Analog Devices has released a wideband synthesizer with an integrated voltage-controlled oscillator (VCO) that delivers breakthrough performance and flexibility and is ideal for diverse market applications such as aerospace and defence, wireless infrastructure, microwave point-to-point links, electronic test and measurement, and satellite terminals.

Analog Devices new ADF5610 wideband fractional-N synthesizer generates RF outputs from 55 MHz to 15 GHz and provides the industry’s lowest phase noise performance on a single chip. When compared to alternative solutions that require multiple narrowband GaAs voltage controlled oscillators and phase-locked loops(PLLs), the ADF5610 offers 50% less power dissipation, smaller footprint and simpler architecture which translates into bill of materials cost savings and reduced time to market.

Developed on Analog Devices proprietary advanced SiGe BiCMOS process, the ADF5610 enables high modulation bandwidths and low BIT error rates. It features industry leading VCO phase noise (–114 dBc/Hz @ 100 kHz offset and –165 dBc/Hz @ 100 MHz offset both at 10GHz) and low normalized phase noise floor (FOM) of –229 dBc/Hz. The integrated PLL function provides fast frequency hopping and lock times (<50 μs with appropriate loop filter). The phase detector spurious levels are below –45 dBc typical, and the RF output power level is 6 dBm.

ADF5610 Functional Block Diagram

The ADF5610 wideband fractional-N synthesizer is easy to design-in, and fully supported by the ADIsimPLL™, Analog Devices' comprehensive and easy-to-use PLL synthesizer design and simulation tool for assessing phase noise, lock time, jitter and other design considerations. The device is also customer programmable through the use of integrated SPI interface and control software.

The ADF5610 is specified over the –40°C to +85°C range. It operates from nominal 3.3-V analog and digital power supplies as well as 5-V charge-pump and VCO supplies, and feature 1.8-V logic-level compatibility. The synthesizer also contains hardware and software power down modes.

The ADF5610 is supported by the EV-ADF5610SD1Z evaluation board which allows designers to evaluate the performance of the ADF5610 frequency synthesizer with integrated VCO for phase-locked loops (PLLs).
The evaluation board contains the ADF5610 synthesizer with integrated voltage controlled oscillator (VCO), a low noise, single-ended, 50 MHz voltage controlled crystal oscillator (VCXO) reference, the HMC1031 Integer N PLL, a switch, a jumper, a loop filter, a USB interface, and subminiature Version A (SMA) connectors. The EV-ADF5610SD1Z evaluation board require SDP-S controller board EVAL-SDP-CS1Z, the SDP-S allows software programming of the ADF5610 device through a USB interface. For easy programming of the synthesizer there is Windows^®-based software which can be download from the Analog Devices website.

Key features

• RF output frequency range: 57 MHz to 14,600 MHz
• RFOUT: 7300 MHz to 14,600 MHz
• PDIV/NDIV: 57 MHz to 14,600 MHz
• Fractional-N synthesizer and Integer N synthesizer modes
• 24-bit fractional modulus
• Exact frequency mode for 0 Hz frequency error
• Typical PFD spurious: <−105 dBc
• Integrated rms jitter: <40 fs
• Normalized inband phase noise floor FOM
  • High current mode: −232 dBc/Hz (integer) and −229 dBc/Hz (fractional)
  • Normal mode: −229 dBc/Hz (integer) and −226 dBc/Hz (fractional)
• Maintains frequency lock over −40°C to +85°C (lock and leave)
• Low phase noise VCO
  • −115 dBc/Hz typical at 100 kHz (7.3 GHz)
  • −114 dBc/Hz typical at 100 kHz (10 GHz)
  • −109 dBc/Hz typical at 100 kHz (14.6 GHz)
• RFOUT power: 5 dBm
• Programmable divide by 1, 2, 4, 8, 16, 32, 64, or 128 output
• Programmable output power level
• Typical power dissipation: 815 mW
• Programmable low current and power dissipation: <700 mW
• Fast frequency hopping (autocalibration enabled): <40 μs
• 48-terminal, 7 mm × 7 mm LGA package: 49 mm²

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Click here to download the ADF5610 Datasheet

Click here to download the ADF5610 Eval Board User Guide

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