ADF4108BCPZ-RL7

PLL频率合成器 PLL Frequency Synthesizer

Product Details

The ADF4108 frequency synthesizer can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. It 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 dual-modulus prescaler P/P + 1. The A 6-bit and B 13-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. A complete PLL phase-locked loop can be implemented if the synthesizer is used with an external loop filter and VCO voltage controlled oscillator. Its very high bandwidth 8GHz means that frequency doublers or prescalers can be eliminated in many high frequency systems, simplifying system architecture and reducing cost.

**Applications**

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Broadband wireless access

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Satellite systems

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Instrumentation

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Wireless LANs

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Base stations for wireless radio

### Features and Benefits

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8.0 GHz bandwidth

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3.2 V to 3.6 V power supply

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Separate charge pump supply VP allows extended tuning voltage in 3.3 V systems

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Programmable, dual-modulus prescaler 8/9, 16/17, 32/33, or 64/65

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Programmable charge pump currents

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Programmable antibacklash pulse width

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3-wire serial interface

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Analog and digital lock detect

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Hardware and software power-down mode

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Loop filter design possible with simPLL

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4 mm × 4 mm, 20-lead chip scale package