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LT1794

Linear
Part Number LT1794
Manufacturer Linear
Description xDSL Line Driver Amplifier
Published Apr 4, 2016
Detailed Description U U FEATURES s Exceeds All Requirements For Full Rate, Downstream ADSL Line Drivers s ±500mA Minimum IOUT s ±11.1V Outp...
Datasheet PDF File LT1794 PDF File

LT1794
LT1794


Overview
U U FEATURES s Exceeds All Requirements For Full Rate, Downstream ADSL Line Drivers s ±500mA Minimum IOUT s ±11.
1V Output Swing, VS = ±12V, RL = 100Ω s ±10.
9V Output Swing, VS = ±12V, IL = 250mA s Low Distortion: – 82dBc at 1MHz, 2VP-P Into 50Ω s Power Saving Adjustable Supply Current s Power Enhanced Small Footprint Packages: 20-Lead TSSOP and 20-Lead SW s 200MHz Gain Bandwidth s 500V/µs Slew Rate s Specified at ±15V, ±12V and ±5V U APPLICATIO S s High Density ADSL Central Office Line Drivers s High Efficiency ADSL, HDSL2, G.
lite, SHDSL Line Drivers s Buffers s Test Equipment Amplifiers s Cable Drivers LT1794 Dual 500mA, 200MHz xDSL Line Driver Amplifier DESCRIPTIO 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 100Ω 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO High Efficiency ±12V Supply ADSL Central Office Line Driver 12V +IN 110Ω + 1/2 LT1794 – 1k RBIAS 24.
9k SHDN 12.
7Ω 1:2* • • 1000pF 110Ω 1k 100Ω – 1/2 LT1794 12.
7Ω *COILCRAFT X8390-A OR EQUIVALENT ISUPPLY = 10mA PER AMPLIFIER WITH RBIAS = 24.
9k...


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