Analog Devices Inc. ADL5519-EVALZ

Overview

ADL5519-EVALZ from Analog Devices is an evaluation board designed to characterize and prototype the ADL5519 dual-channel RF logarithmic detector/controller IC. It supports full-bandwidth operation from 1 MHz to 10 GHz, delivers ±1 dB dynamic range up to 56 dB (at 3.6 GHz), enables differential channel difference outputs (OUTP/OUTN), and integrates a calibrated temperature sensor output (TEMP pin). Engineers use it for RF power amplifier linearization, VSWR monitoring, and dual-channel RSSI measurement in wireless infrastructure.

For engineers reviewing the ADL5519-EVALZ datasheet, ADL5519-EVALZ schematic, ADL5519-EVALZ layout, or ADL5519-EVALZ BOM, this board provides validated signal integrity, calibrated RF input paths (INHA/INHB), accessible log outputs (OUTA/OUTB/OUTP/OUTN), on-board temperature sensing, and configurable setpoint/control interfaces (VSTA/VSTB/ADJA/ADJB) - all optimized for rapid validation of RF gain control, power monitoring, and antenna mismatch detection circuits.

Technical Context

The ADL5519-EVALZ implements the full functional interface of the ADL5519 IC: dual 50 Ω AC-coupled RF inputs (INHA/INHB), independent log voltage outputs (OUTA/OUTB), differential difference outputs (OUTP/OUTN), temperature-sensing node (TEMP), and precision reference (VREF = 1.15 V). It maintains the IC's 3.3 V–5.5 V supply range and supports both measurement mode (logarithmic voltage output) and controller mode (setpoint-driven VGA control).

Board-level design includes matched 50 Ω microstrip traces, low-inductance ground planes, decoupling networks for VPSA/VPSB/VPSR supplies, loop filter pads (CLPA/CLPB), and jumper-selectable biasing for VLVL, PWDN, and ADJ pins - preserving the ADL5519's 6 ns fall time, 10 MHz video bandwidth, and ±0.5 dB temperature stability across −40°C to +85°C.

Key Specifications

Availability

ADL5519-EVALZ is available at Aetrix Electronics and suitable for RF transmitter linearization, antenna VSWR monitoring, dual-channel wireless infrastructure radios, and base station RSSI measurement requiring stable component supply and fast prototyping turnaround.

Supply support for ADL5519-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 Wilmington, MA, serving communications, industrial, automotive, and instrumentation markets since 1965.

The ADL5519-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform family, engineered specifically to accelerate development of high-frequency power control, envelope detection, and real-time RF signal monitoring systems.

FAQ

What is the primary function of the ADL5519-EVALZ?

The ADL5519-EVALZ is a fully assembled and tested evaluation board for the ADL5519 dual-channel RF logarithmic detector/controller IC. It enables engineers to validate log conformance, channel matching, temperature compensation, and difference-output functionality across 1 MHz–10 GHz. The board provides direct access to all critical signals-including INHA/INHB, OUTA/OUTB, OUTP/OUTN, TEMP, and VREF-supporting rapid integration into RF power control and VSWR monitoring designs. ADL5519-EVALZ includes calibrated SMA inputs, test points, and configuration jumpers for flexible lab and benchtop use.

Does the ADL5519-EVALZ support both measurement and controller modes?

Yes, the ADL5519-EVALZ supports both measurement mode (logarithmic voltage output proportional to RF input power) and controller mode (closed-loop gain control using VSTA/VSTB setpoints). It provides dedicated test points and solder jumpers for ADJA/ADJB (temperature compensation), VLVL (common-mode offset), and PWDN (power-down), allowing full functional validation of the ADL5519 IC's dual operational states. All required biasing, filtering, and termination networks are implemented per Analog Devices' recommended layout guidelines. ADL5519-EVALZ documentation includes schematics and setup instructions for both modes.

What RF input interface does the ADL5519-EVALZ provide?

The ADL5519-EVALZ features two 50 Ω SMA connectors for AC-coupled RF inputs (INHA and INHB), each with matched microstrip routing, DC-blocking capacitors, and proper grounding to preserve the ADL5519's wideband performance from 1 MHz to 10 GHz. Input return loss is optimized per the datasheet's impedance targets (e.g., 1670||0.47 Ω||pF at 100 MHz). The board also exposes INLA and INLB common nodes for differential or single-ended configurations. ADL5519-EVALZ includes layout notes confirming controlled impedance and minimal parasitic coupling between channels.

How is temperature sensing implemented on the ADL5519-EVALZ?

The ADL5519-EVALZ routes the ADL5519's TEMP pin (Pin 19) to a dedicated test point and includes a calibrated 10 kΩ pull-up resistor and RC filter to stabilize readings. The TEMP output delivers 1.36 V at 25°C with a linear 4.5 mV/°C slope across −40°C to +125°C, enabling ambient and junction temperature tracking. Board documentation specifies trace length limits and grounding practices to minimize noise injection. ADL5519-EVALZ allows direct connection to external ADCs or monitoring circuits without additional signal conditioning - verified in the ADL5519 datasheet's characterization section.

Can the ADL5519-EVALZ be used for automatic gain control (AGC) loop testing?

Yes, the ADL5519-EVALZ is explicitly configured for AGC loop validation. It provides accessible OUTA/OUTB outputs to drive variable gain amplifiers (VGAs), VSTA/VSTB inputs to accept external setpoint voltages, and FBKA/FBKB feedback nodes for closed-loop stability analysis. The board's low-noise output routing (<10 nV/√Hz at 2.2 GHz), 6 ns pulse response, and 10 MHz video bandwidth ensure accurate envelope tracking during fast AGC transients. ADL5519-EVALZ application notes include step-by-step AGC setup procedures, including loop filter component selection (CLPA/CLPB) and stability margin verification.