19-1519 Rev 1; 10/99
TION KIT
EVALUA
LE
AVAILAB
6500V/µs, Wideband, High-Output-Current, Single-
Ended-to-Differential Line Drivers with Enable
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.
o
6500V/µs Slew Rate (MAX4449)
o
Small-Signal Bandwidth
430MHz (MAX4447)
330MHz (MAX4448)
400MHz (MAX4449)
o
200MHz 0.1dB Gain Flatness (MAX4447)
o
130mA Output Drive Current
o
+2V/V Internally Fixed Gain (MAX4447)
o
External Gain Selection
≥
+2V/V (MAX4448)
≥
+5V/V (MAX4449)
o
-78dB SFDR at 100kHz
o
Low Differential Gain/Phase: 0.01%/0.02°
o
Ultra-Low Noise: 23nV/√Hz at f
IN
= 1MHz
o
8ns Settling Time to 0.1%
Features
MAX4447/MAX4448/MAX4449
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
PART
MAX4447ESE
MAX4448ESE
MAX4449ESE
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 Narrow SO
16 Narrow SO
16 Narrow SO
Typical Operating Circuit
+5V
Pin Configuration
TOP VIEW
V
CC
1
V
CC
2
N.C. 3
N.C. (RG) 4
IN 5
N.C. 6
V
EE
7
V
EE
8
16 GND
15 OUT-
14 V
EE
0.1µF
75Ω
75Ω
INPUT
75Ω
V
CC
IN
EN
OUT+ R
T
TO
LOAD
OUT-
R
T
75Ω
MAX4447
MAX4448
MAX4449
13 V
EE
12 V
EE
11 V
EE
10 OUT+
9
EN
MAX4447
V
EE
GND
0.1µF
SO
( ) ARE FOR MAX4448/MAX4449 ONLY
-5V
________________________________________________________________
Maxim Integrated Products
1
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.
6500V/µs, Wideband, High-Output-Current, Single-
Ended-to-Differential Line Drivers with Enable
MAX4447/MAX4448/MAX4449
ABSOLUTE MAXIMUM RATINGS
V
CC
to V
EE
..........................................................................+12V
Voltage on IN, EN, OUT+, OUT-, RG ....(V
EE
- 0.3V) to (V
CC
+ 0.3V)
Output Short-Circuit Duration to GND ...........................Indefinite
Continuous Power Dissipation (T
A
= +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, 10s) .................................+300°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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, V
EE
= -5V, V
EN
≥
2V, V
OUT
= V
OUT+
- V
OUT-
, R
L
=
∞,
T
A
= T
MIN
to T
MAX,
unless otherwise noted. Typical values are at
T
A
= +25°C.)
PARAMETER
Operating Supply Voltage
Range
Input Voltage Range
Input Offset Voltage
Input Offset Voltage
Temperature Coefficient
Input Bias Current
Input Resistance
Gain
SYMBOL
V
CC
V
EE
V
IN
V
OS
TC
VOS
I
B
R
IN
A
V
CONDITIONS
V
CC
guaranteed by PSRR test
V
EE
guaranteed by PSRR test
Guaranteed by gain-error test
V
IN
= 0
V
IN
= 0
V
IN
= 0
-3.0V
≤
V
IN
≤
3.0V
MAX4447
-6V
≤
V
OUT
≤
6V
MAX4448/MAX4449
(Note 1)
MIN
4.5
-5.5
-6/A
V
1.3
25
7
50
2
2
×
(1+300/R
G
)
0.1
-0.3
-0.002
0.01
±7.4
±6.2
130
140
75
4
2
5
V/V
45
TYP
MAX
5.5
-4.5
+6/A
V
50
UNITS
V
V
mV
µV/°C
µA
kΩ
Gain Error
Gain Drift
Output Voltage Swing
Output Current Drive
Output Short-Circuit Current
Power-Supply Rejection Ratio
Output Leakage Current
EN Logic Low Threshold
EN Logic High Threshold
EN Logic Input Low Current
EN Logic Input High Current
Quiescent Current
V
OUT
I
OUT
I
SC
PSRR
I
OUT(OFF)
V
IL
V
IH
I
IL
I
IH
I
Q
MAX4447
MAX4448/MAX4449
MAX4447
V
OUT
= 0
MAX4448/MAX4449
R
L
= 100Ω between OUT+ and OUT-
R
L
= 50Ω between OUT+ and OUT-
R
L
= 20Ω between OUT+ and OUT-
Short circuit to GND
V
S
= ±4.5V to ±5.5V
V
EN
= 0, V
OUT+
= V
OUT-
= 3.15V or -3.15V
-6V
≤
V
OUT
≤
6V
%
%/°C
V
mA
mA
dB
µA
V
V
µA
µA
mA
±6.3
±5.2
90
53
30
0.8
10
10
55
5.5
2
V
EN
= 0
V
EN
= 5V
V
IN
= 0, V
EN
≥
V
IH
V
IN
= 0, V
EN
≤
V
IL
-2.5
0.8
46
3.2
2
_______________________________________________________________________________________
6500V/µs, Wideband, High-Output-Current, Single-
Ended-to-Differential Line Drivers with Enable
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, V
EE
= -5V, R
L
= 100Ω between OUT+ and OUT-, A
VCL
= +2V/V for MAX4447/MAX4448, A
VCL
= +5V/V for MAX4449,
V
OUT
= V
OUT
+ - V
OUT
-, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BW
SS
CONDITIONS
MAX4447
V
OUT
= 100mVp-p
V
OUT
= 8Vp-p
V
OUT
= 4Vp-p
Large-Signal -3dB Bandwidth
Large-Signal -3dB Bandwidth
BW
LS
V
OUT
= 2Vp-p
MAX4448
MAX4449
MAX4449
MAX4447
MAX4448
MAX4449
MAX4447
MAX4448
MAX4449
MAX4447
0.1dB Gain Flatness
V
OUT
= 100mVp-p
MAX4448
MAX4449
MAX4447
V
OUT
= 8V step
MAX4448
MAX4449
MAX4447
Slew Rate (Note 2)
SR
V
OUT
= 4V step
MAX4448
MAX4449
MAX4447
V
OUT
= 2V step
MAX4448
MAX4449
MAX4447
V
OUT
= 8V step
MAX4448
MAX4449
MAX4447
Rise Time (Note 2)
t
RISE
V
OUT
= 4V step
MAX4448
MAX4449
MAX4447
V
OUT
= 2V step
MAX4448
MAX4449
MIN
TYP
430
330
400
250
250
260
320
285
310
405
200
40
140
5700
4300
6500
3000
3000
3700
1700
1900
1800
670
1030
850
720
820
660
720
520
740
ps
V/µs
MHz
MHz
MHz
MAX
UNITS
MAX4447/MAX4448/MAX4449
_______________________________________________________________________________________
3
6500V/µs, Wideband, High-Output-Current, Single-
Ended-to-Differential Line Drivers with Enable
MAX4447/MAX4448/MAX4449
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, V
EE
= -5V, R
L
= 100Ω between OUT+ and OUT-, A
VCL
= +2V/V for MAX4447/MAX4448, A
VCL
= +5V/V for MAX4449,
V
OUT
= V
OUT
+ - V
OUT
-, T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
V
OUT
= 8V step
CONDITIONS
MAX4447
MAX4448
MAX4449
MAX4447
Fall Time (Note 2)
t
FALL
V
OUT
= 4V step
MAX4448
MAX4449
MAX4447
V
OUT
= 2V step
Settling Time
MAX4448
MAX4449
Settle to 0.1%, V
OUT
= 2V step
f
C
= 100kHz
Spurious-Free Dynamic Range
SFDR
V
OUT
= 2Vp-p
f
C
= 5MHz
f
C
= 20MHz
f
C
= 100MHz
f
C
= 100kHz
2nd Harmonic Distortion
V
OUT
= 2Vp-p
f
C
= 5MHz
f
C
= 20MHz
f
C
= 100MHz
f
C
= 100kHz
3rd Harmonic Distortion
V
OUT
= 2Vp-p
f
C
= 5MHz
f
C
= 20MHz
f
C
= 100MHz
Differential Phase Error
Differential Gain Error
Input Noise Voltage Density
Input Noise Current Density
Output Impedance
Enable Time
Disable Time
Power-Up Time
Power-Down Time
t
ON
t
OFF
DP
DG
e
N
i
N
Z
OUT±
NTSC, R
L
= 150Ω
NTSC, R
L
= 150Ω
f = 1MHz (Note 3)
f = 1MHz
f = 10MHz, each output to ground
V
IN
= 1V, V
OUT
settle to within 1%
V
IN
= 1V, V
OUT
settle to within 1%
V
IN
= 1V, V
OUT
settle to within 1%
V
IN
= 1V, V
OUT
settle to within 1%
MIN
TYP
1100
900
900
900
810
780
800
770
660
8
-78
-78
-62
-46
-78
-78
-62
-46
-86
-86
-71
-54
0.02
0.01
24
1.8
1.0
55
0.4
0.08
0.5
degrees
%
nV/√Hz
pA/√Hz
Ω
ns
µs
µs
µs
dBc
dBc
dBc
ns
ps
MAX
UNITS
Note 1:
R
G
is the gain resistor. See Figure 1.
Note 2:
Input step voltage has <100ps rise (fall) time. Measured at the output from 10% to 90% (90% to 10%) levels.
Note 3:
Includes the current noise contribution through the on-die feedback resistor.
4
_______________________________________________________________________________________
6500V/µs, Wideband, High-Output-Current, Single-
Ended-to-Differential Line Drivers with Enable
Typical Operating Characteristics
(V
CC
= +5V, V
EE
= -5V, V
EN
= +5V, V
OUT
= V
OUT+
- V
OUT-
, R
L
= 100Ω between OUT+ and OUT-, A
V
= +2V/V for MAX4447/MAX4448,
A
V
= +5V/V for MAX4449, T
A
= +25°C, unless otherwise noted.)
MAX4447
SMALL-SIGNAL GAIN vs. FREQUENCY
(V
OUT
= 100mVp-p)
MAX4447 TOC01
MAX4447/MAX4448/MAX4449
MAX4448
SMALL-SIGNAL GAIN vs. FREQUENCY
(V
OUT
= 100mVp-p)
MAX4447 TOC02
MAX4449
SMALL-SIGNAL GAIN vs. FREQUENCY
(V
OUT
= 100mVp-p)
3
2
1
GAIN (dB)
0
-1
-2
-3
-4
-5
-6
MAX4447 TOC03
4
3
2
1
GAIN (dB)
4
3
2
1
GAIN (dB)
0
-1
-2
-3
-4
-5
-6
4
0
-1
-2
-3
-4
-5
-6
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
MAX4447
GAIN FLATNESS vs. FREQUENCY
(V
OUT
= 100mVp-p)
MAX4447 TOC04
MAX4448
GAIN FLATNESS vs. FREQUENCY
(V
OUT
= 100mVp-p)
MAX4447 TOC05
MAX4449
GAIN FLATNESS vs. FREQUENCY
(V
OUT
= 100mVp-p)
0.4
0.3
0.2
GAIN (dB)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
MAX4447 TOC06
0.5
0.4
0.3
0.2
GAIN (dB)
0.5
0.4
0.3
0.2
GAIN (dB)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0.5
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
MAX4447
LARGE-SIGNAL GAIN vs. FREQUENCY
(V
OUT
= 2Vp-p)
MAX4447 TOC07
MAX4448
LARGE-SIGNAL GAIN vs. FREQUENCY
(V
OUT
= 2Vp-p)
MAX4447 TOC08
MAX4449
LARGE-SIGNAL GAIN vs. FREQUENCY
(V
OUT
= 2Vp-p)
3
2
1
GAIN (dB)
0
-1
-2
-3
-4
-5
-6
MAX4447 TOC09
4
3
2
1
GAIN (dB)
4
3
2
1
GAIN (dB)
0
-1
-2
-3
-4
-5
-6
4
0
-1
-2
-3
-4
-5
-6
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
_______________________________________________________________________________________
5
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