TDA20142数据手册恩XP中文资料规格书

描述 Description

Overview Archived content is no longer updated and is made available for historical reference only.
TDA20142 is a general-purpose 8PSK satellite tuner that addresses the stringentrequirements of both operator and Free To Air (FTA) applications. It includes an integratedhigh-sensitivity Low Noise Amplifier (LNA) and a large dynamic range. The device alsoincludes a built-in RF Loop-Through (LPT).
To address FTA applications, the TDA20142’s built-in high-sensitivity LNA providesexceptional Noise Figure (NF) without the need for any external amplification. However,unlike many competitive FTA tuners, the TDA20142’s unique architecture allows it toachieve this NF for low-power signals without sacrificing linearity (IIP3, IIP2) when totalpower is high. This characteristic makes the TDA20142 ideal for operator applications.The LNA also includes multiple settings to allow power reduction when higher linearity isnot required.
To achieve 8PSK compliance, the tuner employs a fractional PLL that provides excellentphase noise while enabling fine step size without adversely affecting lock time. Additionalfeatures include a built-in auto-tuning function, a single-ended RF input and a bufferedversion of the crystal clock with optional dividers that is made available to drivecompanion ICs.
The device’s flexible LPT includes a buffer and an attenuator with four settings. Thisallows flexibility when connected in cascade with a second satellite tuner. Good reverseisolation assures that interaction between the two tuners connected via the LPT path doesnot affect the desired signal.

特性 Features

Integrated high-sensitivity LNA
Excellent noise figure
Very low phase noise
Excellent linearity
Wide dynamic range
LPT output
Integrated RF power detector
Built-in auto tuning machine eliminates the need for software calibration
Buffered clock output
Supports 8PSK and QPSK modulation formats
Supported symbol rates: 1 Msps to 60 Msps
RF input frequency: 950 MHz to 2150 MHz
Single 3.3 V power supply
Lead-free 5 mm  5 mm 28-pin QFN package

应用 Application

Operator-based 8PSK Set-Top Boxes (STBs)
FTA STBs
Satellite enabled PC cards
Televisions with integrated satellite receivers