LTC6401CUD-26#PBF

Overview

The LTC6401CUD-26#PBF is a high-speed differential amplifier designed for processing signals from DC to 140MHz. It features a fixed gain of 26dB (20V/V) and a 1.6GHz -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, offering a 50Ω input impedance and adjustable output common mode voltage between 1V and 1.6V via the VOCM pin. Packaged in a compact 16-lead 3mm × 3mm QFN, it targets driving 12-, 14-, and 16-bit ADCs.

Feature Summary

• Fixed internal gain of 26dB (20V/V) eliminates external feedback components.
• Differential architecture with 50Ω input impedance simplifies RF interface matching.
• Adjustable output common mode voltage allows direct ADC interfacing without transformers.
• Integrated low-pass filtering at filtered outputs aids in noise reduction.

Applications

• Differential ADC Driver
• Single Ended to Differential Conversion
• IF Sampling Receivers
• SAW Filter Interfacing

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free finish and tube packaging as distinct from tape and reel options. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C rather than the industrial range. Ensure the datasheet version matches the manufacturing date code for accurate electrical parameter validation.

Selection Notes

Select this component when a fixed 26dB gain is required for broadband signal conditioning up to 140MHz. Compare against the LTC6400 series if lower distortion is prioritized over power efficiency, noting the higher current draw of that family. Consider the LTC6401IUD-26#PBF if operation below 0°C is necessary, as the C-grade part is not guaranteed for those conditions.

Part Context

This part belongs to the LTC6401 family of high-speed differential amplifiers. It shares the same package and pinout with other gain variants like the LTC6401-8 and LTC6401-20. The device is functionally similar to the LTC6400 series but optimized for lower power consumption at the expense of slightly higher distortion metrics.

Replacement Considerations

LTC6401IUD-26#PBF offers identical electrical performance with an extended operating temperature range of –40°C to 85°C.