LT5558 - LT5558是600MHz to 1100MHz High Linearity Direct Quadrature Modulator

LT5558是LINEAR凌力尔特公司的一款I/Q 调制器产品，LT5558是LT5558是600MHz to 1100MHz High Linearity Direct Quadrature Modulator，本站介绍了LT5558的封装应用图解、特点和优点、功能等，并给出了与LT5558相关的LINEAR元器件型号供参考。

LT5558 - LT5558是600MHz to 1100MHz High Linearity Direct Quadrature Modulator - I/Q 调制器 - RF和无线 - 凌力尔特

LT5558 - 600MHz to 1100MHz High Linearity Direct Quadrature Modulator

LT5558 - 600MHz to 1100MHz High Linearity Direct Quadrature Modulator - Linear Technology（凌力尔特）

功能描述

The LT5558 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 GSM, EDGE, CDMA, CDMA2000, 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 high impedance I/Q baseband inputs consist of voltage-to-current converters that in turn drive doublebalanced 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 balanced I and Q baseband input ports are intended for DC coupling from a source with a common-mode voltage level of about 2.1V. The LO path consists of an LO buffer with single-ended input, and precision quadrature generators which produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V.

特点

Direct Conversion from Baseband to RF

High OIP3: + 22.4dBm at 900MHz

Low Output Noise Floor at 20MHz Offset:No RF: –158dBm/HzPOUT = 4dBm: –152.7dBm/Hz

Low Carrier Leakage: –43.7dBm at 900MHz

High Image Rejection: –49dBc at 900MHz

3 Channel CDMA2000 ACPR: –70.4dBc at 900MHz

Integrated LO Buffer and LO Quadrature Phase Generator

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

High Impedance Interface to Baseband Inputs with 2.1V Common Mode Voltage

16-Lead QFN 4mm × 4mm Package

应用