LT1399 - Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown


  • 300MHz Bandwidth on ±5V (Av= 1, 2 and -1)
  • 0.1dB Gain Flatness: 150MHz (Av = 1, 2 and -1)
  • Completely Off in Shutdown, 0µA Supply Current
  • High Slew Rate: 800V/µs
  • Wide Supply Range:
    ±2V(4V) to ±6V(12V)(LT1398/LT1399)
    ±2V (4V) to ±7.5V (15V) (LT1399HV)
  • 80mA Output Current
  • Low Supply Current: 4.6mA/Amplifier
  • Fast Turn-On Time: 30ns
  • Fast Turn-Off Time: 40ns
  • 16-Pin Narrow SO/Narrow SSOP Packages

Typical Application

LT1399 Typical Application
LT1399 Typical Application


The LT1399 and LT1399HV contain three independent 300MHz current feedback amplifiers, each with a shutdown pin. The LT1399HV is a higher voltage version of the LT1399. The LT1398 is a two amplifier version of the LT1399.

The LT1398/LT1399 operate on all supplies from a single 4V to ±6V. The LT1399HV operates on all supplies from 4V to ±7.5V.

Each amplifier draws 4.6mA when active. When disabled each amplifier draws zero supply current and its output becomes high impedance. The amplifiers turn on in only 30ns and turn off in 40ns, making them ideal in spread spectrum and portable equipment applications.

The LT1398/LT1399/LT1399HV are manufactured on Linear Technology’s proprietary complementary bipolar process. The LT1399/LT1399HV are pin-for-pin upgrades to the LT1260 optimized for use on ±5V/±7.5V supplies.


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
LT1399CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LT1399CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LT1399CS#PBF SO-16 S C 05-08-1610 (S16) Yes
LT1399CS#TRPBF SO-16 S C 05-08-1610 (S16) Yes
LT1399HVCS#PBF SO-16 S C 05-08-1610 (S16) Yes
LT1399HVCS#TRPBF SO-16 S C 05-08-1610 (S16) Yes
LT1399IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LT1399IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LT1399IS#PBF SO-16 S I 05-08-1610 (S16) Yes
LT1399IS#TRPBF SO-16 S I 05-08-1610 (S16) Yes

LT1399 Package Drawing
LT1399 Package Drawing

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
LT1399CGN#PBF SSOP-16 C $2.85 $2.55 Yes
LT1399CGN#TRPBF SSOP-16 C $2.72 Yes
LT1399CS#PBF SO-16 C $2.75 $2.45 Yes
LT1399CS#TRPBF SO-16 C $2.51 Yes
LT1399HVCS#PBF SO-16 C $3.65 $3.05 Yes
LT1399HVCS#TRPBF SO-16 C $3.11 Yes
LT1399IGN#PBF SSOP-16 I $3.50 $2.95 Yes
LT1399IGN#TRPBF SSOP-16 I $3.01 Yes
LT1399IS#PBF SO-16 I $3.35 $2.80 Yes
LT1399IS#TRPBF SO-16 I $2.86 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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


  • RGB Cable Drivers
  • LCD Drivers
  • Spread Spectrum Amplifiers
  • MUX Amplifiers
  • Composite Video Cable Drivers
  • Portable Equipment

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