Analog Devices Inc. AD8346-EVALZ

Overview

AD8346-EVALZ from Analog Devices is an evaluation board for the AD8346 0.8 GHz–2.5 GHz silicon RFIC quadrature modulator. It enables functional validation and performance characterization of the AD8346's I/Q modulation, sideband suppression (−36 dBc @ 1.9 GHz), quadrature accuracy (1° rms phase error), and RF output (−10 dBm typical) in RF transceiver signal chains. The board supports differential baseband input, ac-coupled LO drive via ETC1-1-13 balun, and 50 Ω dc-coupled RF output.

For engineers reviewing the AD8346-EVALZ datasheet, AD8346-EVALZ pinout, AD8346-EVALZ application, or AD8346-EVALZ equivalent, this board provides a production-representative platform to verify SSB modulation, carrier feedthrough nulling, ACPR (−72 dBc), EVM (2.5%), and LO-to-RF isolation across temperature (−40°C to +85°C) and supply (2.7 V–5.5 V).

Technical Context

The AD8346-EVALZ implements the reference design from Analog Devices' AD8346 Rev. A datasheet, featuring a 4-layer FR4 PCB with internal ground planes, SMA connectors for I/Q, LO, and RF paths, and configurable enable control via slide switch SW1 (A = enabled, B = standby). It replicates the basic connections schematic (Figure 27) including 100 pF + 0.01 μF local decoupling on VPS1/VPS2, 50 Ω termination for LOIN/LOIP, and bias networks for IBBP/IBBN/QBBP/QBBN.

It supports both dc-coupled and ac-coupled DAC interfaces-validated with AD9761 TxDAC-and includes test points (TP2, ENOP) and zero-ohm jumpers (RIP/RIN/RQP/RQN) for signal routing flexibility. The board integrates the exact 16-lead TSSOP footprint and thermal layout required for the AD8346 IC, enabling direct correlation between evaluation results and final system behavior.

Key Specifications

Availability

AD8346-EVALZ is available at Aetrix Electronics and suitable for RF transceiver development, wireless LAN prototyping, and CDMA/PCS/ISM system validation requiring stable component supply, traceable evaluation hardware, and documented characterization setups.

Supply support for AD8346-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 RF ICs, headquartered in Norwood, MA, with decades of expertise in precision signal processing and radio frequency design.

The AD8346-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, engineered to accelerate time-to-test for RFICs used in cellular infrastructure, wireless communications, and spectrum-constrained systems.

FAQ

What is the primary function of the AD8346-EVALZ?

The AD8346-EVALZ is a dedicated evaluation board designed exclusively to characterize and validate the AD8346 0.8 GHz–2.5 GHz quadrature modulator IC. It provides full access to all 16 pins of the AD8346 in its native 16-lead TSSOP package, implements recommended decoupling, biasing, and interface circuitry per the AD8346 Rev. A datasheet, and supports measurement of key RF metrics including sideband suppression, carrier feedthrough, and EVM under real-world conditions.

Does the AD8346-EVALZ support both dc-coupled and ac-coupled baseband interfaces?

Yes, the AD8346-EVALZ supports both configurations. Its design accommodates dc-coupled interfaces (e.g., with AD9761 TxDAC using precision resistor networks to set 1.2 V common-mode bias) and ac-coupled interfaces (using external capacitors and bias resistors), as detailed in Figures 28 and 29 of the AD8346 Rev. A datasheet. Jumpers and pads allow flexible implementation without board modification.

How is the LO input driven on the AD8346-EVALZ?

The AD8346-EVALZ uses an M/A-COM ETC1-1-13 balun to convert single-ended 50 Ω LO source signals into differential drive for the AD8346's LOIP/LOIN pins. This configuration achieves optimal sideband suppression and minimizes LO feedthrough, as specified in the AD8346 datasheet. The board includes 100 pF AC coupling capacitors on both LO lines and open pads for optional series resistors (RLOP/RLON).

Can the AD8346-EVALZ be used to measure temperature-dependent performance?

Yes, the AD8346-EVALZ is fully compatible with environmental chamber testing across the AD8346's specified operating range of −40°C to +85°C. Its 4-layer FR4 construction with internal ground planes ensures thermal stability, and test points (e.g., TP2, power rails) allow in-situ monitoring of supply current, enable state, and RF output while under temperature stress-enabling validation of parameters like carrier feedthrough drift and SSB output power variation.

Is the AD8346-EVALZ pin-compatible with other Analog Devices evaluation platforms?

No, the AD8346-EVALZ is purpose-built for the AD8346 IC and not pin-compatible with other Analog Devices evaluation boards. Its layout, connector placement (SMA for I/Q/LO/VOUT), and component selection are optimized specifically for the AD8346's 16-lead TSSOP package, differential baseband architecture, and RF performance requirements. Interchangeability with other boards such as ADL5375-EVALZ or AD9122-M5375-EBZ is not supported.