LT1256CN

Video Amps And Modules Overview

The LT1256CN is a 40MHz video fader and DC gain controlled amplifier manufactured by Analog Devices Inc. It features a linear control circuit for accurate gain adjustment with ±3% maximum accuracy. The device operates on supply voltages ranging from ±2.5V to ±15V, providing a high slew rate of 300V/μs and a fast control path bandwidth of 10MHz. It includes low output noise and distortion characteristics suitable for professional video applications.

Video Amps And Modules Feature Summary

• Accurate linear gain control with constant temperature stability
• High bandwidth and fast slew rate for video signal processing
• Low control feedthrough and minimal differential gain/phase errors
• Wide supply voltage range with low power consumption

Video Amps And Modules Applications

• Composite video gain control
• RGB and YUV video gain control
• Video faders and keyers
• Gamma correction amplifiers
• Audio gain control and faders

Video Amps And Modules Procurement Notes

Verify the specific package type (PDIP or SOIC) and commercial grade temperature rating when ordering. Confirm that the LT1256 variant is selected over the LT1251 if full linear control without hard off/on switching is required. Ensure supply rails match the specified operating range for optimal performance.

Video Amps And Modules Selection Notes

Choose the LT1256CN over the LT1251 when applications require continuous linear gain control across the entire range without the internal hard-limiting circuitry found in the LT1251. This part is ideal for scenarios needing more than 20dB of linear control range where precise analog mixing is critical.

Video Amps And Modules Part Context

The LT1256CN belongs to the LT1251/LT1256 family of current feedback amplifiers designed for high-speed video applications. It shares core specifications with the LT1251 but lacks the internal circuitry that forces inputs fully on or off at extreme control levels, allowing for smoother, uninterrupted gain transitions.

Video Amps And Modules Replacement Considerations

LT1251CN

Video Amps And Modules FAQ

What is the primary difference between the LT1256 and LT1251?

The LT1256 provides linear gain control over the complete range, whereas the LT1251 includes internal circuitry that forces one input completely off and the other on at extreme control levels to eliminate feedthrough.

What is the recommended supply voltage range?

The device operates on supplies from ±2.5V (single 5V) to ±15V (single 30V).