This document introduces the LT1794 dual 500mA, 200MHz xDSL line driver amplifier, which meets all the requirements for full-rate, downstream ADSL line drivers. The device has a minimum output current of ±500mA, an output swing of ±11.1V, VS = ±12V, RL = 100Ω, an output swing of ±10.9V, VS = ±12V, IL = 250mA, low distortion: -82dBc@1MHz, 2VP-P input 50Ω, power-saving adjustable supply current, power-enhanced compact packaging: 20-Lead TSSOP and 20-Lead SW, 200MHz gain bandwidth, 500V/µS slew rate, specified at ±15V, ±12V and ±5V, high-density ADSL central office line drivers, high-efficiency ADSL, HDSL2, G.lite, SHDSL line drivers, buffers, test equipment amplifiers, cable drivers.
The LT1794 is a dual voltage‑feedback op‑amp that delivers a minimum 500 mA output current with low distortion and a high gain‑bandwidth product. It features adjustable supply current, short‑circuit protection, and thermal shutdown, and is offered in a 20‑lead TSSOP or 20‑lead SW package for high‑density designs.
Typical applications include high‑density ADSL central‑office line drivers, SHDSL, HDSL2, G.lite, buffers, test‑equipment amplifiers, and cable drivers. The device’s extended output swing and low‑power operation make it suitable for multi‑port DSL cards and other high‑speed communication systems.
| Gain Bandwidth | 200 MHz |
|---|---|
| Slew Rate | 500 V/µs |
| Operating Temperature Range | -40 °C to 85 °C |
| Typical Output Swing (12 V supply, 500 mA load) | +11.1 V |
| Typical Output Swing (12 V supply, 250 mA load) | +10.9 V |
| Package | 20‑lead TSSOP (wide 0.300) |
With a +12 V supply and a 250 mA load, the output swing is typically +10.9 V.
The device has a gain‑bandwidth product of 200 MHz.
The LT1794 is offered in a 20‑lead TSSOP and a 20‑lead SW surface‑mount package.