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ADRF6801 Datenblatt(PDF) 1 Page - Analog Devices |
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ADRF6801 Datenblatt(HTML) 1 Page - Analog Devices |
1 / 36 page 750 MHz to 1150 MHz Quadrature Demodulator with Fractional-N PLL and VCO ADRF6801 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 ©2011 Analog Devices, Inc. All rights reserved. FEATURES IQ demodulator with integrated fractional-N PLL LO frequency range: 750 MHz to 1150 MHz Input P1dB: 12.5 dBm Input IP3: 25 dBm Noise figure (DSB): 14.3 dB Voltage conversion gain: 5.1 dB Quadrature demodulation accuracy Phase accuracy: 0.3° Amplitude accuracy: 0.05 dB Baseband demodulation: 275 MHz, 3 dB bandwidth SPI serial interface for PLL programming 40-lead, 6 mm × 6 mm LFCSP APPLICATIONS QAM/QPSK RF/IF demodulators Cellular W-CDMA/CDMA/CDMA2000 Microwave point-to-(multi)point radios Broadband wireless and WiMAX GENERAL DESCRIPTION The ADRF6801 is a high dynamic range IQ demodulator with integrated PLL and VCO. The fractional-N PLL/synthesizer generates a frequency in the range of 3.0 GHz to 4.6 GHz. A divide-by-4 quadrature divider divides the output frequency of the VCO down to the required local oscillator (LO) frequency to drive the mixers in quadrature. Additionally, an output buffer can be enabled that generates an fVCO/2 signal for external use. The PLL reference input is supported from 10 MHz to 160 MHz. The phase detector output controls a charge pump whose output is integrated in an off-chip loop filter. The loop filter output is then applied to an integrated VCO. The IQ demodulator mixes the differential RF input with the complex LO derived from the quadrature divider. The differential I and Q output paths have excellent quadrature accuracy and can handle baseband signaling or complex IF up to 120 MHz. The ADRF6801 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, exposed-paddle, RoHS-compliant, 6 mm × 6 mm LFCSP package. Performance is specified over the −40°C to +85°C temperature range. FUNCTIONAL BLOCK DIAGRAM MUX RSET GND LON LOP MUX TEMP SENSOR GND VCCBB GND VCCLO BUFFER BUFFER QBBN VCCLO – + CHARGE PUMP 250µA, 500µA (DEFAULT), 750µA, 1000µA PRESCALER ÷2 VCO LDO 2.5V LDO LE CLK SPI INTERFACE DATA MUXOUT REFIN ADRF6801 34 GND LOSEL 35 19 QBBP 18 17 16 DECL1 40 VTUNE 39 DECL2 VCC2 9 10 5 DECL3 2 VCC1 1 8 6 GND 7 14 GND 15 13 12 38 GND 11 37 36 GND 31 IBBN IBBP 32 33 28 VCCRF 27 RFIN 26 GNDRF 25 GND 24 GND 23 VCCBB 22 GND GND 21 20 29 30 PHASE FREQUENCY DETECTOR THIRD-ORDER FRACTIONAL INTERPOLATOR FRACTION REG MODULUS INTEGER REG N COUNTER GND 4 CPOUT 3 ×2 ÷2 ÷4 DIVIDER ÷1 OR ÷2 VCO CORE BUFFER CTRL QUAD ÷2 3.3V LDO Figure 1. |
Ähnliche Teilenummer - ADRF6801 |
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Ähnliche Beschreibung - ADRF6801 |
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