Alternative Parts

  • LT3048 Series
    LT3048 Series

    Low Noise Bias Generator in 2mm × 2mm DFN

  • LTC3265
    LTC3265

    Low Noise Dual Supply with Boost and Inverting Charge Pumps

Overview

Features and Benefits

  • Generates Two Independent Low Noise Bias Supplies
  • Boost Regulator:
    • Wide Input Voltage Range: 3V to 20V
    • Adjustable Switching Frequency: 450kHz to 2MHz
    • Synchronizable to External Clock
    • 950mA Power Switches
    • Integrated Schottky Diodes
    • Internal Frequency Compensation
  • Linear Regulator:
    • Wide Output Voltage Range: 1V to 20V
    • SET Pin Reference Current: 50μA
    • Low Noise: 4μVRMS (10Hz to 100kHz)
    • High Frequency PSRR: 72dB at 1MHz
  • Independent Precision-Threshold Enable Pins
  • Symmetric Pinout Simplifies PCB Layout
  • Thermally Enhanced 3mm × 5mm 24-Lead QFN Package

Product Details

The LT3095 generates two low-noise bias supplies from a common input voltage ranging from 3V to 20V. Each channel includes a fixed frequency, peak current-mode step-up switching regulator and a low-noise, singleresistor- programmable 50mA linear regulator. The linear regulator’s high power supply ripple rejection (PSRR) combined with its low-noise performance results in less than 100μVP-P output ripple and noise.

Each boost regulator adjusts its output voltage to 2V above the corresponding linear regulator’s output voltage, optimizing power dissipation, PSRR and transient response. This tracking scheme, along with internal boost regulator frequency compensation and integrated Schottky diodes, minimizes external component count and simplifies system design. Each linear regulator includes internal current limit and thermal limit protection circuitry.

The LT3095 switching frequency is externally programmable with a single resistor from 450kHz to 2MHz. A SYNC pin allows synchronization to an external clock. The LT3095 is available in a thermally enhanced, low profile (0.75mm) 24-lead 3mm × 5mm QFN package.

Applications

  • Noise-Sensitive USB Powered Applications
  • Data Conversion, Industrial Supplies, RF
  • Instrumentation Amplifiers

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:

LT3095

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.

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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.