MAX4448：6500V/µs, Wideband, High-Output-Current, Single-Ended-to-Differential Line Drivers with Enable

Industry's Fastest Differential Line Drivers

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.

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%

MAX4447, MAX4448, MAX4449: Typical Operating Circuit

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

DataSheet

title	Download file
MAX4447-MAX4449 Data Sheet	MAX4447-MAX4449.pdf

Parametrics

Part Number	Functions	BW (MHz)	V_SUPPLY (V)	I_CC (mA)	I_OUT (mA)	Slew Rate (V/µs)	Diff. Phase/ Gain (deg/%)	A_V (V/V)	BW (MHz)	Package/Pins	Oper. Temp. (°C)	Budgetary Price
Part Number	Functions	@ -3dB	V_SUPPLY (V)	typ	min	Slew Rate (V/µs)	Diff. Phase/ Gain (deg/%)	A_V (V/V)	0.1dB min	Package/Pins	Oper. Temp. (°C)	See Notes
MAX4447	Driver	430	-5 5	46	90	5700	0.02/0.01	2	200	SOIC(N)/16	-40 to +85	$2.94 @1k
MAX4448		330				4300		2	40	SOIC(N)/16		$2.94 @1k
MAX4449		400				6500		5	140	SOIC(N)/16		$2.88 @1k

Design kits & evaluation modules

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4448ESE	No Longer Available	MAX4448ESE+	SOIC(N),;16 pin;62 mm²	-40°C to +85°C	No
MAX4448ESE+	Active		SOIC(N),;16 pin;62 mm²	-40°C to +85°C	Lead Free
MAX4448ESE+T	Active		SOIC(N),;16 pin;62 mm²	-40°C to +85°C	Lead Free
MAX4448ESE-T	No Longer Available	MAX4448ESE+T	N.SO;16 pin	-40°C to +85°C	See data sheet

MAX4447-MAX4449.pdf MAX4449