LT1794 - Dual 500mA, 200MHz xDSL Line Driver Amplifier
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
Typical Application
Description
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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT1794CFE#PBF | TSSOP-20 | FE | C | 05-08-1663 (CA) | Yes |
| LT1794CFE#TRPBF | TSSOP-20 | FE | C | 05-08-1663 (CA) | Yes |
| LT1794CSW#PBF | SW-20 | SW | C | 05-08-1620 (SW20) | Yes |
| LT1794CSW#TRPBF | SW-20 | SW | C | 05-08-1620 (SW20) | Yes |
| LT1794IFE#PBF | TSSOP-20 | FE | I | 05-08-1663 (CA) | Yes |
| LT1794IFE#TRPBF | TSSOP-20 | FE | I | 05-08-1663 (CA) | Yes |
| LT1794ISW#PBF | SW-20 | SW | I | 05-08-1620 (SW20) | Yes |
| LT1794ISW#TRPBF | SW-20 | SW | I | 05-08-1620 (SW20) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1794CFE#PBF | TSSOP-20 | C | $6.50 | $5.50 | Yes | |
| LT1794CFE#TRPBF | TSSOP-20 | C | $5.60 | Yes | ||
| LT1794CSW#PBF | SW-20 | C | $5.85 | $4.95 | Yes | |
| LT1794CSW#TRPBF | SW-20 | C | $5.05 | Yes | ||
| LT1794IFE#PBF | TSSOP-20 | I | $7.15 | $5.95 | Yes | |
| LT1794IFE#TRPBF | TSSOP-20 | I | $6.05 | Yes | ||
| LT1794ISW#PBF | SW-20 | I | $6.95 | $5.80 | Yes | |
| LT1794ISW#TRPBF | SW-20 | I | $5.90 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- High Density ADSL Central Office Line Drivers
- High Efficiency ADSL, HDSL2, G.lite, SHDSL Line Drivers
- Buffers
- Test Equipment Amplifiers
- Cable Drivers
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LT1794
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
