Maxim MAX4278MJA, MAX4278EUA, MAX4278ESA, MAX4278EPA, MAX4178EUA Datasheet

_______________General Description

The MAX4178/MAX4278 are ±5V, wide-bandwidth, fast­settling, closed-loop buffers featuring high slew rate, high
precision, high output current, low noise, and low differen­tial 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 feed­back amplifiers. However, unlike conventional current­mode feedback amplifiers, these devices have a
unique input stage that combines the benefits of cur­rent-feedback topology with those of the traditional volt­age-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 high­speed 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 (V

OUT

= 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 Current
♦ 1µA Input Bias Current
♦ 0.5mV Input Offset Voltage
♦ 5nV/

√

HHzz

Input-Referred Voltage Noise

♦ 2pA/

√

HHzz

Input-Referred Current Noise

♦ 1.0% Max Gain Error with 100Ω Load
♦ Short-Circuit Protected
♦ 8000V ESD Protection
♦ Available in Space-Saving SOT23 Package

MAX4178/MAX4278

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

PIN­PACKAGE

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.

V

EE

1

2

8

7

N.C.
V

CC

GND

N.C.

MAX4178
MAX4278

3

4

6

5

V

EE

GNDIN

15V

CC

OUT

SOT23-5

2

34

MAX4178
MAX4278

MAX4278

V

IN

75Ω

75Ω

V

OUT

75Ω

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 [phone].
For small orders, phone [phone] ext. 3468.

MAX4178/MAX4278

330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= -5V, V

OUT

= 0V, RL= ∞, TA= T

MIN

to T

MAX

, 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....................................(V

CC

+ 0.3V) to (VEE- 0.3V)

Output Short-Circuit Duration (to GND) .....................Continuous

Continuous Power Dissipation (T

A

= +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

CONDITIONS

UNITSMIN TYP MAXSYMBOLPARAMETER

MAX4178 ±2.5 ±3.0
MAX4278

V

±1.25 ±1.5

V

IN

Input Voltage Range

0.5 2.0

µV/°C2TCV

OS

Input Offset Voltage Drift

1 3

µAI

B

Input Bias Current

MΩ1R

IN

Input Resistance

VS= ±4.5V to ±5.5V dB70 90PSRR

Power-Supply Rejection
Ratio

0.990 1.000

MAX4178 (Note 2)

0.985 1.000

1.98 2.01

MAX4278 (Note 3)

V/V

1.97 2.01

A

V

Voltage Gain

V

OUT

= ±1mV to ±2V %0.01A

V(LIN)

Gain Linearity

f = DC Ω0.1R

OUT

Output Resistance

Short to GND mA150I

SC

Short-Circuit Output Current

RL= 100Ω ±2.5 ±3.0

TA = +25°C

RL= 100Ω
RL= 50Ω
RL= 100Ω
RL= 50Ω

RL= 50Ω

V

±2.0 ±2.5

V

OUT

Output Voltage Swing

TA= +25°C 8 10

12

mA

14

TA = T

MIN

to T

MAX

I

SY

Quiescent Supply Current

MAX4_78E_ _
MAX4_78MJA

TA = -40°C to +85°C mA70 100I

OUT

Minimum Output Current

3.0

TA = T

MIN

to T

MAX

5

Note 2: Voltage Gain = (V

OUT

- VOS) / VINmeasured at VIN= ±2.5V.

Note 3: Voltage Gain = (V

OUT

- VOS) / VINmeasured at VIN= ±1.25V.

TA = +25°C

0.5 3.0

TA =
T

MIN

to T

MAX

5.0

mVV

OS

Input Offset Voltage

MAX4_78ESA/EPA/EUA/MJA
MAX4_78EUK
MAX4_78ESA/EPA/EUA/MJA
MAX4_78EUK

Note 1: Specifications for the MAX4_78EUK(SOT23 packages) are 100% tested at TA= +25°C, and guaranteed by design over

temperature.

MHz

MAX4178/MAX4278

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

Closed-Loop Buffers

_______________________________________________________________________________________ 3

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.

240 330
230 310

CONDITIONS

V

OUT

= 2V step ns2tR, t

F

Rise/Fall Times

f = 10MHz nV/√Hz5e

n

Input Voltage Noise Density

f = 10MHz pA/√Hz2i

n

Input Current Noise Density

0.04

f = 3.58MHz %

0.04

DG

Differential Gain
(Note 5)

f = 5MHz, V

OUT

= 2Vp-p dBC

-81

SFDRSpurious-Free Dynamic Range

36

fC= 10MHz,
V

OUT

= 2Vp-p

dBm

31

IP3Third-Order Intercept

UNITSMIN TYP MAXPARAMETER

MAX4278

30 150MAX4178

MAX4278

250

V

OUT

= 2Vp-p MHz

250

FPBWFull-Power Bandwidth

MAX4178

to 0.01%

10

V

OUT

= 2V step ns

12

t

S

Settling Time

to 0.1%

MAX4178
MAX4278

0.01

MAX4278

MAX4178

f = 3.58MHz degrees

0.01

DP

Differential Phase
(Note 5)

-58

MAX4278

MAX4178

fC= 10MHz,
V

OUT

= 2Vp-p

dB

-59

THDTotal Harmonic Distortion

MAX4178
MAX4278

pF1C

IN

Input Capacitance

MAX4178
MAX4278 -74

MAX4178
MAX4278

30 150

SYMBOL

800 1300MAX4178
900 1600MAX4278

V/µsV

OUT

= ±2Vp-pSR

Slew Rate
(Note 4)

MHz

V

OUT

≤

0.1Vp-p

BW

Small-Signal, -3dB Bandwidth
(Note 4)

MHz

V

OUT

≤

0.1Vp-p

BW

(0.1dB)

Small-Signal, ±0.1dB Bandwidth
(Note 4)

MAX4178/MAX4278

330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

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

2

-8
1M

10M

100M

1G

MAX4178

SMALL-SIGNAL GAIN vs. FREQUENCY

-5

-6

-7

0

-1

-2

-3

-4

1

MAX4178/4278-01

FREQUENCY (Hz)

GAIN (dB)

-0.7

1M

10M

100M

1G

MAX4178

GAIN FLATNESS vs. FREQUENCY

-0.4

-0.5

-0.6

-0.8

0.1
0

-0.1

-0.2

-0.3

0.2

MAX4178/4278-02

FREQUENCY (Hz)

GAIN (dB)

-6

1M

10M

100M

1G

MAX4178

LARGE-SIGNAL GAIN vs. FREQUENCY

-3

-4

-5

-7

2
1
0

-1

-2

3

MAX4178/4278-03

FREQUENCY (Hz)

GAIN (dB)

VO = 2Vp-p

-1

1M

10M

100M

1G

MAX4278

SMALL-SIGNAL GAIN vs. FREQUENCY

2
1
0

-2

7
6
5
4
3

8

MAX4178/4278-04

FREQUENCY (Hz)

GAIN (dB)

5.3

1M

10M

100M

1G

MAX4278

GAIN FLATNESS vs. FREQUENCY

5.6

5.5

5.4

5.2

6.1

6.0

5.9

5.8

5.7

6.2

MAX4178/4278-05

FREQUENCY (Hz)

GAIN (dB)

-6

1M

10M

100M

1G

MAX4278

LARGE-SIGNAL GAIN vs. FREQUENCY

0

-2

-4

-8

10

8
6
4
2

12

MAX4178/4278-06

FREQUENCY (Hz)

GAIN (dB)

VO = 2Vp-p

MAX4178 LARGE-SIGNAL

PULSE RESPONSE (C

L

= 0pF)

MAX4178/4278-08

TIME (10ns/div)

VOLTAGE (2V/div)

IN

OUT

GND

GND

MAX4278 SMALL-SIGNAL

PULSE RESPONSE (C

L

= 0pF)

MAX4178/4278-09

TIME (10ns/div)

VOLTAGE

IN

(50mV/

div)

OUT

(100mV/

div)

GND

GND

MAX4178 SMALL-SIGNAL

PULSE RESPONSE (C

L

= 0pF)

MAX4178/4278-07

TIME (10ns/div)

VOLTAGE (100mV/div)

IN

OUT

GND

GND