LT1739 Dual 500mA, 200MHz xDSL Line Driver Amplifier

TheLT®1739 is a 500mA minimum outputcurrent,dual op amp with outstanding distortion performance. The amplifiers are gain-of-ten stable, but can be easily compensated for lower gains. The extended output swing allows for lower supply rails to reduce system power. Supply current is set with an external resistor to optimize power dissipation. The LT1739 features balanced, high impedance inputs with low input bias current and input offset voltage. Active termination is easily implemented for further system power reduction. Short-circuit protection and thermal shutdown insure the device’s ruggedness.

The outputs drive a 100 Ohms load to ±11.1V with ±12V supplies, and ±10.9V with a 250mA load. The LT1739 is a pin-for-pin replacement for the LT1794 in xDSL line driver applications and requires no circuit changes.

The LT1739 is available in the very small, thermally enhanced, 3mm x 4mm DFN package or a 20-lead TSSOP for maximum port density in central office line driver applications. For a dual version of the LT1739, see the LT6301 data sheet

产品特点 Features

3mm x 4mm High Power DFN Package
Exceeds All Requirements For Full Rate, Downstream ADSL Line Drivers
±500mA Minimum IOUT
±11.1V Output Swing, VS = ±12V, RL = 100 Ohms
±10.9V Output Swing, VS = ±12V, IL = 250mA
Low Distortion: –82dBc at 1MHz, 2VP-P Into 50 Ohms
Power Saving Adjustable Supply Current
Power Enhanced TSSOP-20 Small Footprint Package
200MHz Gain Bandwidth
600V/µs Slew Rate
Specified at ±12V and ±5V

封装

应用

High Density ADSL Central Office Line Drivers
High Efficiency ADSL, HDSL2, G.lite, SHDSL Line Drivers
Buffers
Test Equipment Amplifiers
Cable Drivers

典型应用图

参数

LT1739 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT1739CFE	TSSOP	20	C	$4.90	$3.55
LT1739CFE#PBF	TSSOP	20	C	$4.90	$3.55
LT1739CFE#TR	TSSOP	20	C		$3.61
LT1739CFE#TRPBF	TSSOP	20	C		$3.61
LT1739CUE#PBF	DFN	12	C	$5.00	$3.65
LT1739CUE#TR	DFN	12	C		$3.71
LT1739CUE#TRPBF	DFN	12	C		$3.71
LT1739IFE	TSSOP	20	I	$5.95	$4.30
LT1739IFE#PBF	TSSOP	20	I	$5.95	$4.30
LT1739IFE#TR	TSSOP	20	I		$4.36
LT1739IFE#TRPBF	TSSOP	20	I		$4.36
LT1739IUE#TR	DFN	12	I		$4.46
LT1739IUE#TRPBF	DFN	12	I		$4.46

LT1739 数据手册及相关资料下载

数据手册(英文) : LT1739 - Dual 500mA, 200MHz xDSL Line Driver Amplifier.PDF
可靠性数据 : R164 Reliability Data .PDF
LT Journal: Aug 1998 4.5ns Dual-Comparator-Based Crystal Oscillator has 50% Duty Cycle and Complementary Outputs.PDF.PDF