Analog Devices Inc. EV-ADRF6658SD1Z

Overview

EV-ADRF6658SD1Z from Analog Devices is a fully populated, evaluation platform for the ADRF6658 - a wideband dual-channel RF downconverter IC with integrated IF digitally controlled amplifiers (DGAs). It supports 690 MHz–3.8 GHz RF input, offers programmable gain from −5 dB to +26.5 dB per channel, delivers 29 dBm IIP3 and 13 dB SSB NF at max DGA gain, and targets cellular base station receiver front-ends requiring high linearity and fast settling.

For engineers reviewing the EV-ADRF6658SD1Z datasheet, EV-ADRF6658SD1Z pinout, EV-ADRF6658SD1Z application, or EV-ADRF6658SD1Z equivalent, this board enables rapid characterization of dual-mixer performance, SPI-controlled DGA gain stepping, LO/RF/IF interface validation, and power-mode trade-off analysis (high-linearity vs. low-power) in real-world wireless infrastructure signal chains.

Technical Context

The EV-ADRF6658SD1Z implements the full ADRF6658 functional block diagram: dual doubly balanced Gilbert-cell mixers with internal tunable baluns, differential LO inputs (single-ended compatible), 300 Ω mixer outputs feeding 100 Ω differential IF DGA outputs, and independent 6-bit parallel or 3-wire SPI control of two 31.5 dB-range DGAs. All supply rails (MIXAVDD, MIXBVDD, DVDD, LOVDD, DGAAVDD, DGABVDD) are regulated to 3.3 V ±5% on-board.

It provides complete RF/LO/IF signal routing via SMA connectors (RF IN A/B, LO IN, IF OUT A/B), on-board decoupling, exposed-pad thermal management, and configurable jumpers for CHAEN/CHBEN, LATCHA/LATCHB, and power mode selection - enabling direct measurement of channel isolation (52 dB), power-up time (100 ns), and intermodulation suppression across temperature (−40°C to +105°C).

Key Specifications

Availability

EV-ADRF6658SD1Z is available at Aetrix Electronics and suitable for cellular base station development, active antenna system prototyping, and PTP radio link downconverter design requiring stable component supply, traceable evaluation hardware, and documented RF performance validation.

Supply support for EV-ADRF6658SD1Z 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, serving communications, industrial, automotive, and instrumentation markets with precision signal processing solutions.

The EV-ADRF6658SD1Z belongs to Analog Devices' RF & Microwave Evaluation Platform family, designed specifically to accelerate RF receiver design for wireless infrastructure by providing production-ready layouts, calibrated measurements, and full register-level control of high-linearity downconverters like the ADRF6658.

FAQ

What is the primary function of the EV-ADRF6658SD1Z?

The EV-ADRF6658SD1Z is an evaluation board for the ADRF6658 dual-channel RF downconverter IC. It enables engineers to validate mixer linearity (IIP3, P1dB), IF DGA gain accuracy (0.5 dB steps), channel isolation (52 dB), and power-mode transitions (100 ns wake-up) in real RF signal paths - not a standalone IC or component. The EV-ADRF6658SD1Z includes all necessary biasing, filtering, and interface circuitry to operate the ADRF6658 under datasheet conditions.

Does the EV-ADRF6658SD1Z support both differential and single-ended LO inputs?

Yes, the EV-ADRF6658SD1Z supports both configurations. Its LO input section includes an SMA connector wired to LOIN+ and LOIN− pins of the ADRF6658, with onboard termination options: for differential mode, both pins are AC-coupled; for single-ended mode, LOIN− is capacitor-terminated to ground per the ADRF6658 datasheet. This matches the IC's native flexibility and allows direct connection to common LO sources.

Can the EV-ADRF6658SD1Z be used to measure channel-to-channel isolation?

Yes. The EV-ADRF6658SD1Z provides independent RF IN A/B SMA connectors, separate IF OUT A/B SMA outputs, and isolated power domains - enabling precise 52 dB channel isolation measurement as specified in the ADRF6658 datasheet (Table 1). Test setup requires driving one RF input while monitoring leakage at the opposite IF output under matched 50 Ω/100 Ω terminations.

What power supply requirements does the EV-ADRF6658SD1Z have?

The EV-ADRF6658SD1Z requires a single 3.3 V DC supply delivering up to 550 mA (high-linearity dual-channel mode). On-board regulators condition this input to generate all required ADRF6658 rails: MIXAVDD, MIXBVDD, DVDD, LOVDD, DGAAVDD, and DGABVDD - each held at 3.3 V ±5% with low-noise decoupling. No additional voltage rails are needed.

Is SPI communication supported on the EV-ADRF6658SD1Z, and how is it accessed?

Yes, SPI communication is fully supported. The EV-ADRF6658SD1Z exposes CLK, DATA, LE, and SDO signals via a 0.1"-spaced header (J1), compatible with standard Analog Devices evaluation controllers (e.g., SDP-S) or custom microcontroller interfaces. Timing meets ADRF6658 specs: t1 ≥20 ns setup, t2 ≥10 ns data-to-clock, t7 ≥20 ns LE pulse width - enabling reliable register readback and gain configuration.