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ADRF6701 Datasheet(PDF) 1 Page - Analog Devices |
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ADRF6701 Datasheet(HTML) 1 Page - Analog Devices |
1 / 36 page 2050 MHz to 3000 MHz Quadrature Modulator with 2500 MHz to 2900 MHz Frac-N PLL and Integrated VCO Data Sheet ADRF6704 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 modulator with integrated fractional-N PLL Output frequency range: 2050 MHz to 3000 MHz Internal LO frequency range: 2500 MHz to 2900 MHz Output P1dB: 12.1 dBm @ 2700 MHz Output IP3: 27.2 dBm @ 2700 MHz Noise floor: −158.3 dBm/Hz @ 2700 MHz Baseband bandwidth: 750 MHz (3 dB) SPI serial interface for PLL programming Integrated LDOs and LO buffer Power supply: 5 V/226 mA 40-lead 6 mm × 6 mm LFCSP APPLICATIONS Cellular communications systems GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA, LTE Broadband wireless access systems Satellite modems GENERAL DESCRIPTION The ADRF6704 provides a quadrature modulator and synthesizer solution within a small 6 mm × 6 mm footprint while requiring minimal external components. The ADRF6704 is designed for RF outputs from 2050 MHz to 3000 MHz. The low phase noise VCO and high performance quadrature modulator make the ADRF6704 suitable for next generation communication systems requiring high signal dynamic range and linearity. The integration of the IQ modulator, PLL, and VCO provides for significant board savings and reduces the BOM and design complexity. The integrated fractional-N PLL/synthesizer generates a 2× fLO input to the IQ modulator. The phase detector together with an external loop filter is used to control the VCO output. The VCO output is applied to a quadrature divider. To reduce spurious components, a sigma-delta (Σ-Δ) modulator controls the programmable PLL divider. The IQ modulator has wideband differential I and Q inputs, which support baseband as well as complex IF architectures. The single-ended modulator output is designed to drive a 50 Ω load impedance and can be disabled. The ADRF6704 is fabricated using an advanced silicon- germanium BiCMOS process. It is available in a 40-lead, exposed-paddle, Pb-free, 6 mm × 6 mm LFCSP package. Performance is specified from −40°C to +85°C. A lead-free evaluation board is available. Table 1. Part No. Internal LO Range IQ Modulator ±3 dB RF Output Range ADRF6701 750 MHz 400 MHz 1150 MHz 1250 MHz ADRF6702 1550 MHz 1200 MHz 2150 MHz 2400 MHz ADRF6703 2100 MHz 1550 MHz 2600 MHz 2650 MHz ADRF6704 2500 MHz 2050 MHz 2900 MHz 3000 MHz FUNCTIONAL BLOCK DIAGRAM MUX RSET CP VTUNE LOSEL LON LOP QN 2:1 MUX VCO CORE QP TEMP SENSOR DECL3 DECL2 DECL1 ENOP BUFFER BUFFER RFOUT NC NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. VCC1 VCC2 VCC3 VCC4 VCC5 VCC6 – + CHARGE PUMP 250µA, 500µA (DEFAULT), 750µA, 1000µA PRESCALER ÷2 LE CLK SPI INTERFACE DATA MUXOUT ÷2 0/90 REFIN GND ADRF6704 29 VCC7 34 26 16 39 3 5 4 8 6 14 13 12 38 37 36 7 11 15 20 21 23 24 25 28 30 31 35 2 9 40 IP IN 27 17 10 1 22 PHASE FREQUENCY DETECTOR THIRD-ORDER FRACTIONAL INTERPOLATOR FRACTION REG MODULUS INTEGER REG N COUNTER 21 TO 123 ×2 ÷2 ÷4 DIVIDER ÷2 18 19 32 33 Figure 1. |
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