LT5514 Datasheet | Linear Technology

.. Ultralow Distortion IF Amplifier/ADC Driver with Digitally Controlled Gain Features s s s s s s s s s s s s s s s s s DESCRIPTIO U APPLICATIO S s s s s s Output IP3 at 100MHz: 47d Bm Maximum Output Power: 21d Bm Bandwidth: LF to 850MHz Propagation Delay: 0.8ns Maximum Gain: 33d B Noise Figure: 7.3d B (Max Gain) Gain Control Range: 22.5d B Gain Control Step: 1.5d B Gain Control Settling Time: 500ns Output Noise Floor: - 134d Bm/Hz (Max Gain) Reverse Isolation: - 80d B Single Supply: 4.75V to 5.25V Low Power Mode Shutdown Mode Enable/Disable Time: 1µs Differential I/O Interface 20-Lead TSSOP Package The LT®5514 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 LT5514 offers an OIP3 of +47d Bm (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 22.5d B range with 1.5d B step resolution. An on-chip power supply regulator/filter helps isolate the amplifier signal path from external noise sources. The LT5514’s open-loop architecture offers stable operation for any practical load conditions, including peakingfree AC response when driving capacitive loads, and excellent reverse isolation. The LT5514 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. , LTC and LT are registered trademarks of Linear Technology Corporation. High Linearity ADC Driver IF Sampling Receivers VGA IF Power Amplifier 50Ω Driver Instrumentation Applications TYPICAL APPLICATIO 5V CHOKE 0.1µF RF INPUT LO IF BPF IF AMP...