LTC6404 - 600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifier/Driver


  • Fully Differential Input and Output
  • Low Noise: 1.5nV/√Hz RTI
  • Very Low Distortion:
       LTC6404-1 (2VP-P , 10MHz): –91dBc
       LTC6404-2 (2VP-P , 10MHz): –96dBc
       LTC6404-4 (2VP-P , 10MHz): –101dBc
  • Closed-Loop –3dB Bandwidth: 600MHz
  • Slew Rate: 1200V/μs (LTC6404-4)
  • Adjustable Output Common Mode Voltage
  • Rail-to-Rail Output Swing
  • Input Range Extends to Ground
  • Large Output Current: 85mA (Typ)
  • DC Voltage Offset < 2mV (Max)
  • Low Power Shutdown
  • Tiny 3mm × 3mm × 0.75mm 16-Pin QFN Package

Typical Application

LTC6404 Typical Application
LTC6404 Typical Application


The LTC6404 is a family of AC precision, very low noise, low distortion, fully differential input/output amplifiers optimized for 3V, single supply operation.

The LTC6404-1 is unity-gain stable. The LTC6404-2 is designed for closed-loop gains greater than or equal to 2V/V. The LTC6404-4 is designed for closed-loop gains greater than or equal to 4V/V. The LTC6404 closed-loop bandwidth extends from DC to 600MHz. In addition to the normal unfiltered outputs (OUT+ and OUT–), the LTC6404 has a built-in 88.5MHz differential single-pole lowpass filter and an additional pair of filtered outputs (OUTF+, OUTF–). An input referred voltage noise of 1.5nV/√Hz make the LTC6404 able to drive state-of-the-art 16-/18-bit ADCs while operating on the same supply voltage, saving system cost and power. The LTC6404 is characterized, and maintains its performance for supplies as low as 2.7V and can operate on supplies up to 5.25V. It draws only 27.3mA, and has a hardware shutdown feature which reduces cur- rent consumption to 250μA.

The LTC6404 family is available in a compact 3mm × 3mm 16-pin leadless QFN package and operates over a –40°C to 125°C temperature range.


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
LTC6404CUD-1#PBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6404CUD-1#TRPBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6404CUD-2#PBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6404CUD-2#TRPBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6404CUD-4#PBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6404CUD-4#TRPBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6404HUD-1#PBF 3x3 QFN-16 UD H 05-08-1691 Yes
LTC6404HUD-1#TRPBF 3x3 QFN-16 UD H 05-08-1691 Yes
LTC6404HUD-2#PBF 3x3 QFN-16 UD H 05-08-1691 Yes
LTC6404HUD-2#TRPBF 3x3 QFN-16 UD H 05-08-1691 Yes
LTC6404HUD-4#PBF 3x3 QFN-16 UD H 05-08-1691 Yes
LTC6404HUD-4#TRPBF 3x3 QFN-16 UD H 05-08-1691 Yes
LTC6404IUD-1#PBF 3x3 QFN-16 UD I 05-08-1691 Yes
LTC6404IUD-1#TRPBF 3x3 QFN-16 UD I 05-08-1691 Yes
LTC6404IUD-2#PBF 3x3 QFN-16 UD I 05-08-1691 Yes
LTC6404IUD-2#TRPBF 3x3 QFN-16 UD I 05-08-1691 Yes
LTC6404IUD-4#PBF 3x3 QFN-16 UD I 05-08-1691 Yes
LTC6404IUD-4#TRPBF 3x3 QFN-16 UD I 05-08-1691 Yes

LTC6404 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
LTC6404CUD-1#PBF 3x3 QFN-16 C $4.91 $3.44 Yes
LTC6404CUD-1#TRPBF 3x3 QFN-16 C $3.50 Yes
LTC6404CUD-2#PBF 3x3 QFN-16 C $4.91 $3.44 Yes
LTC6404CUD-2#TRPBF 3x3 QFN-16 C $3.50 Yes
LTC6404CUD-4#PBF 3x3 QFN-16 C $4.91 $3.44 Yes
LTC6404CUD-4#TRPBF 3x3 QFN-16 C $3.50 Yes
LTC6404HUD-1#PBF 3x3 QFN-16 H $6.23 $4.36 Yes
LTC6404HUD-1#TRPBF 3x3 QFN-16 H $4.40 Yes
LTC6404HUD-2#PBF 3x3 QFN-16 H $6.23 $4.36 Yes
LTC6404HUD-2#TRPBF 3x3 QFN-16 H $4.40 Yes
LTC6404HUD-4#PBF 3x3 QFN-16 H $6.23 $4.36 Yes
LTC6404HUD-4#TRPBF 3x3 QFN-16 H $4.40 Yes
LTC6404IUD-1#PBF 3x3 QFN-16 I $5.41 $3.79 Yes
LTC6404IUD-1#TRPBF 3x3 QFN-16 I $3.85 Yes
LTC6404IUD-2#PBF 3x3 QFN-16 I $5.41 $3.79 Yes
LTC6404IUD-2#TRPBF 3x3 QFN-16 I $3.85 Yes
LTC6404IUD-4#PBF 3x3 QFN-16 I $5.41 $3.79 Yes
LTC6404IUD-4#TRPBF 3x3 QFN-16 I $3.85 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.

Part Number Description Price Documentation
DC1058A-B Combo Demoboard for LTC2207 and LTC6404-1, req. DC718 $200.00
DC1058A-C Combo Demoboard for LTC2207 and LTC6404-2, req. DC718 $200.00
DC1058A-D Combo Demoboard for LTC2207 and LTC6404-4, req. DC718 $200.00
DC1147A-A LTC6404-1 demo circuit $100.00
DC1147A-B LTC6404-2 demo circuit $100.00
DC1147A-C LTC6404-4 demo circuit $100.00
DC2623A LTC6404-1 + AD8002 ADC Driver Board | Low Distortion ADC Driver for LTC2387 family, Input Frequencies >1MHz $25.00
Buy Now

Companion Boards

Part Number Description Price Documentation
DC718C USB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps) $300.00
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Click here to view our complete list of demo boards


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