AD7865ASZ-1REEL

Overview

The AD7865ASZ-1REEL 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 ±5 V and ±10 V, offering overvoltage protection on analog inputs. It utilizes a high-speed parallel interface compatible with 3 V processors and includes an internal 2.5 V reference and clock oscillator. Key performance metrics include a maximum throughput of 350 kSPS per channel or 100 kSPS for all four channels, a typical power dissipation of 115 mW in normal mode, and an operating temperature range of -40°C to +85°C.

Feature Summary

• Four simultaneously sampled inputs preserve relative phase information across channels
• Hardware or software selectable channel conversion sequences optimize throughput rates
• Integrated overvoltage protection allows analog inputs to withstand voltages beyond the selected range without damage
• Low power consumption with a dedicated standby mode significantly reducing energy usage

Applications

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

Procurement Notes

Verify that the ordering suffix REEL indicates tape-and-reel packaging rather than tray packaging when sourcing components. Confirm the ASZ variant corresponds to the specified accuracy grade and lead-free compliance requirements for your specific manufacturing process. Ensure compatibility with the required input voltage ranges before finalizing procurement orders.

Selection Notes

Select the AD7865ASZ-1REEL specifically for applications requiring bipolar input ranges of ±5 V or ±10 V. Choose this model over the -2 or -3 variants if unipolar or ±2.5 V ranges are not sufficient for the signal conditioning needs. Consider the parallel interface requirements and ensure the host system can accommodate the 44-lead PQFP package footprint and pin configuration.

Part Context

This component belongs to the AD7865 family of four-channel simultaneous sampling ADCs. The AD7865 series is designed for high-speed data acquisition where phase coherence between multiple analog channels is critical. The -1 suffix denotes the specific version supporting standard industrial bipolar input ranges, distinguishing it from unipolar or narrow-range alternatives within the same product line.

Replacement Considerations

Direct replacements within the AD7865 family include the AD7865BSZ-1REEL for tighter accuracy specifications or the AD7865YSZ-1REEL for extended temperature ranges. Verify pinout compatibility and electrical parameter alignment when substituting these variants.