آر اف (فرکانس رادیویی) و بی‌سیم مدولاتور آر اف

Product Attributes

Introduction

The AD8346 is a silicon RFIC I/Q modulator for use from 0.8 GHz to 2.5 GHz. Its excellent phase accuracy and amplitude balance allow high performance direct modulation to RF. This quadrature modulator can be used as the transmit modulator in digital systems such as PCS, DCS, GSM, CDMA, and ISM transceivers. The baseband quadrature inputs are directly modulated by the LO signal to produce various QPSK and QAM formats at the RF output. Additionally, 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. The AD8346 comes in a 16-lead TSSOP package, measuring 6.5 mmx5.1 mmx1.1 mm. It is specified to operate over a -40℃ to +85℃ temperature range and a 2.7 V to 5.5 V supply voltage range. The device is fabricated on Analog Devices’ high performance 25 GHz bipolar silicon process.

Features

• High accuracy
• 1 degree rms quadrature error @ 1.9 GHz
• 0.2 dB I/Q amplitude balance @ 1.9 GHz
• Broad frequency range: 0.8 GHz to 2.5 GHz
• Sideband suppression: −46 dBc @ 0.8 GHz
• Sideband suppression: −36 dBc @ 1.9 GHz
• Modulation bandwidth: dc to 70 MHz
• 0 dBm output compression level @ 0.8 GHz
• Noise floor: −147 dBm/Hz
• Single 2.7 V to 5.5 V supply
• Quiescent operating current: 45 mA
• Standby current: 1 μA
• 16-lead TSSOP

Applications

• Digital and spread spectrum communication systems
• Cellular/PCS/ISM transceivers
• Wireless LAN/wireless local loop
• QPSK/GMSK/QAM modulators
• Single-sideband (SSB) modulators
• Frequency synthesizers
• Image reject mixer