LTC6400IUD-8#TRPBF

Overview

The LTC6400IUD-8#TRPBF is a high-speed differential amplifier designed for processing signals from DC to 300MHz. It features a fixed gain of 2.5V/V (8dB) and a –3dB bandwidth of 2.2GHz. The device operates on a supply voltage ranging from 2.85V to 3.5V with a typical supply current of 85mA. Key electrical characteristics include an input impedance of 400Ω, an output common mode voltage adjustable between 1V and 1.6V, and a noise figure of 7.6dB at 10MHz. 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 fully differential inputs and outputs with an internally fixed gain of 8dB.
• Includes an external pin for setting the output common mode voltage, eliminating the need for transformers or AC-coupling capacitors in many applications.
• Offers flexible input and output coupling options, supporting both DC and AC-coupled operation.

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the IUD designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure compatibility with the required 3V supply voltage and check for lead-free finish compliance as indicated by the PBF marking.

Selection Notes

Select this component when a fixed 8dB gain and wide bandwidth are required for intermediate frequency signal processing. Compare against the LTC6401 family if lower power consumption is prioritized over linearity, noting that the LTC6401 exhibits higher non-linearity at frequencies above 140MHz. Consider the 400Ω input impedance for direct matching requirements.

Part Context

This part belongs to the LTC6400 family of high-speed differential amplifiers manufactured by Analog Devices Inc. It is functionally similar to the LTC6401 series but draws higher current to achieve superior linearity. The IUD-8 variant specifically denotes the industrial grade version packaged in a 16-lead QFN format.

Replacement Considerations

The LTC6401IUD-8#TRPBF is a pin-compatible alternative within the same family. Note that while it shares the same package and basic functionality, the LTC6401 offers lower power consumption at the expense of slightly higher non-linearity, particularly at input frequencies exceeding 140MHz.