Analog Devices Inc. ADMV4420-EVALZ

Overview

ADMV4420-EVALZ from Analog Devices is a full-feature evaluation board for the ADMV4420 K-band downconverter IC, integrating a fractional-N PLL, VCO, LNA, double-balanced mixer, and IF amplifier. It operates from a 5 V dc supply, includes an on-board 50 MHz crystal oscillator, and supports SPI control via SDP-S interface and ACE software. Designed for satellite communications RF front-end validation.

For engineers reviewing the ADMV4420-EVALZ datasheet, ADMV4420-EVALZ pinout, ADMV4420-EVALZ application, or ADMV4420-EVALZ equivalent, this board enables rapid characterization of LO synthesis, RF-to-IF conversion, and PLL lock behavior in K-band (16.75–21.15 GHz RF input) systems with integrated calibration and real-time register control.

Technical Context

The ADMV4420-EVALZ implements hardware and firmware infrastructure to evaluate the ADMV4420's integrated SiGe BiCMOS signal chain: a 50 MHz crystal-driven reference path feeds a fractional-N PLL with ×2 multiplier, generating LO signals from 8.375 GHz to 10.575 GHz for downconversion; the RF input path includes an integrated balun and LNA delivering 7 dB SSB noise figure, while the IF output stage provides 36 dB nominal gain.

Control is implemented via SPI through an on-board SDP-S connector, with ACE software providing graphical access to all 32-bit registers-including INT/FRAC/MOD programming, charge pump current (312.5–5000 µA), bleed current (0–956.25 µA), VCO band/core readback, and lock detect configuration-enabling full functional verification without external logic.

Key Specifications

Availability

ADMV4420-EVALZ is available at Aetrix Electronics and suitable for K-band satellite communications development, RF front-end prototyping, and PLL/VCO performance validation requiring stable component supply and full evaluation infrastructure.

Supply support for ADMV4420-EVALZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADMV4420-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, designed specifically to accelerate design-in and performance validation of highly integrated RF transceivers and downconverters for aerospace, defense, and satellite communications applications.

FAQ

What is the primary function of the ADMV4420-EVALZ?

The ADMV4420-EVALZ is a dedicated evaluation platform for the ADMV4420 K-band downconverter IC. It provides complete hardware and software infrastructure-including on-board 50 MHz crystal, SDP-S SPI interface, ACE software integration, and calibrated RF/IF paths-to validate RF-to-IF conversion, fractional-N PLL lock behavior, VCO autocalibration, and register-level control of the ADMV4420 in real-world satellite communication front-end designs.

Does the ADMV4420-EVALZ require an external power supply?

Yes, the ADMV4420-EVALZ requires a 5 V dc power supply connected to the VPOS1 test point and GND2 test point. This voltage powers both the ADMV4420 IC and supporting circuitry. The board does not derive power from the SDP-S USB connection alone; external 5 V dc is mandatory for full functionality and RF signal generation.

Can the ADMV4420-EVALZ operate without the on-board 50 MHz crystal?

Yes, the ADMV4420-EVALZ supports external reference injection via the J2 SMA connector. To use an external reference, Y1 (crystal), C5, and C6 must be depopulated, and a 0.01 µF capacitor installed at C21, a 1 nF capacitor at C6, and a 50 Ω resistor at R21 per UG-1404 instructions. The REF_IN_MODE bit (Register 0x20E, Bit 1) must then be set to 1 to select single-ended external mode.

Which software is required to control the ADMV4420-EVALZ?

The ADMV4420-EVALZ requires Analog Devices' Analysis, Control, Evaluation (ACE) software with the Board.ADMV4420 plug-in. ACE provides a graphical block diagram interface mapping directly to ADMV4420 registers-enabling real-time configuration of PLL parameters (INT/FRAC/MOD), charge pump settings, VCO enable/control, LNA/mixer/IF amplifier enables, and lock detection-without custom firmware or low-level SPI coding.

What test equipment is needed to perform basic measurements with the ADMV4420-EVALZ?

Basic evaluation requires a 5 V dc power supply, SDP-S controller board with USB cable, RF signal generator (for RFIN), and spectrum analyzer (for IFOUT). A 50 Ω SMA female to 75 Ω Type F male adapter is included for IF output connection. Optional equipment includes low-phase-noise reference sources for advanced PLL analysis and network analyzers for S-parameter characterization.