LTC6400CUD-14#PBF

Overview

The LTC6400CUD-14#PBF is a high-speed differential amplifier designed for processing signals from DC to 300MHz. It features a fixed gain of 5V/V (14dB) and a 2.4GHz –3dB bandwidth. The device operates on a supply voltage ranging from 2.85V to 3.5V with an 85mA supply current. Key electrical characteristics include a 200Ω differential input impedance, 25Ω differential output impedance, and a maximum differential output swing of 4.8V P-P. It includes an adjustable output common mode voltage control range of 1V to 1.6V.

Feature Summary

• Provides low noise and low distortion performance specifically optimized for driving 12-, 14-, and 16-bit ADCs.
• Features an internally fixed gain of 14dB (5V/V) requiring minimal external support circuitry.
• Includes an adjustable output common mode voltage pin that eliminates the need for transformers or AC-coupling capacitors in many applications.

Applications

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

Procurement Notes

Verify the specific ordering suffix '#PBF' indicates lead-free finish and tube packaging when sourcing. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C rather than the industrial range. Ensure compatibility with the 16-lead QFN package dimensions during procurement planning.

Selection Notes

Select this component for applications requiring a fixed 14dB gain and direct interfacing with high-resolution ADCs without external matching networks. Consider the commercial temperature range limitation if operating environments exceed 70°C. Evaluate the 85mA supply current against power constraints compared to the lower-power LTC6401 family variants.

Part Context

This part belongs to the LTC6400 series of fully differential amplifiers manufactured by Analog Devices Inc. It is distinct from the LTC6401 family, which offers lower power consumption but slightly higher non-linearity at frequencies above 140MHz. The device is housed in a compact 16-lead 3mm × 3mm plastic QFN package.

Replacement Considerations

The LTC6401-14#PBF is a pin-compatible alternative within the same family offering reduced power consumption. For different gain requirements, consider the LTC6400-8#PBF (8dB) or LTC6400-20#PBF (20dB). Verify thermal and linearity specifications match application needs when substituting.