آر اف (فرکانس رادیویی) و بی‌سیم آی سی‌ فرستنده‌گیرنده آر اف

Product Attributes

Introduction

The AD6190 900 MHz RF Transceiver provides a complete RF/IF section for systems operating in the 902 MHz–928 MHz license-free ISM band. The high level of integration allows several dozen discrete components to be replaced. It is ideally suited for use in cordless telephone and wireless data applications. The receiver section includes a Low Noise Amplifier (LNA). The LNA’s output drives an image-reject mixer; the mixer’s output optimized for 10.7 MHz is filtered and processed by the limiting IF amplifier. The transmit section accepts a modulated 10.7 MHz IF input, and uses an image-reject upconverter to mix the signal up to the 902 MHz–928 MHz RF carrier frequency while suppressing the unwanted image and LO components. The RF output is raised to a nominal 0.5 milliwatt (-3 dBm) output level. This output can be used directly or can drive an external power amplifier to higher levels. The on-chip VCO operates at 2× the local oscillator frequency. This reduces oscillator pulling due to strong interferers in-band or transmitter leakage. An on-chip 64/65 prescaler allows the VCO to be controlled by a low cost 15 MHz CMOS synthesizer. An on-chip low dropout regulator minimizes VCO pushing. The transmit section, receive section, or both, can be placed in a low current SLEEP mode when not in use. The AD6190 900 MHz RF transceiver is packaged in a 28-lead SSOP package.

The AD6190 is a complete RF/IF transceiver for operation in the 902 MHz - 928 MHz Industrial, Scientific and Medical (“ISM”) frequency band. Together with a suitable spreadspectrum controller, the AD6190 can be used to design a spread-spectrum system compliant with FCC “Part 15° (47CFR15.247) regulations. The AD6190 is a fully compatible companion chip to the Zilog Z87L00 “ZPhone” frequencyhopping spread-spectrum controller. The AD6190 includes a receive path of LNA, image-reject mixer, IF amplifier and limiter amplifier with RSSI. The transmit path accepts a 10.7 MHz IF input signal, and uses imagereject upconversion to the 902 MHz - 928 MHz band. Frequency control is achieved using an on-chip VCO and dual-modulus prescaler connected to an inexpensive low frequency PLL for channel selection and frequency hopping. Additionally, an on-chip voltage regulator stabilizes the VCO to prevent LO pushing due to power supply variations.

Features

• Complete 900 MHz RF Transceiver LNA Receive Mixer Transmit Mixer Driver Amplifier VCO Prescaler Limiter Amplifier with RSSI
• On-Chip Low Dropout Regulator
• Independent Sleep Modes for TX, RX
• 28-Lead SSOP Package

Applications

• 902 MHz–928 MHz ISM Band Cordless Telephones
• 902 MHz–928 MHz ISM Band Wireless Data Systems