LT5568是700MHz 至 1050MHz 高线性度直接正交调制器

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LT5568 - LT5568是700MHz 至 1050MHz 高线性度直接正交调制器

LT5568是Linear公司的一款I/Q 调制器产品，LT5568是700MHz 至 1050MHz 高线性度直接正交调制器，本站介绍了LT5568的封装应用图解、特点和优点、功能等，并给出了与LT5568相关的凌力尔特元器件型号供参考。

LT5568 - 700MHz 至 1050MHz 高线性度直接正交调制器

LT5568 - 700MHz 至 1050MHz 高线性度直接正交调制器 - Linear Technology（凌力尔特）

功能描述

The LT5568 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation of an RF signal using differential baseband I and Q signals. It supports PHS, GSM, EDGE, TD-SCDMA, CDMA, CDMA2000, WCDMA, and other systems. It may also be confi gured as an image reject upconverting mixer, by applying 90° phase-shifted signals to the I and Q inputs. The I/Q baseband inputs consist of voltage-to-current converters that in turn drive double-balanced mixers. The outputs of these mixers are summed and applied to an on-chip RF transformer, which converts the differential mixer signals to a 50Ω single-ended output. The four balanced I and Q baseband input ports are intended for DC coupling from a source with a common mode voltage level of about 0.5V. The LO path consists of an LO buffer with single-ended input, and precision quadrature generators that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V.

特点

Frequency Range: 700MHz to 1050MHz

High OIP3: +22.9dBm at 850MHz

Low Output Noise Floor at 5MHz Offset:?No RF: –160.3dBm/Hz?POUT = 4dBm: –154dBm/Hz

3-Ch CDMA2000 ACPR: –71.4dBc at 850MHz

Integrated LO Buffer and LO Quadrature Phase Generator

50Ω AC-Coupled Single-Ended LO and RF Ports

50Ω DC Interface to Baseband Inputs

Low Carrier Leakage: –43dBm at 850MHz

High Image Rejection: –46dBc at 850MHz

16-Lead 4mm × 4mm QFN Package

应用