MAX4447 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 6500V/μs, Wideband, High-Output-Current, Single- Ended-to-Differential Line Drivers with Enable

19-1519 Rev 1; 10/99
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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.
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
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
MAX4447
MAX4448
MAX4449
SO
( ) ARE FOR MAX4448/MAX4449 ONLY
16 GND
15 OUT-
14 V_EE
13 V_EE
12 V_EE
11 V_EE
10 OUT+
9 EN
Features
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%
Ordering Information
PART
MAX4447ESE
MAX4448ESE
MAX4449ESE
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
0.1µF
75Ω
INPUT
75Ω
V_CC
IN
EN OUT+ ^RT
MAX4447
V_EE
OUT- _RT
GND
0.1µF
75Ω
75Ω
TO
LOAD
-5V
________________________________________________________________ Maxim Integrated Products 1
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