DESCRIPTION
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 22.5dB range with 1.5dB step resolution. An on-chip power supply regulator/filter helps isolate the amplifier signal path from external noise sources.

FEATURES
■ Output IP3 at 100MHz: 40dBm
■ Maximum Output Power: 16dBm
■ Bandwidth: LF to 540MHz
■ Propagation Delay: 0.8ns
■ Maximum Gain: 27dB
■ Gain Control Range: 22.5dB
■ Gain Control Step: 1.5dB
■ Gain Control Settling Time: 500ns
■ Noise Figure: 8.6dB at 100MHz (Max Gain)
■ Output Noise Floor: –138dBm/Hz (Max Gain)
■ Reverse Isolation: –92dB
■ Single Supply: 4.75V to 5.25V
■ Shutdown Mode
■ Enable/Disable Time: 1µs
■ Differential I/O Interface
■ 20-Lead TSSOP Package

APPLICATIONS
■ High Linearity ADC Driver
■ IF Sampling Receivers
■ VGA IF Power Amplifier
■ 50Ω Driver
■ Instrumentation Applications