AD6190 Datasheet | Analog Devices

FEATURES plete 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 GENERAL DESCRIPTION 900 MHz RF Transceiver AD6190 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 ponents. The RF output is raised to a nominal 0.5 milliwatt (- 3 d Bm) 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 900 MHz RF Transceiver is part of the Analog Devices/Zilog “A-to-Z Phone” Spread-Spectrum System for cordless telephone and data munications applications. Contact Zilog directly at (408) 370-8000 for more information on the Z87000 series baseband controller chips. The AD6190 900 MHz RF Transceiver provides a plete 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 ponents to be replaced. It is ideally suited for use in cordless telephone and...