AD7863ARS-2

Overview

The AD7863ARS-2 is a dual-channel, 14-bit successive approximation analog-to-digital converter manufactured by Analog Devices. It operates from a single 5 V supply and features simultaneous sampling of two channels with four total input lines. The device provides a 0 V to 2.5 V unipolar input range and includes an internal 2.5 V reference. Key electrical parameters include a maximum conversion time of 5.2 μs, a typical power consumption of 45 mW in normal mode, and a maximum power dissipation of 57.75 mW at 5.25 V. It supports throughput rates up to 175 kSPS and utilizes a high-speed parallel interface.

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.
• Built-in 2.5 V reference source with option for external reference connection.
• Automatic power-down mode that activates after conversion completion.

Applications

• Battery-powered or portable applications requiring low power consumption.
• Systems interfacing with microprocessors, microcontrollers, and digital signal processors.
• Applications requiring preservation of relative phase information between analog signals.

Procurement Notes

Verify the specific suffix 'ARS-2' against the manufacturer's current ordering guide to confirm package type and temperature grade. Ensure the design accommodates the 0 V to 2.5 V unipolar input range specified for this variant. Confirm pinout compatibility if replacing legacy components like the AD7862.

Selection Notes

Select this component when a dual-channel 14-bit ADC with simultaneous sampling is required. The AD7863ARS-2 is specifically suited for unipolar signal conditioning applications within the 0 V to 2.5 V range. Consider the 5.2 μs conversion time and parallel interface requirements when designing the system timing and bus architecture.

Part Context

The AD7863 series serves as a 14-bit lead-compatible upgrade to the AD7862. It is fabricated using Analog Devices' linear compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low-power CMOS logic. The device is available in 28-lead SOIC_W and SSOP packages.

Replacement Considerations

The AD7863 is designed as a direct pin-compatible replacement for the AD7862. Verify that the existing application supports the 14-bit resolution and simultaneous sampling capabilities of the AD7863 over the previous generation.