ADF4159 Direct Modulation/Fast Waveform Generating, 13 GHz, Fractional-N Frequency Synthesizer
The ADF4159 is a 13 GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. The part uses a 25-bit fixed modulus, allowing subhertz frequency resolution.
The ADF4159 consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. The Σ-Δ-based fractional interpolator allows programmable fractional-N division. The INT and FRAC registers define an overall N divider as N = INT + (FRAC/225).
The ADF4159 can be used to implement frequency shift keying (FSK) and phase shift keying (PSK) modulation. Frequency sweep modes are also available to 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 ADF4159 features cycle slip reduction circuitry, which enables 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 ADF4159 operates with an analog power supply in the range of 2.7 V to 3.45 V and a digital power supply in the range of 1.62 V to 1.98 V. The device can be powered down when not in use.
Applications
- Communications infrastructure
- Communications test equipment
- Instrumentation
- FMCW radars
Features and BenefitsRF bandwidth to 13 GHzHigh and low speed FMCW ramp generation25-bit fixed modulus allows subhertz frequency resolutionPFD frequencies up to 110 MHzNormalized phase noise floor of −224 dBc/HzFSK and PSK functionsSawtooth, triangular, and parabolic waveform generationRamp superimposed with FSKRamp with 2 different sweep ratesRamp delay, frequency readback, and interrupt functionsProgrammable phase control2.7 V to 3.45 V analog power supply1.8 V digital power supplyProgrammable charge pump currents3-wire serial interfaceDigital lock detectESD performance: 3000 V HBM, 1000 V CDMQualified for automotive applications | Aerospace and DefenseInstrumentation and Measurement- Electronic Test & Measurement
Reference DesignsSoftware & Systems Requirements |
Data Sheets
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADF4159CCPZ Production | 24 ld LFCSP (4x4x.75mm w/2.10mm EP) | OTH 490 | -40 to 125C | 8.09 | 7.49 | Y |
| ADF4159CCPZ-RL7 Production | 24 ld LFCSP (4x4x.75mm w/2.10mm EP) | REEL 1500 | -40 to 125C | 0 | 7.49 | Y |
| ADF4159WCCPZ Production | 24 ld LFCSP (4x4x.75mm w/2.10mm EP) | OTH 490 | -40 to 125C | 8.9 | 8.23 | Y |
| ADF4159WCCPZ-RL7 Production | 24 ld LFCSP (4x4x.75mm w/2.10mm EP) | REEL 1500 | -40 to 125C | 0 | 8.23 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EV-ADF4159EB1Z | Evaluation Board (12 GHz VCO, 284 kHz Loop Bandwidth, 48° Phase Margin) | 200 | Y |
| EV-ADF4159EB3Z | Evaluation Board (Set up for External, SMA Connected VCO Board; Filter Unpopulated) | 175 | Y |
Reference Materials
