_______________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

50

Ω 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)

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/

√H

Hzz Input-Referred Voltage Noise

o 2pA/

√H

Hzz Input-Referred Current Noise

o 1.0% Max Gain Error with 100

Ω Load

o Short-Circuit Protected

o 8000V ESD Protection

o Available in Space-Saving SOT23 Package

330MHz, Gain of +1/Gain of +2

Closed-Loop Buffers

________________________________________________________________

Maxim Integrated Products

1

19-0468; Rev 1; 5/97

PART

MAX4178EPA

MAX4178ESA

MAX4178EUA

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

8 Plastic DIP

8 SO

8 µMAX

EVALUATION

KIT MANUAL

FOLLOWS

DATA

SHEET

______________Ordering Information

Ordering Information continued at end of data sheet.

DIP/SO/

µMAX

TOP VIEW

OUT

IN

N.C.

1

2

8

7

N.C.

GND

N.C.

MAX4178

MAX4278

3

4

6

5

GND

IN

15

OUT

SOT23-5

2

34

MAX4178

MAX4278

MAX4278

75

Ω

75

Ω

75

Ω

VIDEO/RF CABLE DRIVER

_________________Pin Configurations

__________Typical Operating Circuit

MAX4178MJA

-55°C to +125°C 8 CERDIP

MAX4178EUK-T

-40°C to +85°C

5 SOT23

SOT

TOP MARK

–

–

–

–

ABYX

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.