LTC6268-10
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LTC6268-10

4GHz Ultra-Low Bias Current FET Input Op Amp

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LTspice LTC6268-10 Demo Circuit - Oscilloscope Differential Probe Download 7.00KB LTspice LTC6268-10 - Operational Amplifiers (Op Amps) Download 1.62 KB
Part Models 9
1ku List Price Starting From $4.07
Features
  • 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
Additional Details
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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
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file View Data Sheet
Documentation View All Documentation
LTspice LTC6268-10 Demo Circuit - Oscilloscope Differential Probe Download 7.00KB LTspice LTC6268-10 - Operational Amplifiers (Op Amps) Download 1.62 KB
Part Models 9
1ku List Price Starting From $4.07
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LTC6268-10

Documentation

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Data Sheet

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UPDATED 04/02/2015
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LTC6268-10/LTC6269-10: 4GHz Ultra-Low Bias Current FET Input Op Amp Data Sheet

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UPDATED 04/02/2015
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LTC6268-10/LTC6269-10：4GHz 超低偏置电流 FET输入运算放大器

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UPDATED 05/19/2015
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LTC6268-10/LTC6269-10: 超低バイアス電流の 4 GHz FET 入力オペアンプ データシート

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User Guide

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UPDATED 01/03/2017
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DC2414A - Demo Board Manual redirect icon

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Spec Notice

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UPDATED 07/14/2015
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LTC6268-10 Dice Specification redirect icon

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UPDATED 08/10/2016
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Transimpedance Amplifiers for Wide Range Photodiodes Have Challenging Requirements redirect icon

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UPDATED 04/20/2015
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用于宽范围光电二极管的跨阻抗放大器具有苛刻的要求 redirect icon

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UPDATED 07/01/2015
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Op Amp Combines Femtoamp Bias Current with 4GHz Gain Bandwidth Product, Shines New Light on Photonics Applications redirect icon

Reliability Data

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UPDATED 03/23/2018
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R561 Reliability Data redirect icon

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Documentation

Technical Documents 6
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Data Sheet 1

LTC6268-10/LTC6269-10: 4GHz Ultra-Low Bias Current FET Input Op Amp Data Sheet

Reliability Data 1

R561 Reliability Data

User Guide 1

DC2414A - Demo Board Manual

Technical Articles 2

Transimpedance Amplifiers for Wide Range Photodiodes Have Challenging Requirements
Op Amp Combines Femtoamp Bias Current with 4GHz Gain Bandwidth Product, Shines New Light on Photonics Applications

Spec Notice 1

LTC6268-10 Dice Specification

Solutions Bulletin & Brochure 1

4GHz, 3fA, 0.45pF Op Amp

Video

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Video

2017-09-18

High Bandwidth, Very Low Input Bias Current Op Amp

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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. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC6268-10DICE CHIPS OR DIE
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268HS6-10#TRMPBF 6-Lead TSOT-23 external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268HS6-10#TRPBF 6-Lead TSOT-23 external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268HS8-10#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268HS8-10#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268IS6-10#TRMPBF 6-Lead TSOT-23 external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268IS6-10#TRPBF 6-Lead TSOT-23 external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268IS8-10#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC6268IS8-10#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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Product Lifecycle

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Oct 12, 2022

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LTC6268HS8-10#PBF

PRODUCTION

LTC6268HS8-10#TRPBF

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LTC6268IS8-10#TRPBF

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Jun 16, 2021

- 21_0026

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LTC6268HS8-10#PBF

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LTC6268HS8-10#TRPBF

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LTC6268IS8-10#PBF

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PCN21_0026_Form

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Delta Qualification Matrix

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PCN

Oct 12, 2022

- 22_0255

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Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LTC6268HS8-10#PBF

PRODUCTION

LTC6268HS8-10#TRPBF

PRODUCTION

LTC6268IS8-10#PBF

PRODUCTION

LTC6268IS8-10#TRPBF

PRODUCTION

pdf

PCN22_0255_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Jun 16, 2021

- 21_0026

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Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LTC6268HS8-10#PBF

PRODUCTION

LTC6268HS8-10#TRPBF

PRODUCTION

LTC6268IS8-10#PBF

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LTC6268IS8-10#TRPBF

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PCN21_0026_Form

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Delta Qualification Matrix

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Software & Part Ecosystem

Evaluation Kits 1

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DC2414A

Un-Populated Demonstration Circuit; Supports 3 Channels of LTC6268 & LTC6268-10/LTC6226X

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DC2414A

Un-Populated Demonstration Circuit; Supports 3 Channels of LTC6268 & LTC6268-10/LTC6226X

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DC2414A
Un-Populated Demonstration Circuit; Supports 3 Channels of LTC6268 & LTC6268-10/LTC6226X
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Product Detail

Demonstration Circuit 2414A has layouts for three channels of SOT-23 transimpedance amplifiers. Each of the three layouts applies different techniques achieving various parasitic feedback capacitances (CF). The upper channel, U3, assumes a low Transimpedance gain, has a parasitic CF of 0.1pF, and provides a footprint for an additional component CF in an 0402 footprint (C29). The lower channel, U1, assumes high transimpedance gain and was laid out to minimize CF, achieving approximately 7fF, although the real situation is more complex. The middle channel, U2, assumes a middle case. The outputs of the circuit are laid out for SMA edge connectors. The inputs consist of six pads per channel along the edge where a through-hole photodiode can be mounted, with provision for any photodiode pinout.

Resources

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DC2414A - Schematic Download

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DC2414A - Demo Board Manual Download

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DC2414A - Design Files Download

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Evaluation Kits1

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DC2414A

Un-Populated Demonstration Circuit; Supports 3 Channels of LTC6268 & LTC6268-10/LTC6226X

Tools & Simulations 4

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.

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LTC6268-10 Demo Circuit - Oscilloscope Differential Probe Download

7.00K

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LTC6268-10 - Operational Amplifiers (Op Amps) Download

1.62 K

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