Analog Devices Inc. AD8315-EVAL

Overview

AD8315-EVAL from Analog Devices is an evaluation board designed to characterize and prototype the AD8315 50 dB RF power controller IC for GSM/EDGE transmitter power control. It supports full-frequency operation from 0.1 GHz to 2.5 GHz, delivers ±1 dB log conformance across a −44 dBm to +2 dBm input range, and enables direct VAPC output interfacing with PA gain control pins. The board facilitates rapid validation of closed-loop APC performance in mobile handset RF front-ends.

For engineers reviewing the AD8315-EVAL datasheet, AD8315-EVAL setup procedure, AD8315-EVAL test configuration, or AD8315-EVAL RF calibration workflow, this evaluation platform provides verified signal routing, on-board 220 pF filter capacitor (FLTR), calibrated 52.3 Ω RFIN termination, and accessible VSET/VAPC/ENBL nodes for real-time loop tuning, transient response measurement, and temperature-stable slope/intercept verification per Rev. D specifications.

Technical Context

The AD8315-EVAL implements the functional block diagram of the AD8315 IC-including its five-stage detector chain, current-mode error summation, FLTR integrator node, and rail-to-rail VAPC buffer-with precise layout to preserve high-frequency signal integrity up to 2.5 GHz. It replicates the exact biasing, decoupling (0.1 µF VPOS), and grounding scheme specified for MSOP and LFCSP packages in the AD8315 datasheet.

All critical interfaces are brought out to SMA connectors or test points: RFIN accepts RF input via 50 Ω path with internal 52.3 Ω termination; VSET accepts 0.25 V–1.4 V setpoint voltage; ENBL enables/disables the AD8315 core; and VAPC drives external PAs with up to 6 mA load capability. The board includes no active components beyond the AD8315 IC itself.

Key Specifications

Availability

AD8315-EVAL is available at Aetrix Electronics and suitable for RF power amplifier characterization, GSM/EDGE transmitter calibration, and closed-loop APC algorithm development requiring stable component supply and traceable evaluation hardware.

Supply support for AD8315-EVAL 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial applications.

The AD8315-EVAL belongs to Analog Devices' RF & Microwave Evaluation Platform family, engineered to accelerate design-in of RF detector and power control ICs in cellular infrastructure and mobile handset applications.

FAQ

What is the primary function of the AD8315-EVAL evaluation board?

The AD8315-EVAL evaluation board is a dedicated platform for prototyping and validating the AD8315 RF power controller IC. It provides fully routed, impedance-matched access to all key signals-RFIN, VSET, ENBL, VAPC, and FLTR-to enable accurate measurement of log conformance, loop stability, transient response, and temperature drift per the AD8315 datasheet Rev. D. The board contains no additional active circuitry beyond the AD8315 IC itself.

Which AD8315 package variants does the AD8315-EVAL support?

The AD8315-EVAL board supports both the 8-lead MSOP and 8-lead LFCSP package variants of the AD8315 IC. Its footprint accommodates either package type with appropriate solder mask and thermal pad layout per Figures 2 and 3 in the AD8315 datasheet. The exposed paddle of the LFCSP version must be soldered to a low-impedance ground plane as specified in the pin description table.

Does the AD8315-EVAL include on-board filtering for the FLTR pin?

Yes, the AD8315-EVAL includes a 220 pF capacitor mounted between the FLTR pin and COMM (ground), matching the recommended integrator value shown in Figure 27 of the AD8315 datasheet. This capacitor establishes the dominant pole in the control loop and is essential for achieving stable closed-loop behavior when using the AD8315 in automatic power control applications.

Can the AD8315-EVAL operate across the full 0.1 GHz to 2.5 GHz frequency range of the AD8315 IC?

Yes, the AD8315-EVAL maintains signal integrity and measurement accuracy across the entire 0.1 GHz to 2.5 GHz range. Its RFIN path uses controlled-impedance microstrip routing, 52.3 Ω termination, and SMA connector interface optimized per the AD8315's input impedance profile (Figure 12). Performance curves in the datasheet (Figures 4–9, 16–19) were generated using this evaluation platform or equivalent setups.

What supply voltage range is supported by the AD8315-EVAL board?

The AD8315-EVAL supports the full AD8315 supply range of 2.7 V to 5.5 V DC applied to the VPOS pin. On-board decoupling uses a 0.1 µF ceramic capacitor as specified in the "Basic Connections" section (page 16) of the AD8315 datasheet. Quiescent current draw is 8.5 mA at 2.7 V, scaling to ~10.7 mA at 5 V, consistent with Table 1 specifications.