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LT1794

Dual 500mA, 200MHz

xDSL Line Driver Amplifier

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Exceeds All Requirements For Full Rate,

Downstream ADSL Line Drivers

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Power Saving Adjustable Supply Current

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Power Enhanced Small Footprint Packages:

20-Lead TSSOP and 20-Lead SW

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200MHz Gain Bandwidth

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500V/

µs Slew Rate

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Specified at

±15V, ±12V and ±5V

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High Density ADSL Central Office Line Drivers

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High Efficiency ADSL, HDSL2, G.lite,

SHDSL Line Drivers

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Buffers

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Test Equipment Amplifiers

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Cable Drivers

The LT

amp with outstanding distortion performance. The ampli-

fiers 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 dissipa-

tion. The LT1794 features balanced, high impedance in-

puts with low input bias current and input offset voltage.

Active termination is easily implemented for further sys-

tem power reduction. Short-circuit protection and thermal

shutdown insure the device’s ruggedness.

The outputs drive a 100

Ω 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.

High Efficiency

±12V Supply ADSL Central Office Line Driver

1794 TA01

+

–

1/2

LT1794

–IN

–

+

1/2

LT1794

+IN

12V

SHDN

–12V

12.7

Ω

24.9k

1:2*

110

Ω

1000pF

110

Ω

1k

1k

12.7

Ω

SHDNREF

100

Ω

*COILCRAFT X8390-A OR EQUIVALENT

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO