LT5518 1.5GHz2.4GHz High linearity Direct Quadrature Modulator
The LT®5518 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 configured as an image reject up-converting 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 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 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 that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V
产品特点 Features
- High Input Impedance Version of the LT5528
- Direct Conversion to 1.5GHz - 2.4GHz
- High OIP3: 22.8dBm at 2GHz
- Low Output Noise Floor at 20MHz Offset:
No RF: -158.2dBm/Hz
POUT = 4dBm: -152.5dBm/Hz
- 4-Ch W-CDMA ACPR: -64dBc at 2.14GHz
- Integrated LO Buffer and LO Quadrature Phase Generator
- 50Ω AC-Coupled Single-Ended LO and RF Ports
- Low Carrier Leakage: -49dBm at 2GHz
- High Image Rejection: 40dB at 2GHz
- 16-Lead QFN 4mm × 4mm Package
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应用
- Infrastructure Tx for DCS, PCS and UMTS Bands
- Image Reject Up-Converters for DCS, PCS and UMTS Bands
- Low Noise Variable Phase-Shifter for 1.5GHz to 2.4GHz Local Oscillator Signals
典型应用图
参数
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LT5518 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LT5518EUF |
QFN |
16 |
E |
$7.05 |
$4.95 |
| LT5518EUF#PBF |
QFN |
16 |
E |
$7.05 |
$4.95 |
| LT5518EUF#TR |
QFN |
16 |
E |
|
$5.05 |
| LT5518EUF#TRPBF |
QFN |
16 |
E |
|
$5.05 |
LT5518 数据手册及相关资料下载
- 数据手册 (英文) : LT5518 - 1.5GHz - 2.4GHz High linearity Direct Quadrature Modulator.PDF
- 应用指南 (英文) : AN102 - Measuring Phase and Delay Errors Accurately in I/Q Modulators.PDF
- 应用指南 (英文) : AN109 - Interfacing RF I/Q Modulators with Popular D/A Converters.PDF
- 应用指南 (英文) : AN99 - LT5528 WCDMA ACPR, AltCPR and Noise Measurements.PDF
- 可靠性数据 : R409 Reliability Data .PDF
