LT5568 700MHz 至 1050MHz 高线性度直接正交调制器
The LT5568 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, WCDMA, 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 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
- Frequency Range: 700MHz to 1050MHz
- High OIP3: +22.9dBm at 850MHz
- Low Output Noise Floor at 5MHz Offset:
No RF: –160.3dBm/Hz
POUT = 4dBm: –154dBm/Hz
- 3-Ch CDMA2000 ACPR: –71.4dBc at 850MHz
- 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 850MHz
- High Image Rejection: –46dBc at 850MHz
- 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 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 数据手册及相关资料下载
- 数据手册 (英文) : LT5568 - 700MHz - 1050MHz 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 WCDMA ACPR, AltCPR and Noise Measurements.PDF
- 可靠性数据 : R409 Reliability Data .PDF
