LT5554IUH#TRPBF

Video Amps And Modules Overview

The LT5554IUH#TRPBF is a broadband ultra-low distortion 7-bit digitally controlled programmable gain amplifier (VGA) from Analog Devices Inc. It features a 16dB gain control range with 0.125dB step resolution and operates within a 1GHz bandwidth at all gains. The device provides high linearity, achieving an OIP3 of 48dBm at 200MHz with a 50Ω output resistance. Key electrical parameters include a 20dBm P1dB output compression point at 70MHz, an input-referred noise spectral density of 1.4nV/√Hz, and a fast gain settling time of 5ns. It utilizes a 32-lead QFN package.

Video Amps And Modules Feature Summary

• Features a 7-bit digitally controlled architecture combining coarse 4dB input attenuation steps with fine transconductance amplifier steps for precise gain adjustment.
• Provides unconditional stability over any loading conditions due to internal circuitry that enables open output collectors.
• Includes internal protection against overdrive conditions and incorporates an on-chip power supply regulator.

Video Amps And Modules Applications

• Differential ADC Driver
• IF Sampling Receivers
• VGA IF Power Amplifier

Video Amps And Modules Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing this component. Ensure compatibility with the 32-lead QFN footprint during PCB layout. Confirm the operating temperature range requirements align with the specified -40°C to +85°C limits before finalizing procurement decisions.

Video Amps And Modules Selection Notes

Select this component for applications requiring continuous gain control with high linearity and low distortion. Consider the 5ns settling time and overdrive recovery speed for dynamic signal processing needs. Evaluate the 1GHz bandwidth capability against the target frequency spectrum to ensure adequate performance margins.

Video Amps And Modules Part Context

This part belongs to the LT5554 series of programmable gain amplifiers designed for RF and IF signal chains. It serves as a versatile solution for systems demanding precise digital gain management without compromising signal integrity or introducing significant noise figures.

Video Amps And Modules Replacement Considerations

Consult manufacturer documentation for direct substitutes. Verify pinout compatibility and electrical specifications match if considering alternative VGA models from other manufacturers.

Video Amps And Modules FAQ

How is the gain control implemented?

Gain control is implemented via seven parallel digital inputs (PG0-PG6) and a STROBE input, allowing direct coupling to TTL or ECL drivers.

What is the reverse isolation performance?

The device provides approximately -80dB reverse isolation at 300MHz.