Low Power Dual RF/IF Integer-N PLL

The ADF4217L Synthesizer IC when combined with a VCO and loop filter forms a complete phased locked loop (PLL). This solution from ADI creates state-of-the-art LO's (local oscillator) for the upconversion and downconversion of RF signals in Wireless applications. The PLL 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 ADF4217L and ADF4218L are low current consumption improvements on the released ADF4217 and ADF4218 and are available in TSSOP and MLF (LFCSP). The ADF4219L is a Phase Noise upgrade & pin compatible to the LMX2370 from National Semiconductor and is available in both TSSOP and MLF (Cason).

Sales Collateral:

* Full data sheet with performance graphs.

* Press release, February 2002.

* Circuit simulation included in ADISimPLL, released February 2002.

* Evaluation board and software available.

* Low Phase Noise

* Separate Vp allows extended tuning range

* 2.6V to 3.3V single Power supply

* TSSOP and chip scale package available

* Selectable dual modulus prescaler values

* Programmable charge pump currents

* Low current consumption (7.0mA

total Idd)

* 1.8V Logic compatibility

* ADF4219L is a Phase noise upgrade to LMX2370