ADF4158 - ADI

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

Part No

ADF4158
Manufacturer

ADI
ChipWorker Part#

CW149696966
RoHS

Lead free / RoHS Compliant
Description

Direct Modulation/Waveform Generating, 6.1GHz Fractional-N Frequency Synthesizer
Documentation

Datasheet

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ADF4158 Specifications

Attribute	Attribute Value

Part Number	ADF4158
Manufacturer	ADI
ChipWorker Part#	CW149696966
Documentation	Datasheet
	expand all
Product Lifecycle Status	Recommended for New Designs
RoHS	RoHS Compliant

Product Description

Product Details
The ADF4158 is a 6.1 GHz, fractional-N frequency synthesizer with modulation and waveform generation capability. It contains a 25-bit fixed modulus, allowing subhertz resolution at 6.1 GHz. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a sigma-delta (Σ-Δ) based fractional interpolator to allow programmable fractional-N division. The INT and FRAC registers define an overall N-divider as N = INT + (FRAC/225).
The ADF4158 can be used to implement frequency shift keying (FSK) and phase shift keying (PSK) modulation. There are also a number of frequency sweep modes available, which generate various waveforms in the frequency domain, for example, sawtooth and triangular waveforms. Sweeps can be set to run automatically, or each step manually triggered by an external pulse. The ADF4158 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**
Frequency modulated continuous wave (FMCW) radar
Communications test equipment
### Features and Benefits
RF bandwidth to 6.1 GHz
25-bit fixed modulus allows subhertz frequency resolution
Frequency and phase modulation capability
Sawtooth and triangular waveforms in the frequency domain
Parabolic ramp
Ramp superimposed with FSK
Ramp with 2 different sweep rates
Ramp delay
Ramp frequency readback
Ramp interruption
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
Cycle slip reduction for faster lock times
Switched bandwidth fast-lock mode
Qualified for automotive applications

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