Analog Devices Inc. ADRF6780-EVALZ

Overview

ADRF6780-EVALZ from Analog Devices is an evaluation board designed to characterize the ADRF6780 5.9 GHz to 23.6 GHz wideband microwave upconverter. It supports both IF-mode (800–3500 MHz real input) and IQ-mode (baseband differential inputs) operation, features on-board USB-SPI interface, 5 V single-supply operation, and ACE software control for quadrature tuning and sideband suppression optimization.

For engineers reviewing the ADRF6780-EVALZ datasheet, ADRF6780-EVALZ pinout, ADRF6780-EVALZ application, or ADRF6780-EVALZ equivalent, this page delivers verified hardware configuration details, lab setup guidance, SPI register mapping, VATT voltage control via AD5601 nanoDAC, and RF performance validation data across LO ×1/×2 modes and upper/lower sideband configurations.

Technical Context

The ADRF6780-EVALZ implements full-feature evaluation of the ADRF6780 SiGe upconverter, enabling direct RF synthesis from baseband IQ or real IF inputs with sideband suppression >25 dBc. It integrates a 5 V power distribution network, 2.92 mm RF/LO/IF connectors, mini-USB for SPI communication, and on-board AD5601 nanoDAC for precise VATT bias control (0–2600 mV).

Hardware design includes configurable jumpers for PWDN and reset, selectable termination networks (R10–R13) for IQ/IF mode isolation, and test points for VDET, ADC readback, and supply rails (5 V, 3.3 V, 1.8 V). The board's ACE plugin mirrors the ADRF6780 internal block diagram-including LO buffer, quad splitter, VGA, detector, and ADC blocks-with real-time register access and auto-apply functionality.

Key Specifications

Availability

ADRF6780-EVALZ is available at Aetrix Electronics and suitable for microwave radio development, mmWave transceiver prototyping, and high-frequency upconverter validation requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADRF6780-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, serving communications, industrial, automotive, and aerospace markets.

The ADRF6780-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform family, engineered specifically to accelerate characterization and integration of high-frequency upconverters in point-to-point microwave radio designs.

FAQ

What is the primary function of the ADRF6780-EVALZ?

The ADRF6780-EVALZ is a dedicated evaluation board for the ADRF6780 wideband upconverter IC. It enables full functional testing-including IF-mode and IQ-mode upconversion, sideband suppression tuning, VATT bias optimization, and SPI register configuration-using standard lab equipment (RF signal generator, spectrum analyzer) and Analog Devices' ACE software. The ADRF6780-EVALZ itself contains no active RF conversion circuitry beyond the mounted ADRF6780 die.

Which software is required to operate the ADRF6780-EVALZ?

The ADRF6780-EVALZ requires Analog Devices' Analysis|Control|Evaluation (ACE) software, along with the ADRF6780 plugin and USB drivers for the ADRF6780-042654 Rev. A hardware ID. ACE provides a graphical block diagram interface that maps directly to ADRF6780 internal registers, enabling real-time control of LO enable/buffer, IQ/IF mode selection, quadrature tuning, detector enable, and ADC readback. The ADRF6780-EVALZ does not operate without ACE or compatible firmware.

How is VATT voltage controlled on the ADRF6780-EVALZ?

VATT voltage on the ADRF6780-EVALZ is set via an on-board AD5601 nanoDAC, accessible through the ACE software's Initial Configuration menu or the dedicated AD5601 plugin tab. The DAC outputs 0–3300 mV, but only 0–2600 mV affects ADRF6780 gain; above 2600 mV, gain saturates. External VATT sources can be used by powering down the AD5601 via ACE, and the ADRF6780-EVALZ provides test points (VATT, GND) for external injection.

What RF and LO connectivity options does the ADRF6780-EVALZ provide?

The ADRF6780-EVALZ uses Southwest/SRI 2.92 mm coaxial connectors for all high-frequency paths: RFON/RFOP (differential RF output), LOIN/LOIP (differential LO input), and IFIN/IFIP (differential IF input). For IQ-mode evaluation, BBIN/BBIP/BBQN/BBQP are accessed via solder pads or edge-mount SMA adapters (not included). Differential operation requires external 180° hybrids-specified for 5.9–23.6 GHz (LO/RF) and 500 MHz–4 GHz (IF)-as documented in UG-920 Figures 5 and 6.

Does the ADRF6780-EVALZ support both LO ×1 and LO ×2 operation?

Yes, the ADRF6780-EVALZ fully supports both LO ×1 and LO ×2 modes via SPI register control (LO_×2_ENABLE bit in Register 0x03). Mode selection determines whether the ADRF6780 upconverts using fundamental LO frequency (×1) or its second harmonic (×2), enabling coverage across the full 5.9–23.6 GHz RF band with appropriate LO source selection. The ACE software GUI includes explicit toggles for LO ×2 Enable, LO Sideband, and Quad Splitter Buffer to configure each mode correctly.