LTC6401CUD-26#TRPBF

Overview

The Analog Devices LTC6401CUD-26#TRPBF 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 supply voltage between 2.85V and 3.5V with a typical current of 45mA. Key electrical specifications include a total input-referred noise of 1.5nV/√Hz, an equivalent output IP3 of 46.5dBm at 70MHz, and a common mode rejection ratio of 75dB. It utilizes a 16-lead 3mm x 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 26dB (20V/V) with a 50Ω differential input impedance.
• Includes independent external control for output common mode voltage, eliminating the need for transformers or AC-coupling capacitors in many applications.

Applications

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

Procurement Notes

Verify the specific temperature grade required for the application. The 'C' suffix indicates commercial grade operation (0°C to 70°C), whereas the 'I' suffix denotes industrial grade (-40°C to 85°C). Ensure the ordering suffix matches the environmental requirements. Confirm the tape and reel packaging format corresponds to the '#TRPBF' designation before finalizing procurement orders.

Selection Notes

Select this component when a fixed 26dB gain is required for broadband signal processing up to 140MHz. It is suitable for designs needing direct ADC interfacing without external matching networks. Consider the LTC6400 series if lower distortion is prioritized over power consumption, as it offers similar noise performance but higher current draw. Verify that the 45mA supply current fits the system power budget.

Part Context

This part belongs to the LTC6401 family of high-speed differential amplifiers. It shares the same 16-lead QFN package and pinout with other gain variants such as the LTC6401-8 and LTC6401-20. The device is manufactured by Analog Devices Inc. and is distinct from the lower-distortion LTC6400 family, which requires higher supply currents for improved linearity.

Replacement Considerations

LTC6401IUD-26#TRPBF