Datenblatt-Suchmaschine für elektronische Bauteile |
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AD6411AST Datenblatt(PDF) 1 Page - Analog Devices |
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AD6411AST Datenblatt(HTML) 1 Page - Analog Devices |
1 / 11 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD6411 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 DECT RF Transceiver FUNCTIONAL BLOCK DIAGRAM LNA PA RSSI RX DATA TX DATA AD6411 PLL DEMODULATOR PLL VCO CONTROL INTERFACE PFD FEATURES Fully Compliant with DECT Specifications Single IC DECT Radio Integrated UHF VCO (External Resonator) Integrated Synthesizer Supporting Extended Frequency Allocation Built-In Supply Regulation Direct VCO Modulation for DECT Transmit Path PLL-Based Demodulator Use with Low Cost Plastic Packaged SAW Filters Ultralow Power Design Operates from +3.0 V to +5.5 V Battery User-Selectable Power-Down Modes Small 48-Lead LQFP Package APPLICATIONS DECT Cordless Telephones DECT-Based Wireless Local Loop Systems DECT-Based Wireless Data Systems DESCRIPTION The AD6411 provides the complete transmit and receive RF signal processing necessary to implement a digital wireless transceiver based on the Digital Enhanced Cordless Telecom- munications (DECT) standard. The AD6411’s receive signal path consists of a mixer, IF ampli- fiers and PLL demodulator. The low noise, high intercept mixer is a development of the doubly-balanced Gilbert-Cell type. It has a nominal –16 dBm input-referred 1 dB compression point and a –8 dBm input referred third-order intercept. The limiter amplifier provides sufficient gain to drive the PLL demodulator, which provides selectable analog or sliced outputs. The RSSI output provides a voltage proportional to the receive signal strength. It measures nearly 100 dB IF signal strength range with 14 mV/dB gain scaling. The transmit path accepts baseband data, which is filtered and applied to the VCO directly. The VCO operates at half the RF carrier frequency, and is doubled to avoid pulling due to leakage from the output. An on-chip PLL frequency synthesizer provides channel selec- tion. Operating modes are selected either through a serial bus or asynchronous control pins. This allows compatibility with most of the available DECT baseband controller ASICs. The AD6411 is packaged in a 48-lead LQFP. |
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