LTC6401CUD-8#PBF

Overview

The LTC6401CUD-8#PBF is a high-speed differential amplifier designed for processing signals from DC to 140MHz. It features a fixed gain of 2.5V/V (8dB) and a 2.2GHz –3dB bandwidth. The device operates on a single supply voltage ranging from 2.85V to 3.5V with a typical current consumption of 45mA. It provides differential inputs and outputs, an adjustable output common mode voltage between 1V and 1.6V, and a maximum differential output swing of 4.6V P-P. Packaged in a compact 16-lead 3mm × 3mm QFN, it is specified for commercial temperature ranges.

Feature Summary

• Fixed internal gain of 8dB with low noise and low distortion characteristics optimized for driving high-resolution ADCs.
• Adjustable output common mode voltage control via external pin, eliminating the need for transformers or AC-coupling capacitors.
• Differential input impedance of 400Ω with integrated output filtering options for simplified system design.

Applications

• Differential ADC Driver
• IF Sampling Receivers
• Single Ended to Differential Conversion

Procurement Notes

Verify that the specific suffix 'C' corresponds to the commercial operating temperature range (0°C to 70°C) rather than the industrial grade (-40°C to 85°C). Confirm the package type matches the 16-lead QFN specification. Ensure the '#PBF' designation indicates lead-free finish compliance before finalizing procurement orders.

Selection Notes

Select this component when a fixed 8dB gain is required for signal conditioning up to 140MHz. It is suitable for applications needing direct interfacing with ADCs without external biasing networks. Consider the commercial temperature rating limits compared to the industrial variant if operation below 0°C is anticipated.

Part Context

This part belongs to the LTC6401 family of high-speed differential amplifiers. It shares pin compatibility and architectural similarities with other gain variants like the LTC6401-20 and LTC6401-26. The family is designed to replace traditional solutions involving IF gain blocks and transformers, offering space and power savings.

Replacement Considerations

The LTC6401IUD-8#PBF serves as a functional equivalent with an extended industrial temperature range. The LT6402 series offers lower distortion but different gain and bandwidth specifications.