Analog Devices Inc. ADL6317-EVALZ

Overview

ADL6317-EVALZ from Analog Devices is an evaluation board designed to characterize the ADL6317 transmit variable gain amplifier (VGA) for RF DAC and transceiver interface applications in 1500–3000 MHz systems. It supports full SPI programmability, enables VVA and DSA attenuation testing (20.5 dB and 15.5 dB ranges), and provides differential 50 Ω input / single-ended 50 Ω output matching for LTE FDD/TDD base station transmitter signal chains.

For engineers reviewing the ADL6317-EVALZ datasheet, ADL6317-EVALZ setup guide, ADL6317-EVALZ layout recommendations, or ADL6317-EVALZ power supply requirements, this page delivers verified hardware configuration details, measurement-ready test points, thermal management guidance, and SPI interface validation procedures specific to the ADL6317 VGA IC evaluation platform.

Technical Context

The ADL6317-EVALZ implements a complete RF signal chain interface: it routes differential RF inputs (IN_P/IN_N) through the ADL6317's integrated balun, applies programmable gain control via on-chip 12-bit DAC-driven VVA and 5-bit DSA, and delivers a single-ended 50 Ω RFOUT signal optimized for PA driver stages. All digital control-including register writes to 0x102, 0x103, 0x104, and 0x105-is accessible via standard 4-wire SPI headers with 1.8 V/3.3 V logic level support.

Thermal design centers on the ADL6317's exposed pad (EPAD1/EPAD2), requiring direct PCB ground connection and copper pour for junction-to-ambient thermal resistance (θJA = 21.4°C/W). Power delivery uses dual 5 V analog supplies (V50AMP1/V50AMP2) decoupled with 10 pF + 0.1 µF capacitors, plus V33FUSE bypassed with 0.1 µF + 1 µF caps-per Figure 39 and Table 8 of the ADL6317 datasheet Rev. B.

Key Specifications

Availability

ADL6317-EVALZ is available at Aetrix Electronics and suitable for LTE FDD/TDD base station development, RF DAC interface validation, and high-linearity transmitter design requiring stable component supply, repeatable RF performance characterization, and SPI-controlled gain optimization.

Supply support for ADL6317-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 (DSP) technologies, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.

The ADL6317-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, engineered specifically to accelerate development of wideband transmit signal chains for cellular infrastructure, where precise gain control, low distortion, and thermal stability across 1500–3000 MHz are critical.

FAQ

What is the primary function of the ADL6317-EVALZ?

The ADL6317-EVALZ is an evaluation board purpose-built to validate and characterize the ADL6317 transmit VGA IC. It provides full access to all ADL6317 pins-including IN_P/IN_N, RFOUT, VVA_ANALOG, and SPI signals-enabling engineers to measure gain flatness, OIP3, noise figure, and settling time across its 1500–3000 MHz operating band while exercising both VVA and DSA attenuation modes. The ADL6317-EVALZ does not contain the ADL6317 IC itself but is shipped populated with it.

Does the ADL6317-EVALZ support both internal DAC and external analog control of the VVA?

Yes, the ADL6317-EVALZ fully supports both VVA control methods. Internal control uses the ADL6317's integrated 12-bit DAC via SPI registers 0x104 and 0x103 (as defined in Figure 38 and Table 7 of the ADL6317 datasheet Rev. B); external control applies a 0–3.6 V analog voltage to the VVA_ANALOG pin (Pin 30), which is accessible via test point TP30 on the evaluation board. Both paths are validated in the ADL6317-EVALZ schematic and layout.

What power supply requirements must be met to operate the ADL6317-EVALZ?

The ADL6317-EVALZ requires two clean, low-noise 5 V analog supplies (for V50AMP1 and V50AMP2), each decoupled with 10 pF and 0.1 µF capacitors placed adjacent to Pins 13 and 17 per Figure 39. A third supply-3.3 V for V33FUSE-must be bypassed with 0.1 µF and 1 µF capacitors. Total supply current ranges from 6 mA (power-down) to 435 mA (high-performance mode), as specified in the ADL6317 datasheet.

How is thermal management implemented on the ADL6317-EVALZ?

Thermal management on the ADL6317-EVALZ centers on the ADL6317's EPAD1 and EPAD2, which are internally connected and must be soldered to a large, low-impedance GND plane on the PCB. This achieves the specified θJA of 21.4°C/W (JEDEC-compliant) and prevents junction temperature exceedance beyond +125°C. The evaluation board layout includes thermal vias under the ADL6317 footprint and recommends airflow or heatsinking for continuous high-power operation.

Can the ADL6317-EVALZ be used to evaluate multi-carrier LTE signals?

Yes-the ADL6317-EVALZ is explicitly validated for multicarrier LTE FDD/TDD applications. Its RF path supports >40 dBc HD2/HD3 suppression (e.g., −82.1 dBc HD2 at 1850 MHz) and maintains OIP3 ≥34.5 dBm across 1500–3000 MHz, enabling accurate adjacent channel leakage ratio (ACLR) and error vector magnitude (EVM) measurements on 20 MHz+ bandwidth signals. The ADL6317-EVALZ's impedance-matched layout minimizes signal integrity degradation critical for wideband modulation.