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ADSST-GPSRF01 Datasheet(PDF) 1 Page - Analog Devices |
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ADSST-GPSRF01 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page GPS RF Downconverter ADSST-GPSRF01 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©200 7 Analog Devices, Inc. All rights reserved. FEATURES Single chip GPS downconverter GPS L1 band C/A code (1575.42 MHz) receiver 2.7 V to 3.3 V power supply On-chip LNA On-chip PLL including complete VCO On-chip reference oscillator On-chip NCO for sampling clock Option to choose 6.144 MHz, or 6.552 MHz, or external sampling clock 60 dB AGC dynamic range SIGN and MAGN outputs Low power operation 55 mA Supports power-down mode APPLICATIONS Security applications Asset tracking Marine navigation Portable GPS receiver GENERAL DESCRIPTION The ADSST-GPSRF01 is a high performance, fully integrated, RF front-end chip for downconversion and amplification of GPS signals. It has been designed for L1 (1575.42 MHz), C/A GPS band receivers. The ADSST-GPSRF01 is a dual conversion, superheterodyne receiver with an on-chip low noise amplifier (LNA), local oscil- lator, two downconversion IF stages (at 24.52 MHz and 8.194 MHz, respectively), an automatic gain controlled amplifier (AGC), and a 2-bit analog-to-digital converter (ADC). Two selectable, fixed frequency sampling clocks from an on-chip NCO can be used for output sampling (6.144 MHz or 6.552 MHz). In addition, an external sampling clock can be used up to 32 MHz. The chip can be interfaced with any active/passive GPS antenna. FUNCTIONAL BLOCK DIAGRAM 1575.42MHz 24.52MHz 8.194MHz DIV 2 DIV 5 NCO PF DETECTOR CMDPHI 0:6.552MHz CMDPHI 1:6.144MHz 0 1 CMDCKADC CKIN CMDPHI QUARTZ ON/OFF 1575.42MHz 1550.9MHz MIXER1 LNA IF1 IF2 MIXER2 16.3252910MHz CH PUMP VCO ADC MAGN CKOUT SIGN DIV 2 DIV 4 DIV 19 Figure 1. |
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Descripción similar - ADSST-GPSRF01_15 |
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