LINEAR TECHNOLOGY LT1794 Data Sheet Manual
Summary
This dual xDSL Line Driver Amplifier is an advanced component designed for high-density telecommunications applications, supporting ADSL, HDSL2, and G.lite architectures. It provides reliable 500mA output with outstanding low distortion performance, uniquely featuring extended output swing capability even when powered by lower supply rails—a key benefit for modern systems. This guide details the comprehensive electrical characteristics, absolute maximum ratings, and typical application circuits needed to successfully integrate this high-performance line driver into your central office equipment or cable plant technology.
Page 1 Text Content
LT1794
Dual 500m A, 200MHz x DSL Line Driver Amplifier
FEATURES DESCRIPTIO Exceeds All Requirements For Full Rate, The LT®1794 is a 500m A minimum output current, dual op Downstream ADSL Line Drivers amp with outstanding distortion performance. The ampli- ±500m A Minimum IOUT fiers are gain-of-ten stable, but can be easily compensated ±11.1V Output Swing, VS = ±12V, RL = 100Ω for lower gains. The extended output swing allows for ±10.9V Output Swing, VS = ±12V, IL = 250m A lower supply rails to reduce system power. Supply current Low Distortion: – 82d Bc at 1MHz, 2VP-P Into 50Ω is set with an external resistor to optimize power dissipa- Power Saving Adjustable Supply Current tion. The LT1794 features balanced, high impedance in- Power Enhanced Small Footprint Packages: puts with low input bias current and input offset voltage. 20-Lead TSSOP and 20-Lead SW Active termination is easily implemented for further sys- 200MHz Gain Bandwidth tem power reduction. Short-circuit protection and thermal 500V/µs Slew Rate shutdown insure the device’s ruggedness. Specified at ±15V, ±12V and ±5V
The outputs drive a 100Ω load to ±11.1V with ±12V supplies, and ±10.9V with a 250m A load. The LT1794,
APPLICATIO S
with its increased swing on lower supplies, can be used to High Density ADSL Central Office Line Drivers upgrade LT1795 line driver applications.
High Efficiency ADSL, HDSL2, G.lite,
The LT1794 is available in the very small, thermally
SHDSL Line Drivers
enhanced, 20-lead TSSOP for maximum port density in
Buffers
line driver applications. The 20-lead SW is also available.
Test Equipment Amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation.
Cable Drivers
TYPICAL APPLICATIO
High Efficiency ±12V Supply ADSL Central Office Line Driver
RBIAS 24.9k
SHDN 12.7Ω
1/2 LT1794
*COILCRAFT X8390-A OR EQUIVALENT ISUPPLY = 10m A PER AMPLIFIER
1/2 WITH RBIAS = 24.9k LT1794
SHDNREF
1794 TA01
Page Summary Contents For LINEAR TECHNOLOGY LT1794 Data Sheet Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 20 |
| File Size | 275.52 KB |
| Published | May 25, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the minimum output current and maximum gain bandwidth?
The device features a 500mA minimum output current and offers a 200MHz gain bandwidth.
How can I improve power efficiency while maintaining output capabilities?
The LT1794 supports adjustable supply current and includes an extended output swing, allowing operation on lower supply rails to reduce system power.
What is the maximum operating temperature range for this line driver amplifier?
Its specified temperature range is –40°C to 85°C, with a junction temperature limit of 150°C.
Does the device offer features to ensure reliable use in commercial settings?
Yes, it includes short-circuit protection and thermal shutdown, ensuring the device's ruggedness for applications like ADSL Central Office Line Drivers.