AD7863AR-2REEL

Overview

The AD7863AR-2REEL is a dual 14-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, operating on a single 5 V supply. It features two simultaneous sampling channels with four input terminals (VA1, VA2, VB1, VB2). The device supports an unipolar input range of 0 V to 2.5 V and includes an internal 2.5 V reference. Key electrical parameters include a maximum conversion time of 5.2 μs, a throughput rate up to 175 kSPS, and typical power consumption of 45 mW in normal mode. It utilizes a high-speed parallel interface for data transfer.

Feature Summary

• Simultaneous sampling and conversion of two independent channels to preserve relative phase information.
• Integrated track-and-hold amplifiers with tight aperture delay matching between channels.
• Internal 2.5 V voltage reference with option for external reference connection.
• Automatic power-down mode that activates after conversion completion to minimize energy usage.

Applications

• Battery-powered or portable instrumentation requiring low power consumption.
• Data acquisition systems needing simultaneous multi-channel signal capture.
• Industrial control applications utilizing standard microprocessors or DSPs via parallel interface.

Procurement Notes

Verify the specific suffix REEL indicates tape and reel packaging when sourcing this component. Confirm the -2 designation corresponds to the 0 V to 2.5 V unipolar input range required by your circuit design. Ensure compatibility with the 28-lead SOIC_W package dimensions during PCB layout planning.

Selection Notes

Select this model specifically for unipolar 0 V to 2.5 V input applications. For bipolar ±2.5 V inputs, use the AD7863-3 variant. For ±10 V inputs, use the AD7863-10 variant. Ensure the system requires a parallel interface rather than serial options available in other ADC families.

Part Context

This component belongs to the AD7863 family of dual 14-bit ADCs. It serves as a lead-compatible upgrade to the AD7862, offering improved performance while maintaining similar form factors. The family distinguishes itself through simultaneous sampling capabilities and low power operation suitable for portable electronics.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD7863AR-3REEL for ±2.5 V ranges and AD7863AR-10REEL for ±10 V ranges. Verify input voltage requirements before substituting, as input scaling circuits differ significantly between these variants.