Overview

Features and Benefits

  • Gain Bandwidth Product: 4GHz
  • Low Input Bias Current:
    • ±3fA Typ. Room Temperature
    • 4pA Max at 125°C
  • Current Noise (100kHz): 7fA/√Hz
  • Voltage Noise (1MHz): 4.0nV/√Hz
  • Extremely Low CIN 0.45pF
  • Rail-to-Rail Output
  • AV ≥10
  • Slew Rate: +1500V/μs, –1000V/μs
  • Supply Range: 3.1V to 5.25V
  • Quiescent Current: 16.5mA
  • Operating Temp Range: –40°C to 125°C
  • Single in 8-Lead SO-8, 6-Lead TSOT-23 Packages
  • Dual in 8-Lead MS8, 3mm × 3mm 10-Lead DFN 10 Packages

Product Details

The LTC6268-10/LTC6269-10 is a single/dual 4GHz FET-input operational amplifier with extremely low input bias current and low input capacitance. It also features low input-referred current noise and voltage noise making it an ideal choice for high speed transimpedance amplifiers, and high-impedance sensor amplifiers. It is a decompensated op amp that is gain-of-10 stable.

It operates on 3.1V to 5.25V supply and consumes 16.5mA per amplifier. A shutdown feature can be used to lower power consumption when the amplifier is not in use.

The LTC6268-10 single op amp is available in 8-lead SOIC and 6-lead SOT-23 packages. The SOIC package includes two unconnected pins which can be used to create an input pin guard ring to protect against board leakage currents. The LTC6269-10 dual op amp is available in 8-lead MSOP with exposed pad and 3mm × 3mm 10-lead DFN packages. They are fully specified over the –40°C to 85°C and the –40°C to 125°C temperature ranges.

Applications

  • Transimpedance Amplifiers
  • ADC Drivers
  • Photomultiplier Tube Post-Amplifier
  • Low IBIAS Circuits

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice

Models for the following parts are available in LTspice:

LTC6268
LTC6268-10

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LTC6268-10 Discussions

Re: TIA LTC6268-10 input overdrive - this is bad?
20 week(s) ago in Optical Sensing
Re: TIA LTC6268-10 input overdrive - this is bad?
21 week(s) ago in Optical Sensing
TIA LTC6268-10 input overdrive - this is bad?
22 week(s) ago in Optical Sensing
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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.