آر اف (فرکانس رادیویی) و بی‌سیم مدولاتور آر اف

Product Attributes

Introduction

The AD8345 is a silicon RFIC quadrature modulator, designed for use from 140 MHz to 1000 MHz. Its excellent phase accuracy and amplitude balance enable the high performance direct modulation of an IF carrier. The AD8345 accurately splits the external LO signal into two quadrature components through the polyphase phase splitter network. The I and Q LO components are mixed with the baseband I and Q differential input signals. Finally, the outputs of the two mixers are combined in the output stage to provide a single-ended 50 Ω drive at VOUT.

Features

• 140 MHz to 1000 MHz operating frequency
• +2.5 dBm P1dB @ 800 MHz
• −155 dBm/Hz noise floor
• 0.5 degree RMS phase error (IS95)
• 0.2 dB amplitude balance
• Single 2.7 V to 5.5 V supply
• Pin-compatible with AD8346 and AD8349
• 16-lead TSSOP_EP package

Applications

• Cellular communication systems
• W-CDMA/CDMA/GSM/PCS/ISM transceivers
• Fixed broadband access systems LMDS/MMDS
• Wireless LAN
• Wireless local loop
• Digital TV/CATV modulators
• Single sideband upconverter
• The AD8345 modulator can be used as the IF transmit modulator in digital communication systems such as GSM and PCS transceivers.
• It can also directly modulate an LO signal to produce QPSK and various QAM formats for 900 MHz communication systems as well as digital TV and CATV systems.
• This quadrature modulator can be used with direct digital synthesizers in hybrid phase-locked loops to generate signals over a wide frequency range with millihertz resolution.