LT LT5514EFE#PBF

Усилитель/Драйвер АЦПНЧ ~ 850 МГц

Overview

The LT5514EFE is a programmable gain amplifier (PGA) with bandwidth extending from low frequency (LF) to 850MHz. It consists of a digitally controlled variable attenuator, followed by a high linearity amplifier. The amplifier is configured with two identical transconductance amplifiers, hard wired in parallel with individual dedicated enable pins. When both amplifiers are enabled (Standard mode), the LT5514EFE offers an OIP3 of +47dBm (at 100MHz). Power dissipation can be reduced when a single amplifier is enabled (Low Power mode). Four parallel digital inputs control the gain over a 22.5dB range with 1.5dB step resolution. An on-chip power supply regulator/filter helps isolate the amplifier signal path from external noise sources.

The LT5514EFE may be operated broadband, where the output differential RC time constant sets the bandwidth, or it may be used as a narrowband driver with the appropriate output filter.

Features

Applications

• Phase modulation
• Variable matched attenuator
• Phase shifter
• Cellular base stations
• Radio links
• Fixed wireless access
• Broadband/CATV
• RF/IF analog multiplexer
• Balanced modulation
• Demodulation