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LT5554 - Broadband Ultra Low Distortion 7-Bit Digitally Controlled VGA

General Description

The LT®5554 is a 7-bit digitally controlled programmable gain (PG) amplifier with 16dB gain control range.

It consists of a 50Ω input variable attenuator, followed by a high linearity variable transconductance amplifier.

Key Features

  • n 1GHz Bandwidth at all Gains n 48dBm OIP3 at 200MHz, 2VP-P into 50Ω, ROUT = 100Ω n.
  • 88dBc IMD3 at 200MHz, 2VP-P into 50Ω, ROUT = 100Ω n 1.4nV/√Hz Input-Referred-Noise (RTI) n 20dBm Output P1dB at 70MHz, ROUT = 130Ω n 2dB to 18dB Gain Range (ROUT = 50Ω) n 0.125dB Gain Step Size n 30ps Group Delay Variation n 5ns Fast Gain Settling Time n 5ns Fast Overdrive Recovery n.
  • 80dB Reverse Isolation.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FEATURES n 1GHz Bandwidth at all Gains n 48dBm OIP3 at 200MHz, 2VP-P into 50Ω, ROUT = 100Ω n –88dBc IMD3 at 200MHz, 2VP-P into 50Ω, ROUT = 100Ω n 1.4nV/√Hz Input-Referred-Noise (RTI) n 20dBm Output P1dB at 70MHz, ROUT = 130Ω n 2dB to 18dB Gain Range (ROUT = 50Ω) n 0.125dB Gain Step Size n 30ps Group Delay Variation n 5ns Fast Gain Settling Time n 5ns Fast Overdrive Recovery n –80dB Reverse Isolation APPLICATIONS n Differential ADC Driver n IF Sampling Receivers n VGA IF Power Amplifier n 50Ω Driver n Instrumentation L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.