Analog Devices Inc. ADRF6702-EVALZ

Overview

ADRF6702-EVALZ from Analog Devices is a fully assembled, lead-free evaluation board for the ADRF6702 quadrature modulator with integrated fractional-N PLL and VCO. It enables rapid characterization of RF output (1200–2400 MHz), LO synthesis (1550–2150 MHz), baseband bandwidth (750 MHz), output P1dB (13.1 dBm @ 2140 MHz), and noise floor (−159.6 dBm/Hz @ 1960 MHz) in cellular transceiver design.

For engineers reviewing the ADRF6702-EVALZ datasheet, ADRF6702-EVALZ pinout, ADRF6702-EVALZ application, or ADRF6702-EVALZ equivalent, this board supports SPI-controlled PLL programming, on-board loop filter configuration, differential I/Q baseband interface, and 5 V/240 mA power delivery - critical for LTE/W-CDMA transmitter validation and RFIC integration verification.

Technical Context

The ADRF6702-EVALZ implements the full signal chain of the ADRF6702 IC: it routes the 40-lead LFCSP device's RFOUT to a calibrated SMA output, exposes all 24-bit SPI control lines (CLK/DATA/LE), provides configurable VTUNE loop filter nodes, and supports both internal VCO operation and external LO injection via LOP/LON headers. The board integrates decoupling networks for all seven VCC pins and dedicated DECLx LDO bypassing per datasheet layout guidelines.

It enables direct measurement of key performance metrics including sideband suppression (−53.9 dBc @ 1960 MHz), carrier feedthrough (−46.8 dBm @ 2140 MHz), quadrature error (±1°), and phase noise (−107.5 dBc/Hz @ 10 kHz offset, 2140 MHz). All test points and jumpers align with the ADRF6702's functional block diagram and register-mapped control architecture.

Key Specifications

Availability

ADRF6702-EVALZ is available at Aetrix Electronics and suitable for LTE base station development, W-CDMA transmitter prototyping, and satellite modem RF front-end validation requiring stable component supply and repeatable lab-grade measurement capability.

Supply support for ADRF6702-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 ADRF6702-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, designed specifically to accelerate time-to-test for integrated RF transceivers used in cellular infrastructure and broadband wireless systems.

FAQ

What is the primary function of the ADRF6702-EVALZ?

The ADRF6702-EVALZ is an evaluation board that provides hardware and software infrastructure to characterize the ADRF6702 quadrature modulator IC. It allows engineers to validate RF output performance, PLL lock behavior, baseband linearity, and SPI register control without custom PCB design. The board includes all necessary passive components, SMA connectors, and test points aligned to the ADRF6702's pinout and functional requirements.

Does the ADRF6702-EVALZ support external LO injection?

Yes, the ADRF6702-EVALZ supports external LO injection through the LOP and LON headers. When LOSEL is set low and LDRV/LXL bits in Register 5 are configured accordingly, the board routes an externally applied 2× LO signal directly to the ADRF6702's modulator core. This mode disables the internal VCO and reduces power consumption to 130 mA, enabling flexible system-level LO distribution testing.

How is the loop filter implemented on the ADRF6702-EVALZ?

The ADRF6702-EVALZ provides unpopulated pads and jumper options for a third-order passive loop filter between CP and VTUNE. It supports standard configurations referenced in the ADRF6702 datasheet (e.g., 130 kHz bandwidth), with provision for resistor/capacitor selection matching the chosen charge pump current (250–1000 µA). The board also includes test points for VTUNE voltage monitoring and loop filter node probing.

Can the ADRF6702-EVALZ be used for temperature-dependent RF characterization?

Yes, the ADRF6702-EVALZ exposes the MUXOUT pin, which can be configured to output a voltage proportional to absolute temperature (VPTAT) from the ADRF6702's on-die sensor. With a known temperature coefficient of 3.9 mV/°C and calibration at 25°C (1.64 V), users can correlate RF performance metrics - such as OP1dB drift or phase noise variation - against junction temperature across the −40°C to +85°C operating range.

Is SPI communication to the ADRF6702 on the ADRF6702-EVALZ compatible with standard microcontrollers?

Yes, the ADRF6702-EVALZ uses standard CMOS-level SPI signals (CLK, DATA, LE) compliant with 1.4–3.3 V logic thresholds. It supports 20 MHz clock rates and 24-bit frame structure with three LSB control bits selecting among six internal registers. The board includes series resistors and pull-downs to ensure robust timing margins per datasheet specifications (t1–t7), making it directly interfaced with common MCU/FPGA development platforms.