LT5524 Datasheet | Linear Technology

.. Low Distortion IF Amplifier/ADC Driver with Digitally Controlled Gain Features - - - - - - - - - - - - - - - - DESCRIPTIO U APPLICATIO S - - - - - Output IP3 at 100MHz: 40d Bm Maximum Output Power: 16d Bm Bandwidth: LF to 540MHz Propagation Delay: 0.8ns Maximum Gain: 27d B Gain Control Range: 22.5d B Gain Control Step: 1.5d B Gain Control Settling Time: 500ns Noise Figure: 8.6d B at 100MHz (Max Gain) Output Noise Floor: - 138d Bm/Hz (Max Gain) Reverse Isolation: - 92d B Single Supply: 4.75V to 5.25V Shutdown Mode Enable/Disable Time: 1µs Differential I/O Interface 20-Lead TSSOP Package The LT®5524 is a programmable gain amplifier (PGA) with bandwidth extending from low frequency (LF) to 540MHz. It consists of a digitally controlled variable attenuator, followed by a high linearity amplifier. 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 LT5524’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 LT5524 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. Patents Pending. High Linearity ADC Driver IF Sampling Receivers VGA IF Power Amplifier 50Ω Driver Instrumentation Applications TYPICAL APPLICATIO Output IP3 vs Frequency, ROUT = 200Ω 5V CHOKE 0.1µF RF INPUT LO IF BPF IF AMP 0.1µF 4 LINES LT5524 CHOKE 0.1µF 51 48 OIP3 (d Bm) 45 MAX GAIN 42 39 36 33 30 0 50 100 FREQUENCY (MHz) 5524 TA02 100Ω 0.1µF GAIN CONTROL 5524...