Maxim MAX4449ESE, MAX4448ESE, MAX4447ESE Datasheet
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General Description
The MAX4447/MAX4448/MAX4449 single-ended-todifferential 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 compensated 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 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.
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
IN
= 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
Typical Operating Circuit
19-1519 Rev 0; 8/99
PART
MAX4447ESE
MAX4448ESE
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE PIN-PACKAGE
16 Narrow SO
16 Narrow SO
Pin Configuration
Ordering Information
MAX4449ESE
-40°C to +85°C 16 Narrow SO
+5V
TOP VIEW
1
V
CC
2
V
CC
N.C.
3
MAX4447
4
N.C. (RG)
IN
N.C.
V
EE
V
EE
( ) ARE FOR MAX4448/MAX4449 ONLY
MAX4448
5
MAX4449
6
7
8
SO
16
GND
15
OUT-
14
V
EE
13
V
EE
12
V
EE
V
11
EE
10
OUT+
9
EN
INPUT
75Ω
0.1µF
75Ω
V
CC
IN
MAX4447
GND
0.1µF
75Ω
R
T
OUT+
EN
OUT-
V
EE
-5V
R
T
75Ω
TO
LOAD
MAX4447/MAX4448/MAX4449
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC= +5V, VEE= -5V, VEN≥ 2V, V
OUT
= V
OUT+
- V
OUT-
, RL= ∞, 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, EN, OUT+, OUT-, RG ....(V
EE
- 0.3V) to (VCC+ 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, 10sec) .............................+300°C
VIN= 0, VEN≤ V
IL
VEN= 5V
Guaranteed by gain-error test
VEN= 0
V
EE
guaranteed by PSRR test
V
CC
guaranteed by PSRR test
VEN= 0, V
OUT+
= V
OUT-
= 3.15V or -3.15V
VS= ±4.5V to ±5.5V
Short circuit to GND
RL= 20Ω between OUT+ and OUT-
RL= 50Ω between OUT+ and OUT-
-3.0V ≤ VIN≤ 3.0V
VIN= 0
VIN= 0
RL= 100Ω between OUT+ and OUT-
VIN= 0
CONDITIONS
3.2 5.5
I
Q
Quiescent Current mA
46 55
µA0.8 10I
IH
EN Logic Input High Current
µA-2.5 10I
IL
EN Logic Input Low Current
V2V
IH
EN Logic High Threshold
V0.8V
IL
EN Logic Low Threshold
µA430I
OUT(OFF)
Output Leakage Current
dB53 75PSRRPower-Supply Rejection Ratio
mA140I
SC
Output Short-Circuit Current
mA90 130I
OUT
Output Current Drive
V
±5.2 ±6.2
V
OUT
Output Voltage Swing
±6.3 ±7.4
V-6/A
V
+6/A
V
V
IN
Input Voltage Range
V
-5.5 -4.5V
EE
4.5 5.5V
CC
Operating Supply Voltage
Range
2
kΩ50R
IN
Input Resistance
mV1.3 50V
OS
Input Offset Voltage
µV/°C25TC
VOS
Input Offset Voltage
Temperature Coefficient
µA745I
B
Input Bias Current
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX4447
-6V ≤ V
OUT
≤ 6VA
V
MAX4448/MAX4449
(Note 1)
Gain V/V
2 · (1+300/R
G
)
VIN= 0, VEN≥ V
IH
-6V ≤ V
OUT
≤ 6V %
0.1 2
Gain Error
V
OUT
= 0 %/°C
-0.002
Gain Drift
MAX4447
MAX4447
MAX4448/MAX4449
MAX4448/MAX4449
-0.3 5
0.01
Large-Signal -3dB Bandwidth
MAX4447/MAX4448/MAX4449
6500V/µs, Wideband, High-Output-Current, Single-
Ended-to-Differential Line Drivers with Enable
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(VCC= +5V, VEE= -5V, RL= 100Ω between OUT+ and OUT-, A
VCL
= +2V/V for MAX4447/MAX4448, A
VCL
= +5V/V for MAX4449,
V
OUT
= V
OUT
+ - V
OUT
-, TA= +25°C, unless otherwise noted.)
V
OUT
= 100mVp-p
CONDITIONS
MHz
400
BW
SS
Small-Signal -3dB Bandwidth
330
430
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX4447
MAX4448
MAX4449
250MAX4449
V
OUT
= 2Vp-p
MHz
405
V
OUT
= 4Vp-p
310
285MAX4447
MAX4448
MAX4449
320
260
250MAX4447
MAX4448
MAX4449
V
OUT
= 8V step
6500
V
OUT
= 100mVp-p
SRSlew Rate (Note 2)
4300
5700MAX4447
MAX4448
MAX4449
V
OUT
= 2V step
V/µs
1800
V
OUT
= 4V step
1900
1700MAX4447
MAX4448
MAX4449
3700
3000
3000MAX4447
MAX4448
MAX4449
MHz
140
0.1dB Gain Flatness
40
200MAX4447
MAX4448
MAX4449
V
OUT
= 8V step
850
t
RISE
Rise Time (Note 2)
1030
670MAX4447
MAX4448
MAX4449
V
OUT
= 2V step
ps
740
V
OUT
= 4V step
520
720MAX4447
MAX4448
MAX4449
660
820
720MAX4447
MAX4448
MAX4449
V
OUT
= 8Vp-p
BW
LS
Large-Signal -3dB Bandwidth
MAX4447/MAX4448/MAX4449
6500V/µs, Wideband, High-Output-Current, SingleEnded-to-Differential Line Drivers with Enable
4 _______________________________________________________________________________________
Note 1: RGis 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.
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC= +5V, VEE= -5V, RL= 100Ω between OUT+ and OUT-, A
VCL
= +2V/V for MAX4447/MAX4448, A
VCL
= +5V/V for MAX4449,
V
OUT
= V
OUT
+ - V
OUT
-, TA= +25°C, unless otherwise noted.)
µs
nV/√Hz
pA/√Hz
V
OUT
= 4V step
780
V
OUT
= 8V step
810
900MAX4447
MAX4448
MAX4449
V
OUT
= 2V step
660
CONDITIONS
t
FALL
Fall Time (Note 2)
770
800MAX4447
MAX4448
MAX4449
-78
8
fC= 5MHz
ps
900
900
1100
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX4447
MAX4448
MAX4449
dBc
Settling Time
-46
-62fC= 20MHz
fC= 100MHz
NTSC, RL= 150Ω
NTSC, RL= 150Ω
0.01DGDifferential Gain Error
0.02DP
-46
2nd Harmonic Distortion
Differential Phase Error
fC= 100MHz
-62
-78
-78fC= 100kHz
fC= 5MHz
fC= 20MHz
VIN= 1V, V
OUT
settle to within 1%
VIN= 1V, V
OUT
settle to within 1%
VIN= 1V, V
OUT
settle to within 1%
0.08t
ON
Power-Up Time
µs0.4
ns55Enable Time
Disable Time
VIN= 1V, V
OUT
settle to within 1%
f = 10MHz, each output to ground
f = 1MHz
f = 1MHz (Note 3)
Ω1.0Z
OUT±
Output Impedance
%
1.8i
N
24e
N
Input Noise Voltage Density
Input Noise Current Density
µs
0.5t
OFF
Power-Down Time
V
OUT
= 2Vp-p
-54
3rd Harmonic Distortion
fC= 100MHz
-71
-86
-86fC= 100kHz
fC= 5MHz
fC= 20MHz
ns
-78fC= 100kHz
V
OUT
= 2Vp-pSFDRSpurious-Free Dynamic Range dBc
degrees
V
OUT
= 2Vp-p dBc
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