Maxim MAX4445ESE, MAX4444ESE Datasheet

Ultra-High-Speed, Low-Distortion, Differential-

to-Single-Ended Line Receivers with Enable

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General Description

The MAX4444/MAX4445 differential line receivers offer
unparalleled high-speed, low-distortion performance.
Using a three op amp instrumentation amplifier archi­tecture, these ICs have symmetrical differential inputs
and a single-ended output. They operate from ±5V
supplies and are capable of driving a 100Ω load to
±3.7V. The MAX4444 has an internally set closed-loop
gain of +2V/V, while the MAX4445 is compensated for
gains of +2V/V or greater, set by an external resistor. A
low-power enable mode reduces current consumption
to 3.5mA.

Using current-feedback techniques, the MAX4444/
MAX4445 achieve a 550MHz bandwidth while maintain­ing up to a 5000V/µs slew rate. Excellent differential
gain/phase and noise specifications make these ampli­fiers ideal for a wide variety of video and RF signal-pro­cessing applications. An evaluation kit is available to
speed design.

Applications

Differential-to-Single-Ended Conversion
Twisted-Pair to Coaxial Converter
High-Speed Instrumentation Amplifier
Data Acquisition
Medical Instrumentation
High-Speed Differential Line Receiver

Features

♦ 5000V/µs Slew Rate (MAX4444)
♦ +2V/V Internally Fixed Gain (MAX4444)
♦ External Gain Selection

(MAX4445, A

VCL

≥ +2V/V)

♦ 550MHz -3dB Bandwidth
♦ -60dB SFDR at 5MHz
♦ Low Differential Gain/Phase: 0.07%/0.05°
♦ Low Noise: 25nV/√Hz at f

IN

= 100kHz

♦ Low-Power Disable Mode Reduces Quiescent

Current to 3.5mA

MAX4444/MAX4445

________________________________________________________________

Maxim Integrated Products

1

Typical Operating Circuit

19-1543; Rev 0; 10/99

EVALUATION KIT AVAILABLE

Pin Configuration

Ordering Information

PART

MAX4444ESE
MAX4445ESE

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

16 Narrow SO
16 Narrow SO

SIGNAL

INPUT

IN+

MAX4444

IN-

GND

+5V

0.1µF

EN

V

CC

OUT

V

EE

REF

0.1µF

-5V

75Ω

75Ω

OUTPUT

TOP VIEW

N.C. (RG)
N.C. (RG)

( ) ARE FOR MAX4445 ONLY.

V

CC

V

CC

IN-

IN+
V

EE

V

EE

1
2
3

MAX4444

4

MAX4445

5
6
7
8

SO

16

GND

15

OUT

14

V

EE

13

V

EE

12

V

EE

V

11

EE

10

REF

9

EN

MAX4444/MAX4445

Ultra-High-Speed, Low-Distortion, Differential­to-Single-Ended Line Receivers with Enable

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(V

CC

= +5V, VEE= -5V, VEN= ≥2V, VCM= 0 , RL= ∞, REF = GND, A

VCL

= +2V/V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +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.

VCCto VEE...........................................................................+12V

Voltage on IN+, IN-, EN, OUT+,

OUT-, RG, REF..............................(VEE- 0.3V) to (VCC+ 0.3V)

Current Into IN+, IN-, RG, EN .............................................20mA

Output Short-Circuit Duration...........................Indefinite to GND

Continuous Power Dissipation (TA= +70°C)

16-Pin Narrow SO (derate 20mW/°C above +70°C)...1600mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

VEN= 0

Guaranteed by output swing test

VEN= 0, -3.5V ≤ V

OUT

≤ +3.5V, MAX4444

Guaranteed by CMRR test

-2.9V ≤ V

CM

≤ +2.9V

VS= ±4.5V to ±5.5V

RL= 30Ω

-3V ≤ V

OUT

≤ +3V

RL= 50Ω

RL= 100Ω

MAX4444

-2.9V ≤ V

IN

≤ +2.9V

RL= 100Ω

-3V ≤ V

OUT

≤ +3V,

R

L

= 100Ω

CONDITIONS

µA

2.2 10

I

IL

EN Logic Input Low Current

V

2

V

IH

EN Logic High Threshold

V

0.8

V

IL

EN Logic Low Threshold

kΩ

1.8

R

OUT(OFF)

Disable Output Resistance

dB

40 55

CMRRCommon-Mode Rejection Ratio

dB

53 70

PSRRPower-Supply Rejection Ratio

mA

90 120

I

OUT

Output Current Drive

MAX4445

±3.3 ±3.6

V

±3.4 ±3.7

V

OUT

Output Voltage Swing

%/°C

0.003

Gain-Error Drift

2.6 8

V

-1.7 1.7

V

DIFF

Differential Input Voltage Range

V

-2.9 2.9

V

CM

Input Common-Mode Voltage
Range

(1 + 600/RG)

2

A

V

Gain

170

kΩ

82

R

IN

Differential Input Resistance

mV

15 65

V

OS

Input Offset Voltage

µV/°C

12

TC

VOS

Input Offset-Voltage
Temperature Coefficient

µA

10 55

I

B

Input Bias Current

µA

0.25 45

I

OS

Input Offset Current

UNITSMIN TYP MAXSYMBOLPARAMETER

VIN= 0, VEN= 0

VIN= 0, VEN= 5V

VEN= 5V

3.5 5.5

mA

41 55

I

Q

Quiescent Current

µA

2.6 10

I

IH

EN Logic Input High Current

%

-2.9V ≤ V

CM

≤ +2.9V

V/V

Guaranteed by PSRR test

V

±4.5 ±5.5

Operating Supply Voltage
Range

0.5 2

Gain Error

MAX4445

MAX4444

V/µs

MAX4444/MAX4445

Ultra-High Speed, Low-Distortion, Differential-

to-Single-Ended Line Receivers with Enable

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= -5V, VEN= 5V, RL= 100Ω, REF = GND, A

VCL

= +2V/V, TA= +25°C, unless otherwise noted.)

V

OUT

= 2Vp-p

Settle to 0.1% , V

OUT

= 2V step

V

OUT

= 1V step

V

OUT

= 2Vp-p

V

OUT

= 100mVp-p

V

OUT

= 2V step

CONDITION

-35

-55

dBc

-65

SFDR

ns12Settling Time

650

MHzBW

LS

Large-Signal -3dB Bandwidth

MHz550BW

SS

Small-Signal -3dB Bandwidth

ps

1200

500

MHz800.1dB Gain Flatness

5000

2400

UNITSMIN TYP MAXSYMBOLPARAMETER

-60

t

RISE

Rise Time (Note 1)

f = 100kHz

f = 100kHz (Note 2)

NTSC, RL= 150Ω

pA/√Hz

1.8i

N

Input Noise Current Density

nV/√Hz

25e

N

Input Noise Voltage Density

degrees0.05DPDifferential Phase Error

NTSC, RL= 150Ω %0.07DGDifferential Gain Error

V

OUT

= 100mVp-p

fC= 100kHz

fC= 100MHz

fC= 20MHz

fC= 5MHz

V

OUT

= 2Vp-p

fC= 100MHz -35

fC= 100kHz

fC= 20MHz

fC= 5MHz

-50

dBc

-65

2nd-Harmonic Distortion

-62

V

OUT

= 2Vp-p

fC= 100MHz -55

fC= 100kHz

fC= 20MHz

fC= 5MHz

-62

dBc

-90

3rd-Harmonic Distortion

-72

V

OUT

= 4V step

V

OUT

= 0.5V step

V

OUT

= 1V step

V

OUT

= 2V step

700

700

700

ps

825

t

FALL

Fall Time (Note 1)

V/µsSRSlew Rate (Note 1)

V

OUT

= 0.5V step 600

MAX4444

V

OUT

= 4V step

MAX4445
MAX4444
MAX4445

3800

2000

VIN= 1V, V

OUT

settle to within 10%

VIN= 1V, V

OUT

settle to within 10%

ns200t

SHDN(OFF)

Disable Time

ns80t

SHDN(ON)

Enable Time

f = 10MHz Ω0.7Z

OUT

Output Impedance

VIN= 1V, V

OUT

settle to within 10%

VIN= 1V, V

OUT

settle to within 10%

µs0.3t

OFF

Power-Down Time

µs0.5t

ON

Power-Up Time

Note 1: Input step voltage has <100ps rise (fall) time. Measured at the output from 10% to 90% (90% to 10%) level.
Note 2: Includes the current noise contribution through the on-die feedback resistor.