LT6557IGN#TRPBF

Video Amps And Modules Overview

The LT6557IGN#TRPBF is a high-speed triple video amplifier featuring an internal fixed gain of 2 and programmable DC input bias voltage. It offers a –3dB small-signal bandwidth of 500MHz, a large-signal bandwidth of 400MHz at 2VP-P, and a slew rate of 2200V/µs. The device operates on a single supply ranging from 3V to 7.5V, with full video swing capability using a 5V supply. It includes separate power and ground pins for each channel to minimize crosstalk and features an enable/shutdown pin. The component is housed in a 16-lead SSOP package.

Video Amps And Modules Feature Summary

• Triple-channel architecture with independent power and ground pins per amplifier to enhance channel separation and reduce crosstalk.
• Integrated programmable DC input bias control via a single external resistor, simplifying AC-coupled circuit designs.
• Capable of driving heavy output loads with voltage swings extending to within 0.8V of the supply rails.
• Includes an enable/shutdown control pin that reduces total supply current to approximately 10µA when deactivated.

Video Amps And Modules Applications

• LCD Video Projectors
• RGB HD Video Amplifiers
• Coaxial Cable Drivers
• Low Supply ADC Drivers

Video Amps And Modules Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging and lead-free compliance. Confirm the IGN designation corresponds to the industrial temperature grade (-40°C to 85°C) and the GN package type (16-lead SSOP). Ensure the source documentation explicitly supports these ordering options before finalizing procurement specifications.

Video Amps And Modules Selection Notes

Select this component for wideband video applications requiring a single 5V supply and high slew rates. It is suitable where minimizing external components for AC coupling is prioritized due to the built-in bias control. Consider thermal management requirements, as junction temperature limits are 150°C for the SSOP package. Evaluate if the fixed gain of 2 meets the system signal chain requirements without additional amplification stages.

Video Amps And Modules Part Context

The LT6557 belongs to Analog Devices' family of high-speed video amplifiers designed for demanding visual processing tasks. It complements related parts like the LT6553 and LT6554 by offering a balance of speed and integrated biasing features. The device is engineered for low-voltage operation, making it appropriate for modern portable and compact video equipment where power efficiency and signal integrity are critical.

Video Amps And Modules Replacement Considerations

Public confirmed substitute part numbers include LT6553, LT6554, LT6555, LT6556, and LT6558. Verify compatibility regarding gain settings, bandwidth, and package dimensions before substitution.

Video Amps And Modules FAQ

How is the input bias voltage programmed?

The input bias voltage is set by connecting a programming resistor between the BCV pin (Pin 16) and the GND pin (Pin 2). For a single 5V supply, a 400Ω resistor is generally optimal.

What is the function of the EN pin?

The EN pin controls the enable/shutdown state. Pulling it low enables the amplifier, while leaving it open activates shutdown mode, reducing supply current to approximately 10µA.

Can the internal biasing circuit be disabled?

Yes, leaving the BCV pin (Pin 16) open disables the internal biasing circuit, allowing for the use of an external clamp circuit or direct coupled input configurations.