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Broadband digitally controlled VGA improves signal integrity performance

Milpitas, Calif.—Linear Technology has introduced the LT5554, a broadband digitally programmable gain IF amplifier, featuring a 48dBm OIP3 (output 3rd order intercept) at 200MHz.

Additionally, the amplifier has low noise, enabling high dynamic range performance in wireless communication receivers and signal processing systems. Its gain is digitally controlled from 2dB to 18dB by a 7-bit parallel word, producing the finest 0.125dB steps gain control granularity of any amplifier available. The amplifier settles in less than 5ns from a gain change, producing low glitch noise and supporting very fast and accurate AGC (Automatic Gain Control) performance.

Its output stage is capable of driving into 50Ω loads with low distortion and noise, enabling high spurious-free dynamic range performance in ADC systems.

Unique to the LT5554 is its OIP3 performance, which remains consistently high over a wide varying signal level range. In contrast, the closest competing product is limited to a narrow ±1dB signal level range, according to Linear.

Pricing: Starts at $4.40 each in 1,000-piece quantities.
Availability: Immediately from stock.
Datasheet: Click here.

Linear Technology, www.linear.com

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