AD7863ARSZ-2

Overview

The AD7863ARSZ-2 is a dual-channel, 14-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single 5 V supply and features simultaneous sampling and conversion capabilities for two channels with four total input lines. The device includes an internal 2.5 V reference and a high-speed parallel interface. Key electrical specifications 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. The part supports an input voltage range of 0 V to 2.5 V and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Simultaneous sampling and conversion on two independent channels to preserve relative phase information between signals.
• Integrated track-and-hold amplifiers with tight aperture delay matching across both channels.
• Built-in overvoltage protection on analog inputs to prevent damage during signal excursions.
• Automatic power-down mode that minimizes energy consumption between conversion cycles.

Applications

• Battery-powered or portable instrumentation requiring low power operation.
• Industrial control systems utilizing standard unipolar signal processing ranges.
• Microprocessor, microcontroller, and digital signal processor interfacing via parallel bus.

Procurement Notes

Verify the specific suffix '2' corresponds to the required 0 V to 2.5 V input voltage range before procurement. Confirm package type availability matches the design requirements, as the component is offered in SOIC_W and SSOP formats. Ensure the ordering documentation explicitly references the Analog Devices manufacturer identifier to avoid counterfeit components.

Selection Notes

Select this model when a unipolar 0 V to 2.5 V input range is required rather than bipolar options. Consider the 5.2 μs conversion speed and 175 kSPS throughput rate against system timing constraints. Evaluate the parallel interface complexity against available microprocessor data buses. Verify that the 14-bit resolution meets the dynamic performance needs regarding SNR and THD specifications.

Part Context

This component belongs to the AD7863 series, which serves as a 14-bit lead-compatible upgrade to the AD7862. The series provides dual ADC functionality within a single integrated circuit. The AD7863 family distinguishes itself through simultaneous sampling architecture and LC2MOS fabrication technology, combining precision bipolar circuits with low-power CMOS logic.

Replacement Considerations

The AD7862 is a compatible predecessor offering similar functionality but with lower resolution. Other variants within the AD7863 family, such as the AD7863-10 and AD7863-3, provide different input voltage ranges but share identical pinouts and core architectures.