Features and Benefits
- 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
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.
- 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
Product Lifecycle Last Time Buy
All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.
Evaluation Kits (1)
DC729A: Demo Board for the LT5528 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator.
Documentation & Resources
R409 Reliability Data3/23/201823 K
AN102 - Measuring Phase and Delay Errors Accurately in I/Q Modulators10/15/2007181K
AN109 - Interfacing RF I/Q Modulators with Popular D/A Converters10/15/2007147K
AN99 - LT5528 WCDMA ACPR, AltCPR and Noise Measurements8/20/200778K
DC729A - Demo Manual9/24/2009149K
DN375 - LT5528 WCDMA ACPR and AltCPR Measurements8/6/201489K
Tools & Simulations
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
LT5528 Companion Parts
Recommended Suggested Oscillator
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT5528EUF#PBF||Material Declaration||Reliability Data||16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LT5528EUF#TRPBF||Material Declaration||Reliability Data||16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R409 Reliability Data|
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