ADF4217
ADF4217
製造中止Dual, Integer-N 0.5 GHz/2.0 GHz PLL
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製品の詳細
- ADF4216: 550 MHz/1.2 GHz
- ADF4217: 550 MHz/2.0 GHz
- ADF4218: 550 MHz/2.5 GHz
- 2.7 V to 5.5 V Power Supply
- Selectable Charge Pump Currents
- Selectable Dual Modulus Prescaler
- IF: 8/9 or 16/17
- RF: 32/33 or 64/65
- 3-Wire Serial Interface
- Power-Down Mode
The ADF4216/ADF4217/ADF4218 is a dual frequency synthesizer which can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. They can provide the LO for both the RF and IF sections. They consist 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 (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. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizers are used with an external loop filter and VCO's (Voltage Controlled Oscillators)
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