Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Amplifier - Video buffering Differential 400 MHz SOIC 16

General Description

The MAX4447/MAX4448/MAX4449 single-ended-to-

differential line drivers are designed for high-speed

communications. Using current feedback for greater

bandwidth, these devices deliver full-power bandwidths

up to 405MHz and feature slew rates as high as

6500V/µs. The MAX4447 has a fixed gain of +2V/V and

a small-signal bandwidth of 430MHz. The MAX4448/

MAX4449 have small-signal bandwidths of 330MHz

and 400MHz, respectively, and are internally compen-

sated for minimum gain configurations of +2V/V and

+5V/V, respectively. For greater design flexibility, the

MAX4448/MAX4449 allow for variable gain selection

using external gain-setting resistors. A low-power

enable mode reduces current consumption below 5.5mA

and places the outputs in a high-impedance state.

The MAX4447/MAX4448/MAX4449 can deliver differen-

tial output swings of ±6.2V from ±5V supplies with a

50Ω load. Excellent differential gain/phase and noise

specifications make these amplifiers ideal for a wide

variety of video and RF signal-processing and transmis-

sion applications.

Applications

Differential Line Driver

Single-Ended-to-Differential Conversion

High-Speed Differential Transmitter

Coaxial to Twisted-Pair Converter

Differential Pulse Amplifier

Differential ADC Driver

xDSL Applications

Video and RF Signal Processing and Transmission

Features

♦ 6500V/µs Slew Rate (MAX4449)

♦ Small-Signal Bandwidth

430MHz (MAX4447)

330MHz (MAX4448)

400MHz (MAX4449)

♦ 200MHz 0.1dB Gain Flatness (MAX4447)

♦ 130mA Output Drive Current

♦ +2V/V Internally Fixed Gain (MAX4447)

♦ External Gain Selection

≥+2V/V (MAX4448)

≥+5V/V (MAX4449)

♦ -78dB SFDR at 100kHz

♦ Low Differential Gain/Phase: 0.01%/0.02°

♦ Ultra-Low Noise: 23nV/√Hz at f

= 1MHz

♦ 8ns Settling Time to 0.1%

MAX4447/MAX4448/MAX4449

6500V/µs, Wideband, High-Output-Current, Single-

Ended-to-Differential Line Drivers with Enable

________________________________________________________________ Maxim Integrated Products 1

0.1µF

+5V

MAX4447

75Ω

LOAD

75Ω

OUT+

OUT-

GND

-5V

75Ω

INPUT

75Ω

GND

OUT-

OUT+

TOP VIEW

MAX4447

MAX4448

MAX4449

N.C.

N.C. (RG)

( ) ARE FOR MAX4448/MAX4449 ONLY

Typical Operating Circuit

19-1519 Rev 1; 10/99

PART

MAX4447ESE

MAX4448ESE

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

16 Narrow SO

Pin Configuration

Ordering Information

MAX4449ESE

-40°C to +85°C 16 Narrow SO

EVALUATION KIT

AVAILABLE

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Summary of content (12 pages)

PAGE 1
9-1519 Rev 1; 10/99 TION KIT EVALUA ABLE IL A AV 6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable The MAX4447/MAX4448/MAX4449 can deliver differential output swings of ±6.2V from ±5V supplies with a 50Ω load. Excellent differential gain/phase and noise specifications make these amplifiers ideal for a wide variety of video and RF signal-processing and transmission applications.
PAGE 2
MAX4447/MAX4448/MAX4449 6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable ABSOLUTE MAXIMUM RATINGS VCC to VEE ..........................................................................+12V Voltage on IN, EN, OUT+, OUT-, RG ....(VEE - 0.3V) to (VCC + 0.3V) Output Short-Circuit Duration to GND ...........................Indefinite Continuous Power Dissipation (TA = +70°C) 16-Pin Narrow SO (derate 20mW/°C above +70°C) ..1600mW Operating Temperature Range ..........
PAGE 3
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable (VCC = +5V, VEE = -5V, RL = 100Ω between OUT+ and OUT-, AVCL = +2V/V for MAX4447/MAX4448, AVCL = +5V/V for MAX4449, VOUT = VOUT+ - VOUT-, TA = +25°C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BWSS CONDITIONS VOUT = 100mVp-p VOUT = 8Vp-p VOUT = 4Vp-p Large-Signal -3dB Bandwidth Large-Signal -3dB Bandwidth BWLS VOUT = 2Vp-p 0.
PAGE 4
MAX4447/MAX4448/MAX4449 6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable AC ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V, VEE = -5V, RL = 100Ω between OUT+ and OUT-, AVCL = +2V/V for MAX4447/MAX4448, AVCL = +5V/V for MAX4449, VOUT = VOUT+ - VOUT-, TA = +25°C, unless otherwise noted.
PAGE 5
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable MAX4448 SMALL-SIGNAL GAIN vs. FREQUENCY (VOUT = 100mVp-p) 2 1 0 0 -1 -2 3 2 1 GAIN (dB) 1 -1 -2 0 -1 -2 -3 -3 -3 -4 -4 -4 -5 -5 -5 -6 -6 -6 1M 10M 100M 1G 100k 1M 10M 100M 1G 100k 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) MAX4447 GAIN FLATNESS vs. FREQUENCY (VOUT = 100mVp-p) MAX4448 GAIN FLATNESS vs. FREQUENCY (VOUT = 100mVp-p) MAX4449 GAIN FLATNESS vs.
PAGE 6
Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, VEN = +5V, VOUT = VOUT+ - VOUT-, RL = 100Ω between OUT+ and OUT-, AV = +2V/V for MAX4447/MAX4448, AV = +5V/V for MAX4449, TA = +25°C, unless otherwise noted.) MAX4448 SMALL-SIGNAL GAIN vs.
PAGE 7
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable MAX4447 DIFFERENTIAL GAIN AND PHASE MAX4447 0.000 -0.002 -0.004 MAX4448 4000 0 100 0 2 4 6 8 10 0.03 0.02 0.01 0 -0.01 0 12 0 10 20 30 40 50 60 70 80 90 100 IRE IRE MAX4449 DIFFERENTIAL GAIN AND PHASE MAX4447 HARMONIC DISTORTION vs. FREQUENCY (VOUT = 2Vp-p) MAX4448 HARMONIC DISTORTION vs. FREQUENCY (VOUT = 2Vp-p) -10 0.015 0.010 0.005 0.000 -0.
PAGE 8
Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, VEN = +5V, VOUT = VOUT+ - VOUT-, RL = 100Ω between OUT+ and OUT-, AV = +2V/V for MAX4447/MAX4448, AV = +5V/V for MAX4449, TA = +25°C, unless otherwise noted.) MAX4449 HARMONIC DISTORTION vs. OUTPUT VOLTAGE SWING (fC = 5MHz) -40 -50 2ND 3RD -70 -80 -90 -100 2 3 4 5 6 7 1 10 100 1k 10k 100k 10 100 1k 10k 100k 1M FREQUENCY (Hz) ISOLATION RESISTANCE vs. CAPACITIVE LOAD OUTPUT IMPEDANCE vs.
PAGE 9
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable QUIESCENT CURRENT vs. TEMPERATURE 30 20 10 MAX4447 TOC38 40 12 INPUT BIAS CURRENT (µA) QUIESCENT CURRENT (mA) EN = VCC MAX4447 TOC37 50 INPUT BIAS CURRENT vs. TEMPERATURE 9 6 3 EN = GND 0 -40 -15 10 35 60 0 85 -40 TEMPERATURE (°C) -15 10 35 60 85 TEMPERATURE (°C) Pin Description PIN MAX4448 MAX4449 NAME MAX4447 FUNCTION 1, 2 1, 2 VCC Positive Power Supply. Bypass with a 0.
PAGE 10
MAX4447/MAX4448/MAX4449 6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable Detailed Description The MAX4447/MAX4448/MAX4449 single-ended-to-differential converters are capable of transmitting highspeed signals such as T1 or xDSL over twisted-pair cable. Excellent gain and phase characteristics, along with low distortion, make these devices suitable for video and RF signal processing and transmission.
PAGE 11
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable IN 500mV/div CL = 15pF OUT 1V/div CL = 15pF OUT 1V/div Figure 3. Capacitive-Loaded Output Step Response Without Isolation Resistor Figure 4. Capacitive-Loaded Output Step Response with 14Ω Isolation Resistor Setting Gain Twisted-Pair Line Driver The MAX4448/MAX4449 are stable with minimum gain of +2V/V and +5V/V, respectively.
PAGE 12
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable SOICN.EPS MAX4447/MAX4448/MAX4449 Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.