LT5568-2 GSM/EDGE Optimized, High linearity Direct Quadrature Modulator
The LT®5568-2 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 that operate in the 850MHz to 965MHz band. It may be configured as an image reject upconverting 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
产品特点 Features
- Optimized Image Rejection for 850MHz to 965MHz
- High OIP3: +22.9dBm at 900MHz
- Low Output Noise Floor at 5MHz Offset:
No RF: –159.4dBm/Hz
POUT = 4dBm: –153dBm/Hz
- 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: –43dBm at 900MHz
- High Image Rejection: –52dBc at 900MHz
- 16-Lead 4mm × 4mm QFN Package
|
应用
- Infrastructure Tx for Cellular Bands
- Image Reject Up-Converters for Cellular Bands
- Low-Noise Variable Phase-Shifter for 700MHz to 1050MHz Local Oscillator Signals
- RFID Reader
典型应用图
参数
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LT5568-2 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) * |
| LT5568-2EUF#PBF |
QFN |
17 |
E |
$7.60 |
$5.35 |
| LT5568-2EUF#TRPBF |
QFN |
17 |
E |
|
$5.45 |
| LT5568EUF#PBF |
QFN |
16 |
E |
$7.60 |
$5.35 |
| LT5568EUF#TRPBF |
QFN |
16 |
E |
|
$5.45 |
LT5568-2 数据手册及相关资料下载
- 数据手册 (英文) : LT5568-2 - GSM/EDGE Optimized, 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 - LT5568-2 WCDMA ACPR, AltCPR and Noise Measurements.PDF
- 可靠性数据 : R409 Reliability Data .PDF
