1 3 -- -- 2 -- -- -- -- 5 4 -- -- SO 1, 2, 5, 8 3 -- -- 4 -- -- -- -- 6 7 -- -- MAX4203 MAX4204 MAX4205 SO/MAX -- -- 1 2 -- 3 4 5 6 -- -- 7 8 N.C. IN IN1 OUT1 VEE VEE1 VEE2 IN2 OUT2 OUT VCC VCC2 VCC1 Not Internally Connected Buffer Input Buffer 1 Input Buffer 1 Output Negative Power Supply Negative Power Supply for Buffer 1 Negative Power Supply for Buffer 2 Buffer 2 Input Buffer 2 Output Buffer Output Positive Power Supply Positive Power Supply for Buffer 2 Positive Power Supply for Buffer 1 NAME FUNCTION
_______________Detailed Description
The MAX4200-MAX4205 wide-band, open-loop buffers feature high slew rates, high output current, low 2.1nVHz voltage-noise density, and excellent capacitive-load-driving capability. The MAX4200/MAX4203 are single/dual buffers with up to 660MHz bandwidth, 230MHz 0.1dB gain flatness, and a 4200V/s slew rate. The MAX4201/MAX4204 single/dual buffers with integrated 50 output termination resistors, up to 780MHz bandwidth, 280MHz gain flatness, and a 4200V/s slew rate, are ideally suited for driving high-speed signals over 50 cables. The MAX4202/MAX4205 provide bandwidths up to 720MHz, 230MHz gain flatness, 4200V/s slew rate, and integrated 75 output termination resistors for driving 75 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 constant 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 V CC and V EE should be bypassed to the ground plane with a 0.1F capacitor located as close to the device pin as possible.
Layout Techniques
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 6GHz. Pay careful attention to inputs and outputs to avoid large parasitic 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 parasitic capacitance and inductance.
8
_______________________________________________________________________________________
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers
* 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.
MAX4200-MAX4205
50 COAX SOURCE RL 50
RT*
MAX42_ _
Input Impedance
The MAX4200-MAX4205 input impedance looks like a 500k 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. 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.
*MAX4201/4202/4204/4205 ONLY
Figure 1. Using a Properly Terminated Input Source
Output Current and Gain Sensitivity
The absence of negative feedback means that openloop 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).
Output Capacitive Loading and Stability
The MAX4200-MAX4205 provide maximum AC performance 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 performance. 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 impedance 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 amplifier's output impedance, which looks inductive at high frequency. This inductance forms an L-C resonant 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 isolation resistor like the one shown in Figure 3. Figure 4 is a plot of the MAX4200/MAX4203 frequency response with capacitive loading and a 10 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 transmission lines essentially eliminates the line's capacitance. The MAX4201/MAX4204, with their integrated 50 output termination resistors, are ideal for driving 50 cables. The MAX4202/MAX4205 include integrated 75 termination resistors for driving 75 cables. Note that the output termination resistor forms a voltage divider with the load resistance, thereby decreasing the amplitude of the signal at the receiving end of the cable by one half (see the Typical Application Circuit).
_______________________________________________________________________________________
9
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
4 3 2 GAIN (dB) 1 0 -1 -2 -3 -4 -5
VOUT = 100mVp-p
CL = 47pF CL = 68pF CL = 120pF
MAX4200-FIG02
5
RISO VIN CL VOUT
MAX4200 MAX4203
CL = 220pF
100k
1M
10M FREQUENCY (Hz)
100M
1G
Figure 2. MAX4200/MAX4203 Small-Signal Gain vs. Frequency with Load Capacitance and No Isolation Resistor
Figure 3. Driving a Capacitive Load Through an Isolation Resistor
MAX4200-FIG04
4 3 2 GAIN (dB) 1 0 -1 -2 -3 -4 -5
RISO = 10 VOUT = 100mVp-p
4 3 2 GAIN (dB) 1 0 -1 -2 -3 -4
VOUT = 100mVp-p
CL = 47pF CL = 68pF
CL = 47pF CL = 68pF CL = 120pF
CL = 120pF
100k
1M
10M FREQUENCY (Hz)
-5 100M 1G 100k 1M 10M FREQUENCY (Hz) 100M 1G
Figure 4. MAX4200/MAX4203 Small-Signal Gain vs. Frequency with Load Capacitance and 10 Isolation Resistor
Figure 5. MAX4201/MAX4202/MAX4204/MAX4205 SmallSignal Gain vs. Frequency with Capacitive Load and No External Isolation Resistor
10
______________________________________________________________________________________
MAX4200-FIG05
5
5
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers
__________________________________________________________Pin Configurations
MAX4200-MAX4205
TOP VIEW
MAX4200 MAX4201 MAX4202
N.C. 1 *RT 5 OUT N.C. 1 N.C. 2 IN 3 4 VCC VEE 4
MAX4200 MAX4201 MAX4202
8 7 *RT 6 5 N.C. VCC OUT N.C. IN1 1 OUT1 2 *RT VEE1 3 VEE2 4
MAX4203 MAX4204 MAX4205
8 7 *RT 6 5 VCC1 VCC2 OUT2 IN2
VEE 2
IN 3
SOT23-5
N.C. = NOT INTERNALLY CONNECTED
SO
* RT = 0 (MAX4200/MAX4203) RT = 50 (MAX4201/MAX4204) RT = 75 (MAX4202/MAX4205)
SO/MAX
___________________Chip Information
TRANSISTOR COUNTS: MAX4200/MAX4201/MAX4202: 33 MAX4203/MAX4204/MAX4205: 67 SUBSTRATE CONNECTED TO VEE
______________________________________________________________________________________
11
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers MAX4200-MAX4205
________________________________________________________Package Information
SOT5L.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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
8LUMAXD.EPS

▲Up To Search▲

Price & Availability of MAX4200

	To Download MAX4200 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .