Introduction

STVVGLNA

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Doc ID 018892 Rev 1

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Introduction

The STVVGLNA is a front-stage amplifier designed for set-top boxes. It has high input

power dynamic range to allow the optimization of sensitivity and linearity requirements.

The STVVGLNA has several operating modes suitable for different signal conditions:

●

automatic wide-band mode, internal AGC (the default mode)

●

semi-automatic wide-band mode, internal AGC

●

fixed gain mode, no AGC

●

variable gain with external AGC (driven by demodulator, for example)

The STVVGLNA also provides a RF-signal-level indication which may be interrogated via

At power-on, the STVVGLNA starts in automatic and autonomous AGC mode so that it can

operate in satellite set-top boxes, LNBs or SMATV accessories without any software

assistance.

Features

Benefits

Active amplitude compensation and

balanced/differential operation.

Simplified RF layout and increased robustness to

interference.

Four AGC/Gain programmable operating

modes.

Flexible AGC strategy.

Programmable via I2C bus.

The device can be µP controlled.

Wide range of input frequencies.

Applications range from satellite receivers down to

VHF antenna amplifiers.

Low component count plus tiny package with

exposed pad.

Small BOM and minimal use of PCB area.

Pre programmed

automatic wide-band

No micro processor is required if the STVVGLNA is

to be used in default mode.