ADF4212LBCPZ-RL

锁相环 - PLL Dual Power Freq Synthesizer

Product Details

The ADF4212L is a dual frequency synthesizer that can be used to implement local oscillators LO in the up-conversion and down-conversion sections of wireless receivers and transmitters. It can provide the LO for both the RF and IF sections. It consists of a low noise digital phase frequency detector PFD, 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 12-bit counters, in conjunction with the dual modulus prescaler P/P + 1, implement an N divider N = BP + A. In addition, the 15-bit reference counter R Counter, allows selectable REFIN frequencies at the PFD input. A complete phase-locked loop PLL can be implemented if the synthesizer is used with external loop filters and voltage controlled oscillators VCOs.

Control of all the on-chip registers is via a simple 3-wire interface with 1.8 V compatibility. The devices operate with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.

**Applications**

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Wireless handsets GSM, PCS, DCS, DSC1800, CDMA, WCDMA

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Base stations for wireless Radio GSM, PCS, DCS, CDMA, WCDMA

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Wireless LANS

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Cable TV tuners CATV

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Communications test equipment

### Features and Benefits

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IDD total, 7.5 mA

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Bandwidth RF/IF, 2.4 GHz/1.0 GHz

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2.7 V to 3.3 V power supply

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Separate VP allows extended tuning voltage

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Programmable dual modulus prescaler RF and IF: 8/9, 16/17, 32/33, 64/65

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Programmable charge pump currents

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3-wire serial interface

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Analog and digital lock detect

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Fastlock mode

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Power-down mode

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20-lead TSSOP and 20-lead LFCSP packages