LTC6401IUD-20#PBF

Overview

The LTC6401IUD-20#PBF is a high-speed differential amplifier designed for processing signals from DC to 140MHz. It features a fixed gain of 20dB (10V/V) and a –3dB bandwidth of 1.3GHz. The device operates on a supply voltage ranging from 2.85V to 3.5V with a typical supply current of 50mA. Key electrical specifications include an input-referred noise density of 2.1nV/√Hz, a third-order intermodulation distortion (IMD3) of –93dBc at 70MHz, and a maximum differential output swing of 4.4V P-P. It is housed in a compact 16-lead 3mm × 3mm QFN package.

Feature Summary

• Provides low noise and low distortion performance specifically optimized for driving 12-, 14-, and 16-bit ADCs.
• Features internally fixed gain of 20dB with minimal external support circuitry requirements.
• Includes adjustable output common mode voltage control independent of inputs.
• Offers flexible single-ended to differential conversion capabilities.

Applications

• Differential ADC Driver
• IF Sampling Receivers
• SAW Filter Interfacing

Procurement Notes

Verify the specific suffix 'IUD' indicates the industrial temperature range (-40°C to 85°C). Confirm the '#PBF' designation corresponds to lead-free packaging and tube shipping format. Cross-reference the manufacturer's discontinuation notices or lifecycle status to ensure long-term availability before finalizing design-in decisions.

Selection Notes

Select this component when a fixed 20dB gain is required for broadband signal conditioning up to 140MHz. Consider the 200Ω differential input impedance for source matching requirements. Evaluate the trade-off between the 50mA supply current and the need for low noise figures in high-dynamic-range applications compared to lower-power alternatives.

Part Context

This part belongs to the LTC6401 family of high-speed differential amplifiers. It shares pin compatibility and core architecture with other gain variants within the series. The 'I' grade denotes industrial temperature operation, distinguishing it from commercial grades. It serves as a direct replacement for discrete transformer-based driver solutions in space-constrained designs.

Replacement Considerations

LTC6401CUD-20#PBF