LT5528 - 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator

Features

  • Click Here For LT5528 Evaluation Kits
  • Direct Conversion to 1.5GHz to 2.4GHz
  • High OIP3: 21.8dBm at 2GHz
  • Low Output Noise Floor at 5MHz Offset:
    No RF: –159.3dBm/Hz
    POUT = 4dBm: –151.8dBm/Hz
  • 4-Ch W-CDMA ACPR: –66dBc at 2.14GHz
  • 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: –42dBm at 2GHz
  • High Image Rejection: 45dB at 2GHz
  • 16-Lead QFN 4mm × 4mm Package

Typical Application

LT5528
LT5528
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Description

The LT5528 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, W-CDMA and other systems. It may also be confi gured as an image reject up-converting 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.
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Packaging

QFN-16

LT5528
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT5528EUF QFN 16 E $7.05 $4.95 View
LT5528EUF#TR QFN 16 E   $5.05 View
LT5528EUF#TRPBF QFN 16 E   $5.05 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Evaluation Kits

Part Number Description Price
DC729A LT5528EUF 2GHz I/Q Modulator W/Current BB Interface $125.00
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Applications

  • Infrastructure Tx for DCS, PCS and UMTS Bands
  • Image Reject Up-Converters for PCS and UMTS Bands
  • Low-Noise Variable Phase-Shifter for 1.5GHz to 2.4GHz Local Oscillator Signals
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Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.

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