LT1256CS#TRPBF

Video Amps And Modules Overview

The LT1256CS#TRPBF is a single-channel, 40MHz current feedback video amplifier manufactured by Analog Devices Inc. in a 14-lead SOIC package. It provides accurate linear gain control with a typical accuracy of ±1% and maximum of ±3%. Key electrical parameters include a 300V/μs slew rate, 40MHz small-signal bandwidth at ±15V supply, and 13mA typical supply current. The device operates on supplies ranging from ±2.5V to ±15V (or single 5V to 30V) and features low output noise of 2.7nV/√Hz.

Video Amps And Modules Feature Summary

• Features an integrated linear control circuit that accurately sets the contribution of two inputs to the output signal.
• Provides constant gain performance across temperature variations without requiring external compensation components.
• Delivers high-speed signal processing capabilities with a wide bandwidth and fast control path response.

Video Amps And Modules Applications

• Composite video gain control circuits
• RGB and YUV video gain adjustment systems
• Electronic video faders and keyers
• Gamma correction amplifiers

Video Amps And Modules Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing. Confirm the CS designation corresponds to the commercial temperature range of 0°C to 70°C as specified in the datasheet. Ensure the component matches the 14-lead SOIC physical footprint for PCB integration. Cross-reference the manufacturer part number with official Analog Devices documentation to avoid counterfeit parts.

Video Amps And Modules Selection Notes

Select the LT1256 over the LT1251 when a fully linear control range exceeding 20dB is required, as the LT1251 includes internal circuitry to force inputs fully off or on near the extremes. Consider the 40MHz bandwidth and 300V/μs slew rate for high-frequency video applications. Evaluate the ±2.5V to ±15V supply flexibility against system power constraints. Check input bias current requirements against source impedance limitations.

Video Amps And Modules Part Context

This component belongs to the LT1251/LT1256 family of 2-input, 1-output current feedback amplifiers designed for video signal processing. While the LT1251 offers sharp switching characteristics for fader applications, the LT1256 variant maintains linearity throughout the entire control voltage range. Both devices share identical core amplifier specifications but differ in their control logic implementation.

Video Amps And Modules Replacement Considerations

LT1256CN#PBF

Video Amps And Modules FAQ

How does the LT1256 differ from the LT1251 regarding control linearity?

The LT1256 operates linearly over the complete control range, making it suitable for applications requiring more than 20dB of linear control. In contrast, the LT1251 includes circuitry that forces one input completely off and the other on at the extremes of the control range.

What is the recommended feedback resistor value for optimal performance?

The datasheet specifies using 1.5kΩ feedback resistors (RF1 and RF2) for standard operation to achieve the specified bandwidth and gain accuracy. Deviations may affect bandwidth and linearity.