LT5554 Datasheet - Linear

LT5554 Broadband Ultra Low Distortion 7-Bit Digitally Controlled VGA

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. The coarse 4dB input attenuator step is implemented via 2-bits of digital control.

LT5554 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

LT5554-Linear.pdf