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Partname:ADF4208
Description:Dual RF PLL Frequency Synthesizers
Manufacturer:Analog Devices
Datasheet:PDF (206K).
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The ADF4206 family of dual frequency synthesizers can be used to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. Each synthesizer consists of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, programmable A and B counters and a dualmodulus prescaler (P/P + 1). The A (6-bit) and B (11-bit) counters, in conjunction with the dual modulus prescaler (P/P + 1), implement an N divider (N = BP + A). In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. The on-chip oscillator circuitry allows the reference input to be derived from crystal oscillators. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizers are used with an external loop filter and VCOs (Voltage Controlled Oscillators).

Click here to download ADF4208 Datasheet
Click here to download ADF4208 Datasheet
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