ADF4157 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADF4157
Manufacturer

ADI
ChipWorker Part#

CW389421353
Description

High Resolution 6GHz Fractional-N Frequency Synthesizer
Documentation

Datasheet

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ADF4157 Specifications

Attribute	Attribute Value

Part Number	ADF4157
Manufacturer	ADI
ChipWorker Part#	CW389421353
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

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**
Satellite communications terminals, radar equipment
Instrumentation equipment
Personal mobile radio (PMR)
Base stations for mobile radio
Wireless handsets
### Features and Benefits
RF bandwidth to 6 GHz
25-bit fixed modulus allows subhertz frequency resolution
2.7 V to 3.3 V power supply
Separate VP allows extended tuning voltage
Programmable charge pump currents
3-wire serial interface
Digital lock detect
Power-down mode
Pin compatible with the following frequency synthesizers: ADF4110/ADF4111/ADF4112/ADF4113 ADF4106/ADF4153/ADF4154/ADF4156
Cycle slip reduction for faster lock times

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