Analog Devices Inc. AD6645-80/PCBZ

Overview

AD6645-80/PCBZ from Analog Devices is a 14-bit, 80 MSPS analog-to-digital converter (ADC) designed for high-fidelity IF sampling in multichannel receivers. It delivers 75 dB SNR at 15 MHz input, 89 dBc SFDR at 70 MHz, and 0.1 ps rms aperture jitter, with differential analog inputs, 3.3 V CMOS-compatible digital outputs, and operation from −40°C to +85°C. It is used in 3G base station IF digitization and antenna array processing.

For engineers reviewing the AD6645-80/PCBZ datasheet, AD6645-80/PCBZ pinout, AD6645-80/PCBZ application, or AD6645-80/PCBZ equivalent, this evaluation board enables rapid validation of ADC performance under real-world RF front-end conditions-including wideband IF sampling up to 200 MHz, multitone SFDR testing, and timing-critical data capture with DRY-synchronized latching.

Technical Context

The AD6645-80/PCBZ is an evaluation platform for the AD6645ASQ-80 monolithic ADC, built on Analog Devices' XFCB process and featuring a multipass architecture with integrated track-and-hold and internal 2.4 V reference. It supports differential encode clocking and provides buffered analog input paths optimized for impedance matching to 50 Ω sources.

This PCBZ board implements full signal-chain conditioning: low-noise power regulation (AVCC = 5 V, DVCC = 3.3 V), precision bypassing (0.1 µF microwave capacitors on C1/C2/VREF), exposed-pad thermal management, and termination-matched analog input traces. It does not include on-board clock generation but accepts differential LVPECL/LVDS/CMOS encode signals via SMA connectors.

Key Specifications

Availability

AD6645-80/PCBZ is available at Aetrix Electronics and suitable for RF receiver development, 3G/4G infrastructure prototyping, and instrumentation design requiring stable component supply and traceable evaluation hardware.

Supply support for AD6645-80/PCBZ 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 technologies, headquartered in Norwood, MA.

The AD6645-80/PCBZ belongs to Analog Devices' SoftCell® transceiver chipset evaluation platform family, engineered specifically for rapid development of software-defined radio (SDR) and multimode digital receivers.

FAQ

What is the AD6645-80/PCBZ used for?

The AD6645-80/PCBZ is an evaluation board designed to validate the performance of the AD6645ASQ-80 14-bit, 80 MSPS ADC in real-world IF sampling applications. It provides calibrated analog input paths, regulated dual-supply rails, and accessible digital outputs to enable accurate measurement of SNR, SFDR, and timing margins without custom PCB development. Engineers use AD6645-80/PCBZ to verify system-level integration before committing to production layout.

Does the AD6645-80/PCBZ include a clock source?

No, the AD6645-80/PCBZ does not include an onboard clock generator. It accepts external differential encode signals (ENCODE/ENCODE) via SMA connectors, supporting LVPECL, LVDS, or CMOS logic levels. Users must provide a low-jitter clock source synchronized to their analog signal chain; the board routes the encode signal with controlled impedance and minimal skew to meet the AD6645's 0.1 ps rms jitter requirement.

Can the AD6645-80/PCBZ be used with the AD6645-105 ADC?

No - the AD6645-80/PCBZ is specifically designed and characterized for the AD6645ASQ-80 variant (80 MSPS, −40°C to +85°C). While pin-compatible with the AD6645ASQ-105, the board's power delivery, thermal layout, and signal integrity are optimized for 80 MSPS operation and its associated current draw (IAVCC = 320 mA typ.) and junction temperature limits. Using it with the 105 MSPS version may exceed thermal or timing margins without revalidation.

How is analog input termination handled on the AD6645-80/PCBZ?

The AD6645-80/PCBZ provides 50 Ω single-ended termination at each SMA input connector, with internal differential routing to the AD6645's AIN/AIN pins. The analog path includes AC coupling, transformer-based balun interface (or direct differential drive option), and matched-length microstrip traces. Input voltage range is set to 2.2 V p-p differential per the AD6645 datasheet, and the board includes test points for probing common-mode and differential signals pre-ADC.

Is the AD6645-80/PCBZ RoHS compliant and lead-free?

Yes - the AD6645-80/PCBZ conforms to RoHS Directive 2011/65/EU and uses lead-free solder paste and surface finishes. All passive components, connectors, and the AD6645ASQ-80 IC itself are marked as lead-free per Analog Devices' packaging standards. The board documentation (UG-032 user guide) confirms compliance, and material declarations are available through Analog Devices' product page for AD6645-80/PCBZ.