The LT5524 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 22.5dB range with 1.5dB step resolution. An on-chip power supply regulator/filter helps isolate the amplifier signal path from external noise sources.The LT5524’s open-loop architecture offers stable operation for any practical load conditions, including peaking-free 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.ApplicationsHigh Linearity ADC DriverIF Sampling ReceiversVGA IF Power Amplifier50Ω DriverInstrumentation Applications