RF6001_1 RFMD [RF Micro Devices], RF6001_1 Datasheet - Page 15

• Manufacturer Part Number: RF6001_1
• Description: FRACTIONAL-N RF SYNTHESIZER WITH MODULATOR AND DIGITAL IF FILTER
• Manufacturer: RFMD [RF Micro Devices]

Functional Description
The RF6001 is a highly integrated receive and transmit processor intended for GSM/GPRS/EDGE
the following functionality: A high performance fractional-N PLL, baseband digital filtering with A/D's and D/A's for GSM VLIF
reception, two power transmit VCO's, GMSK modulator, PA ramp control DAC, and oscillator AFC control (reference oscillator cir-
cuitry). The fractional-N synthesizer section is multiplexed between transmit and receive functions, creating two sets of PLL
parameters. PLL10-PLL12 registers are intended to be used with the receive VCO on the RF2722 VLIF receiver IC and PLL20-
filter. The internal power VCOs are designed for use in all GSM transmit bands; VCO1 has a frequency range of 824MHz to
915MHz and VCO2 has a frequency range of 1710MHz to 1910MHz. Each VCO has a +3dBm minimum output power. Down
conversion from VLIF to baseband and all necessary baseband filtering for GSM/GPRS/EDGE reception is implemented digi-
tally, with programmable bandwidths ranging from 80kHz to 135kHz. The receive and transmit baseband interfaces can be
configured to work with standard analog differential I/Q signals or fully digital signals depending on SDI programming. The
GMSK modulator necessary for GSM signaling is also provided and feeds into the transmit Fractional-N synthesizer for direct
modulation of the VCO's. There are also two D/As (DAC1/DAC2) provided; DAC1 is configured to provide programmable ramp
control for the PA, and DAC2 for general-purpose DC tuning voltage applications. An automatic PA ramp control function is pro-
vided, which has programmable ramp shaping and timing.
Features of the part include:
• A DC to 2.5GHz fractional-N PLL having:
• Two integrated RF transmit power VCO's with min +3dBm output power capability to drive PA's
• PA control system with GPRS support
• Power control DAC for PA ramp generation and programmable DAC for DC tuning voltage operation
• Programmable digital or analog TX interface to fractional-N GMSK modulation system
• I and Q channel digital filtering with 12-bit A/D's and D/A's for VLIF reception
• I and Q digital SSI interface with option for analog interface
This Device contains technology licensed under certain patents.
Rev A3 DS050929
PLL21 registers are used with the two internal power VCO's on the RF6001. Each PLL configuration has a fully integrated loop
•Fine frequency resolution (typically 1.55Hz)
•Charge pump with programmable current capability and operation to 5V
•Integrated Loop Filters
•Low Prescaler drive level requirement
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
Application Information
Part of the POLARIS™ TOTAL RADIO™ Solution
RX
applications. It contains
RF6001
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