Analog Devices: EVAL-ADF4350EB1Z Evaluation Board for ADF4350 Wideband Synthesizer

Overview   The EVAL-ADF4350EB1ZEVAL-ADF4350EB1Z is an Evaluation Board designed to evaluate the performance of the ADF4350ADF4350 frequency synthesizer. It contains the ADF4350BCPZADF4350BCPZ synthesizer, a USB connector and related interface, a 25 MHz TCXO reference source, SMA connectors for the RF outputs, and reference signal plus headers for various signals and voltages. There is also a loop filter (35 kHz) on board. A USB cable is included with the board to connect to a PC USB port.   The ADF4350ADF4350 Wideband Synthesizer with Integrated VCO allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers if used with an external loop filter and external reference frequency.The ADF4350BCPZADF4350BCPZ has an integrated voltage controlled oscillator (VCO) with a fundamental output frequency ranging from 2200 MHz to 4400 MHz. In addition, divide-by-1/2/4/8 or 16 circuits allow the user to generate RF output frequencies as low as 137.5 MHz.   Self-contained board including PLL, VCO, loop filter (35 kHz), 25 MHz TCXO reference, USB interface, and voltage regulators Accompanying software allows control of synthesizer functions from a PC Choice of power supply via USB or external feeding Typical phase noise performance of −99 dBc/Hz @ 1 kHz offset from carrier (1 GHz output frequency)   Key Applications: Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT), Test equipment, Wireless LANs, CATV equipment, Clock generation.

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Software Tools

The control software for the EVAL-ADF4350 accompanies the EVAL-ADF4350EB1Z on a CD. The software allows you to control of synthesizer functions from a PC, including

• set correct reference frequency and reference frequency divider
• controls the charge pump current setting, the output power setting, and the multiplexer output setting
• control the output frequency
• select Low Spur Mode or Low Noise Mode for the frac-N mode
• displays selected settings & every bit of the register settings

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Technical Documents

Learning Center

Design Elements

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Video

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Kit Features

• The package also contains Windows software (2000- and XP-compatible) to allow easy programming of the synthesizer.
• The EVAL-ADF4350EB1ZEVAL-ADF4350EB1Z comes with a cable for connecting to the USB port of a PC.
• The EVAL-ADF4350EB1Z can be powered either from the USB port or via dc power connectors (4 mm banana connec-tors).
  • When feeding via banana connectors, 3.75 V to 5.5 V is a suitable feeding voltage.
  • The power supply circuitry allows the user to use one or two separate LDOs to feed the ADF4350ADF4350 (using fewer LDOs increases the risk of spur contaminated dc feeds).
• In case the USB processor or clock causes spurs on the RF output signal, the user may feed the evaluation board via the dc connectors and unplug the USB cable, thereby removing power from the USB interface circuitry.
  • There is also a grounded frame surrounding the USB interface circuitry to allow mounting of a shielding box.
• The EVAL-ADF4350EB1ZEVAL-ADF4350EB1Z has two SMA output connectors (differential outputs).
  • The device is quite sensitive to impedance unbalance.
  • If only one port of a differential pair is used, termi-nate the other with a 50 Ω load.
  • If the user wishes to utilize the auxiliary outputs, use the EVAL-ADF4350EB2ZEVAL-ADF4350EB2Z
• The 25 MHz TCXO from Rakon Limited provides the necessary reference signal. An external REFIN may be used if desired. In this case, disable the on-board TCXO by removing R1 and R2. R9 can be populated with 50 Ω to adjust impedance matching of the evaluation board to the external reference source.

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Kit Contents

The EVAL-ADF4350EB1ZEVAL-ADF4350EB1Z supplied with below contents:

• EVAL-ADF4350EB1ZEVAL-ADF4350EB1Z PLL Frequency Synthesizer Evaluation Board
• Evaluation board software CD
• USB cable

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