LT5558 600MHz to 1100MHz High linearity Direct Quadrature Modulator
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
产品特点 Features
- Direct Conversion from Baseband to RF
- High OIP3: + 22.4dBm at 900MHz
- Low Output Noise Floor at 20MHz Offset:
No RF: –158dBm/Hz
POUT = 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
- RFID Single-Sideband Transmitters
- Infrastructure TX for Cellular and ISM Bands
- Image Reject Up-Converters for Cellular Bands
- Low-Noise Variable Phase-Shifter for 600MHz to 1100MHz Local Oscillator Signals
- Microwave Links
典型应用图
参数
 |
LT5558 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) * |
| LT5558EUF |
QFN |
16 |
E |
$7.05 |
$4.95 |
| LT5558EUF#PBF |
QFN |
16 |
E |
$7.05 |
$4.95 |
| LT5558EUF#TR |
QFN |
16 |
E |
|
$5.05 |
| LT5558EUF#TRPBF |
QFN |
16 |
E |
|
$5.05 |
LT5558 数据手册及相关资料下载
- 数据手册 (英文) : LT5558 - 600MHz to 1100MHz 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 - LT5558 WCDMA ACPR, AltCPR and Noise Measurements.PDF
- 可靠性数据 : R409 Reliability Data .PDF
