LT1794 Dual 500mA, 200MHz xDSL Line Driver Amplifier

The LT™1794 is a 500mA minimum output current, 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 LT1794 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 LT1794, with its increased swing on lower supplies, can be used to upgrade LT1795 line driver applications.

The LT1794 is available in the very small, thermally enhanced, 20-lead TSSOP for maximum port density in line driver applications. The 20-lead SW is also available

产品特点 Features
  • 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 100 Ohms
  • Power Saving Adjustable Supply Current
  • Power Enhanced Small Footprint Packages: 20-Lead TSSOP and 20-Lead SW
  • 200MHz Gain Bandwidth
  • 500V/µs Slew Rate
  • Specified at ±15V, �12V and ±5V
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
LT1794 典型应用
LT1794 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) *
LT1794CFE TSSOP 20 C $6.50  $5.50 
LT1794CFE#PBF TSSOP 20 C $6.50  $5.50 
LT1794CFE#TR TSSOP 20 C $5.60 
LT1794CFE#TRPBF TSSOP 20 C $5.60 
LT1794CSW SO 20 C $5.85  $4.95 
LT1794CSW#PBF SO 20 C $5.85  $4.95 
LT1794CSW#TR SO 20 C $5.05 
LT1794CSW#TRPBF SO 20 C $5.05 
LT1794IFE TSSOP 20 I $7.15  $5.95 
LT1794IFE#PBF TSSOP 20 I $7.15  $5.95 
LT1794IFE#TR TSSOP 20 I $6.05 
LT1794IFE#TRPBF TSSOP 20 I $6.05 
LT1794ISW SO 20 I $6.95  $5.80 
LT1794ISW#PBF SO 20 I $6.95  $5.80 
LT1794ISW#TR SO 20 I $5.90 
LT1794ISW#TRPBF SO 20 I $5.90 
LT1794 数据手册及相关资料下载
  1. 数据手册(英文) : LT1794 - Dual 500mA, 200MHz xDSL Line Driver Amplifier.PDF
  2. 可靠性数据 : R412 Reliability Data .PDF
  3. LT Journal : May 2001 1MW Transimpedance Amplifier Achieves Near-Theoretical Noise Performance, 2.4GHz Gain Bandwidth, with Large-Area Photodiodes.PDF