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pic

LT5558EUF#PBF

廠商:
Linear
類(lèi)別:
I/Q調(diào)制器
包裝:
-
封裝:
QFN
無(wú)鉛情況/ROHS:
無(wú)鉛
描述:
600MHz to 1100MHz High Linearity ...

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  • 參數(shù)
  • 描述
  • 文檔
參數(shù) 數(shù)值
Features High Linearity Direct Quadrature Modulator
Min Frequency (MHz) 600
Max Frequency (MHz) 1100
OIP3 (dB) 22.4
Noise Floor (dB) -158
LO Leakage (dB) -43.7
Isupply (mA) 108 (135)
Packages QFN-16
Applications Infrastructure TX for Cellular and ISM Bands
Description 600MHz to 1100MHz High Linearity Direct Quadrature Modulator
Function Quadrature Modulator
Image Supression (dB)
Supply Voltage Range 4.5V to 5.25V
Extended Temp E
Featured no
Date Added 1984-01-01
Price 1k * $5.35 (LT5558EUF)
New no

特點(diǎn)
Direct Conversion from Baseband to RF
High OIP3: + 22.4dBm at 900MHz
Low Output Noise Floor at 20MHz Offset: ??No RF: –158dBm/Hz ??P OUT = 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

典型應(yīng)用

典型應(yīng)用

描述
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 con? 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.

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