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MAX4447, MAX4448, MAX4449
6500V/µs, Wideband, High-Output-Current, Single-Ended-to-Differential Line Drivers with Enable
Industry's Fastest Differential Line Drivers
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Status
Active: In Production.
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 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.
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Data Sheet
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An evaluation kit is available: MAX4447EVKIT, MAX4448EVKIT, MAX4449EVKIT
Key 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 per root-Hz at fIN = 1MHz
- 8ns Settling Time to 0.1%
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Applications/Uses
- Coaxial to Twisted-Pair Converter
- Differential ADC Driver
- Differential Line Driver
- Differential Pulse Amplifier
- High-Speed Differential Transmitter
- Single-Ended-to-Differential Conversion
- Video and RF Signal Processing and Transmission
- xDSL Applications
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Key Specifications:
| Video/Wideband Line Drivers/Receivers |
| Part Number |
Functions |
BW
(MHz) |
VSUPPLY
(V) |
ICC
(mA) |
IOUT
(mA) |
Slew Rate
(V/µs) |
Diff. Phase/ Gain
(deg/%) |
AV
(V/V) |
BW
(MHz) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Budgetary Price |
| @ -3dB |
typ |
min |
0.1dB min |
max w/pins |
See Notes |
| MAX4447 |
Driver |
430 |
|
46 |
90 |
5700 |
0.02/0.01 |
2 |
200 |
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62 |
-40 to +85 |
$2.28 @1k |
| MAX4448 |
330 |
4300 |
2 |
40 |
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$2.28 @1k |
| MAX4449 |
400 |
6500 |
5 |
140 |
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$2.28 @1k |
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See All Video/Wideband Line Drivers/Receivers (8)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-1519
Rev 1;
2000-12-01
This page last modified: 2007-06-04
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