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MAX4278ESAMAXIN/a881avai330MHz / Gain of !/Gain of @ Closed-Loop Buffers
MAX4278EPAMAXIMN/a25avai330MHz / Gain of !/Gain of @ Closed-Loop Buffers
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MAX4278EPAMAXIM ?N/a42avai330MHz / Gain of !/Gain of @ Closed-Loop Buffers
MAX4278ESAMAXIM,MAXIMN/a25000avai330MHz / Gain of !/Gain of @ Closed-Loop Buffers


MAX4278ESA ,330MHz / Gain of !/Gain of @ Closed-Loop BuffersMAX4178/MAX427819-0468; Rev 1; 5/97330MHz, Gain of +1/Gain of +2 Closed-Loop Buffers_______________
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MAX4278EPA-MAX4278ESA-MAX4278EUA
330MHz / Gain of !/Gain of @ Closed-Loop Buffers
_______________General Description
The MAX4178/MAX4278 are ±5V, wide-bandwidth, fast-
settling, closed-loop buffers featuring high slew rate, high
precision, high output current, low noise, and low differen-
tial gain and phase errors. The MAX4178, with a -3dB
bandwidth of 330MHz, is preset for unity voltage gain
(0dB). The MAX4278 is preset for a voltage gain of +2
(6dB) and has a 310MHz -3dB bandwidth.
The MAX4178/MAX4278feature the high slew rate and
low power that are characteristic of current-mode feed-
back amplifiers. However, unlike conventional current-
mode feedback amplifiers, these devices have a
unique input stage that combines the benefits of cur-
rent-feedback topology with those of the traditional volt-
age-feedback topology. This combination results in low
input offset voltage and bias current, low noise, and
high gain precision and power-supply rejection.
The MAX4178/MAX4278are ideally suited for driving
50Ωor 75Ωloads. They are the perfect choice for high-
speed cable-driving applications, such as video routing.
The MAX4178/MAX4278 are available in DIP, SO, and
space-saving µMAX and SOT23 packages.
________________________Applications

Broadcast and High-Definition TV Systems
Video Switching and Routing
High-Speed Cable Drivers
Communications
Medical Imaging
Precision High-Speed DAC/ADC Buffers
____________________________Features
High Speed:
330MHz -3dB Bandwidth (MAX4178)
310MHz -3dB Bandwidth (MAX4278)
250MHz Full-Power Bandwidth (VOUT= 2Vp-p)
150MHz 0.1dB Flatness Bandwidth
1300V/µs Slew Rate (MAX4178)
1600V/µs Slew Rate (MAX4278)
Low Differential Phase/Gain Error: 0.01°/0.04%8mA Supply Current1µA Input Bias Current 0.5mV Input Offset Voltage 5nV/√HHzzInput-Referred Voltage Noise 2pA/√HHzzInput-Referred Current Noise1.0% Max Gain Error with 100ΩLoadShort-Circuit Protected8000V ESD ProtectionAvailable in Space-Saving SOT23 Package
MAX4178/MAX4278
330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers

19-0468; Rev 1; 5/97
_________________Pin Configurations__________Typical Operating Circuit
MAX4178/MAX4278
330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= -5V, VOUT= 0V, RL= ∞, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°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.
Supply Voltage (VCCto VEE)..................................................12V
Input Voltage....................................(VCC+ 0.3V) to (VEE- 0.3V)
Output Short-Circuit Duration (to GND).....................Continuous
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C)...........727mW
SO (derate 5.88mW/°C above +70°C)........................471mW
µMAX (derate 4.10mW/°C above +70°C)...................330mW
CERDIP (derate 8.00mW/°C above +70°C)................640mW
SOT23 (derate 7.10mW/°C above +70°C)..................571mW
Operating Temperature Ranges (Note 1)
MAX4178E_A/MAX4278E_A...........................-40°C to +85°C
MAX4178EUK/MAX4278EUK.........................-40°C to +85°C
MAX4178MJA/MAX4278MJA.......................-55°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
Note 2:
Voltage Gain = (VOUT- VOS) / VINmeasured at VIN= ±2.5V.
Note 3:
Voltage Gain = (VOUT- VOS) / VINmeasured at VIN= ±1.25V.
Note 1:
Specifications for the MAX4_78EUK(SOT23 packages) are 100% tested at TA= +25°C, and guaranteed by design over
temperature.
MAX4178/MAX4278
330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers
AC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= -5V, RL= 100Ω, TA= +25°C, unless otherwise noted.)
Note 4:
Minimum AC specifications are guaranteed by sample test on the MAX4_78ESA only.
Note 5:
Tested with a 3.58MHz video test signal with an amplitude of 40IRE superimposed on a linear ramp (0 to 100IRE). An IRE is
a unit of video signal amplitude developed by the Institute of Radio Engineers. 140IRE = 1V in color systems.
MAX4178/MAX4278
330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers
__________________________________________Typical Operating Characteristics

(VCC= +5V, VEE= -5V, RL= 100Ω, CL= 0pF, TA = +25°C, unless otherwise noted.)
MAX4178/MAX4278
330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers
____________________________Typical Operating Characteristics (continued)

(VCC= +5V, VEE= -5V, RL= 100Ω, CL= 0pF, TA = +25°C, unless otherwise noted.)
MAX4178/MAX4278
330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers
____________________________Typical Operating Characteristics (continued)

(VCC= +5V, VEE= -5V, RL= 100Ω, CL= 0pF, TA = +25°C, unless otherwise noted.)
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