AD7865ASZ-2

Overview

The AD7865ASZ-2 is a four-channel, simultaneous sampling, fast, 14-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single +5 V supply and features a successive approximation architecture with four track/hold amplifiers. The device supports input ranges of 0 V to 2.5 V and 0 V to 5 V, utilizing straight binary output coding. Key electrical parameters include a maximum throughput of 350 kSPS per channel and 100 kSPS for all four channels. It offers a typical power dissipation of 100 mW in normal mode and 15 µW in standby mode. The component is housed in a 44-lead PQFP package.

Feature Summary

• Four simultaneously sampled inputs preserve relative phase information across channels.
• Hardware or software selectable channel conversion sequences optimize throughput rates.
• High-speed parallel interface facilitates direct connection to microprocessors and DSPs.
• Analog inputs feature overvoltage protection to prevent damage during signal excursions.

Applications

• AC Motor Control
• Uninterruptible Power Supplies
• Industrial Power Meters/Monitors
• Data Acquisition Systems

Procurement Notes

Verify the specific suffix designation against the manufacturer's ordering guide to confirm the analog input voltage range and accuracy grade. Ensure that the procurement documentation explicitly references the AD7865ASZ-2 part number to distinguish it from other variants within the AD7865 family. Confirm RoHS compliance status through official datasheets or supplier certificates prior to finalizing acquisition.

Selection Notes

Select the AD7865ASZ-2 when unipolar input signals within the 0 V to 5 V range require high-speed simultaneous sampling. Consider this component for applications demanding tight aperture delay matching between channels. Evaluate the 14-bit resolution and parallel interface requirements against system bus capabilities. Verify that the single 5 V supply constraint aligns with the target power architecture.

Part Context

The AD7865 series comprises four-channel, 14-bit simultaneous sampling ADCs designed for high-performance data acquisition. The AD7865ASZ-2 variant specifically targets unipolar signal processing applications. It belongs to a family offering bipolar and alternative unipolar input ranges. The device integrates an internal reference and clock oscillator to simplify circuit design while maintaining low power consumption characteristics suitable for portable systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices for current equivalent components or updated product line replacements if discontinuation occurs.