6500V/µs, Wideband, High-Output-Current, Single-Ended-to-Differential Line Drivers with Enable

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.

Applications

* 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

* 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%