Overview

Features and Benefits

  • Amplifier
    • Current Limit: ±40mA Typical
    • Input Common Mode Range: 0V to 10V
    • Output Voltage Range: 1V to (VCC – 1V)
    • Differential Gain Stage with High Impedance Output
    • (gm Stage)
    • Quiescent Current (from VCC): 2mA
    • Unloaded Gain: 30,000 Typical
  • Switching Regulator
    • Generates VCC Up to 35V
    • Wide Operating Supply Range: 2.5V to 16V
    • High Switching Frequency: 1.3MHz
    • Internal Schottky Diode
    • Tiny External Components
    • Current Mode Switcher with Internal Compensation
    • Low Profile (1mm) SOT-23 Package

Product Details

The LT3469 is a transconductance (gm) amplifier that can drive outputs up to 33V from a 5V or 12V supply. An internal switching regulator generates a boosted supply voltage for the gm amplifier. The amplifier can drive capacitive loads in the range of 5nF to 300nF. Slew rate is limited only by the maximum output current. The 35V output voltage capability of the switching regulator, along with the high supply voltage of the amplifier, combine to allow the wide output voltage range needed to drive a piezoceramic microactuator.

The LT3469 switching regulator switches at 1.3MHz, allowing the use of tiny external components. The output capacitor can be as small as 0.22µF, saving space and cost versus alternative solutions.

The LT3469 is available in a low profile ThinSOT package.

Applications

  • Piezo Speakers
  • Piezo Microactuators
  • Varactor Bias

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.

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Models for the following parts are available in LTspice:

LT3469

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.