ADF4157BCPZ-RL

Clock Generator 500MHz to 6GHz Input 20Pin LFCSP EP T/R

Product Details

The ADF4157 is a 6 GHz fractional-N frequency synthesizer with a 25-bit fixed modulus, allowing subhertz frequency resolution at 6 GHz. It consists of a low noise digital phase frequency detector PFD, a precision charge pump, and a programmable reference divider. There is a Σ-Δ based fractional interpolator to allow programmable fractional-N division. The INT and FRAC values define an overall N divider, N = INT + FRAC/225. The ADF4157 features cycle slip reduction circuitry, which leads to faster lock times without the need for modifications to the loop filter.

Control of all on-chip registers is via a simple 3-wire interface. The device operates 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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Satellite communications terminals, radar equipment

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Instrumentation equipment

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Personal mobile radio PMR

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Base stations for mobile radio

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Wireless handsets

### Features and Benefits

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RF bandwidth to 6 GHz

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25-bit fixed modulus allows subhertz frequency resolution

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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 charge pump currents

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3-wire serial interface

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Digital lock detect

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Power-down mode

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Pin compatible with the following frequency synthesizers: ADF4110/ADF4111/ADF4112/ADF4113 ADF4106/ADF4153/ADF4154/ADF4156

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Cycle slip reduction for faster lock times