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RFFC2071ASQ Datasheet(PDF) 8 Page - RF Micro Devices |
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RFFC2071ASQ Datasheet(HTML) 8 Page - RF Micro Devices |
8 / 22 page 8 of 22 RFFC2071A/2A DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com. The RFFC2071A mixer layout and pin placement has been optimized for high mixer-to-mixer isolation of greater than 60dB. The mixers can be set up to operate in half duplex mode (1 mixer active) or full duplex mode (both mixers active). This selection is done via control of MODE and by setting the FULLD bit. When in full duplex mode, either PLL register bank can be used, the LO signal is routed to both mixers. Serial Interface All on-chip registers in the RFFC2071A and RFFC2072A are programmed using a proprietary 3-wire serial bus which supports both write and read operations. Synthesizer programming, device configuration, and control are achieved through a mixture of hardware and software controls. Certain functions and operations require the use of hardware controls via the ENBL, MODE, and RESETB pins in addition to programming via the serial bus. Alternatively there is the option to control the chip completely via the serial bus. The serial data interface can be configured for 4-wire operation by setting the 4WIRE bit in the SDI_CTRL register high. Then pin 26 is used as the data out pin, and pin 32 is the serial data in pin. Mode FULLD Active PLL Register Bank Active Mixer LOW 0 1 1 HIGH 0 2 2 LOW 1 1 1 and 2 HIGH 1 2 1 and 2 |
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