MAX4178 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 330MHz, Gain of +1/Gain of @ Closed-Loop Buffers

19-0468; Rev 1; 5/97
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330MHz, Gain of +1/Gain of +2
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/MAX4278 feature 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/MAX4278 are ideally suited for driving
50Ω or 75Ω loads. 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
o High Speed:
330MHz -3dB Bandwidth (MAX4178)
310MHz -3dB Bandwidth (MAX4278)
250MHz Full-Power Bandwidth (V_OUT = 2Vp-p)
150MHz 0.1dB Flatness Bandwidth
1300V/µs Slew Rate (MAX4178)
1600V/µs Slew Rate (MAX4278)
o Low Differential Phase/Gain Error: 0.01°/0.04%
o 8mA Supply Current
o 1µA Input Bias Current
o 0.5mV Input Offset Voltage
o 5nV/_√Hz Input-Referred Voltage Noise
o 2pA/_√Hz Input-Referred Current Noise
o 1.0% Max Gain Error with 100Ω Load
o Short-Circuit Protected
o 8000V ESD Protection
o Available in Space-Saving SOT23 Package
______________Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
SOT
TOP MARK
MAX4178EPA -40°C to +85°C 8 Plastic DIP
–
MAX4178ESA -40°C to +85°C 8 SO
–
MAX4178EUA -40°C to +85°C 8 µMAX
–
MAX4178EUK-T -40°C to +85°C 5 SOT23
ABYX
MAX4178MJA -55°C to +125°C 8 CERDIP
–
Ordering Information continued at end of data sheet.
__________Typical Operating Circuit ^{_________________Pin Configurations}
TOP VIEW
V_IN
75Ω
75Ω
MAX4278
VIDEO/RF CABLE DRIVER
V_OUT
75Ω
OUT 1
V_EE 2
IN 3
MAX4178
MAX4278
5 V_CC N.C. 1
GND 2
IN 3
4 GND ^{VEE 4}
MAX4178
MAX4278
8 N.C.
7 VCC
6 OUT
5 N.C.
SOT23-5
DIP/SO/µMAX
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