LTC6417 - 1.6GHz Low Noise High Linearity Differential Buffer/16-Bit ADC Driver with Fast Clamp

Features

  • 1.6GHz –3dB Small Signal Bandwidth
  • Low Distortion Driving 50Ω Load, 2.4VP-P Out
      -100dBc/–69dBc HD2/HD3 at 140MHz
      -80dBc IM3 and 46dBm OIP3 at 140MHz
      -100dBc/–66dBc HD2/HD3 at 380MHz
      -68dBc IM3 and 39dBm OIP3 at 380MHz
  • 1.5nV/√Hz Output Noise
  • 4.3pA/√Hz Input Current Noise
  • Programmable High Speed, Fast Recovery Output Clamping
  • 4.28P-P Maximum Output Swing on a 50Ω Differential Load
  • DC-Coupled Signal Path
  • Operates on Single 4.75V to 5.25V Supply
  • Power: 615mW on 5V, Can Be Reduced to 370mW,
  • Shutdown Mode 120mW
  • 3mm x 4mm 20-Lead QFN Package

Typical Application

LTC6417 Typical Application
LTC6417 Typical Application

Description

The LTC6417 is a differential unity gain buffer that can drive a 50Ω load with extremely low noise and excellent linearity. It is well suited for driving high speed 14- and 16-bit pipeline ADCs with input signals from DC to beyond 600MHz. Differential input impedance is 18.5kΩ, allowing 1:4 and 1:8 transformers to be used at the input providing additional system gain in 50Ω systems.

With no external biasing or gain setting components and a flow-through pinout, the LTC6417 is very easy to use. It can be DC-coupled and has a common mode output offset of -60mV. The LTC6417 input pins are internally biased to provide an output common mode voltage that is set by the voltage on the VCM pin for AC-coupled applications.

Supply current is typically 123mA and the LTC6417 operates on supply voltages ranging from 4.75V to 5.25V. Power consumption can be reduced to 74mA via the PWRADJ pin. The LTC6417 also has a hardware shutdown feature which reduces current consumption to 24mA.

The LTC6417 features fast, adjustable output voltage clamping to help protect subsequent circuitry. The CLHI pin sets the maximum swing, while a symmetric minimum swing is set up internally. LTC6417 VOR pin will signal overrange when the clamps limit output voltage.

The LTC6417 is packaged in a 20-lead 3mm x 4mm QFN package. Pinout is optimized for placement directly adjacent to Linear Technology’s high speed 14- and 16-bit ADCs.

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
LTC6417CUDC#PBF 3x4 QFN-20 UDC C 05-08-1742 Yes
LTC6417CUDC#TRPBF 3x4 QFN-20 UDC C 05-08-1742 Yes
LTC6417IUDC#PBF 3x4 QFN-20 UDC I 05-08-1742 Yes
LTC6417IUDC#TRPBF 3x4 QFN-20 UDC I 05-08-1742 Yes


LTC6417 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
(1-99)
Price
(1k)*
RoHS
LTC6417CUDC#PBF 3x4 QFN-20 C $5.56 $3.89 Yes
LTC6417CUDC#TRPBF 3x4 QFN-20 C $3.95 Yes
LTC6417IUDC#PBF 3x4 QFN-20 I $6.13 $4.29 Yes
LTC6417IUDC#TRPBF 3x4 QFN-20 I $4.35 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
DC1660B LTC6417 Demo Circuit 1.6GHz differential ADC buffer, drives 50 Ohm load $100.00
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Click here to view our complete list of demo boards

Applications

  • Differential ADC Driver
  • CCD Buffer
  • Cable Driver
  • 50Ω Buffer

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Design Tools

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Models for the following parts are available in LTspice:
LTC6417

Technical Support