Overview
The ADF4158WCCPZ is a 6.1 GHz fractional-N frequency synthesizer produced by Analog Devices Inc. This device is designed for high-performance applications requiring direct modulation and waveform generation capabilities. It features a 25-bit fixed modulus, enabling subhertz frequency resolution at 6.1 GHz. The synthesizer includes a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider, along with a sigma-delta (Σ-Δ) based fractional interpolator. This configuration allows for programmable fractional-N division and supports various modulation schemes such as frequency shift keying (FSK) and phase shift keying (PSK).
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| RF Frequency Range | 6.1 GHz | ||||
| Fixed Modulus | 25-bit | Allows subhertz frequency resolution | |||
| Power Supply | 2.7 V | 3.3 V | V | ||
| Charge Pump Power Supply (VP) | 5.5 V | V | For extended tuning voltage | ||
| Maximum Charge Pump Output Current (ICP) | 5 mA | A | Set by RSET resistor | ||
| Normalized Phase Noise Floor (PNSYNTH) | -216 dBc/Hz | PLL loop bandwidth = 500 kHz; measured at 100 kHz offset | |||
| Operating Temperature | -40°C | +125°C | °C | ||
| Package Type | 24-WFQFN Exposed Pad |
Key Features
- Cycle slip reduction circuitry for faster lock times without modifications to the loop filter.
- Direct modulation and waveform generation capability, including sawtooth and triangular waveforms, parabolic ramp, and frequency shift keying (FSK).
- Programmable charge pump currents and a 3-wire serial interface for control of all on-chip registers.
- Digital lock detect and power-down mode for power management.
- Qualified for automotive applications.
Applications
- Frequency modulated continuous wave (FMCW) radar.
- Communications test equipment.
- Automotive applications.
Q & A
- What is the maximum RF frequency range of the ADF4158WCCPZ?
The maximum RF frequency range is 6.1 GHz.
- What is the resolution of the frequency synthesizer?
The device features a 25-bit fixed modulus, allowing subhertz frequency resolution.
- What is the power supply range for the ADF4158WCCPZ?
The power supply range is from 2.7 V to 3.3 V.
- What is the purpose of the cycle slip reduction circuitry?
The cycle slip reduction circuitry leads to faster lock times without the need for modifications to the loop filter.
- What types of modulation does the ADF4158WCCPZ support?
The device supports frequency shift keying (FSK) and phase shift keying (PSK) modulation.
- What is the maximum charge pump output current?
The maximum charge pump output current is 5 mA, set by the RSET resistor.
- What is the operating temperature range for the ADF4158WCCPZ?
The operating temperature range is from -40°C to +125°C.
- What package type is the ADF4158WCCPZ available in?
The device is available in a 24-WFQFN Exposed Pad package.
- Is the ADF4158WCCPZ qualified for automotive applications?
Yes, the device is qualified for automotive applications.
- What interface is used for controlling the on-chip registers?
A simple 3-wire serial interface is used for controlling the on-chip registers.
