AD7863ARS-3

Overview

The AD7863ARS-3 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 of two channels with four total input lines. The device includes an internal 2.5 V reference and a high-speed parallel interface. Key electrical parameters include a conversion time of 5.2 μs, a maximum throughput rate of 175 kSPS, and typical power consumption of 70 mW in normal mode. The AD7863-3 variant supports a bipolar ±2.5 V input range with overvoltage protection up to ±7 V.

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.
• High-speed parallel data interface compatible with standard microprocessor control signals.

Applications

• Vector motor control systems requiring precise phase measurement.
• Industrial signal processing applications utilizing standard ±2.5 V input ranges.
• Portable or battery-powered equipment benefiting from automatic power-down modes.

Procurement Notes

Verify the specific suffix 'ARS-3' against the manufacturer's current ordering guide to confirm package type and temperature grade. Ensure the selected component matches the required ±2.5 V input range specification. Cross-reference the datasheet revision to validate performance parameters against your design requirements.

Selection Notes

Select this component when simultaneous sampling of two channels is critical for phase-sensitive applications. Choose the AD7863-3 variant specifically for ±2.5 V input signals. Consider the 14-bit resolution and 175 kSPS throughput if higher speed or precision is not required. Evaluate the parallel interface requirements against the host processor capabilities.

Part Context

The AD7863 serves as a 14-bit upgrade to the 12-bit AD7862 family while maintaining pin compatibility. It utilizes Linear Compatible CMOS (LC2MOS) technology to combine precision bipolar circuits with low-power CMOS logic. The device is available in 28-lead SOIC_W and SSOP packages.

Replacement Considerations

The AD7862 is a 12-bit predecessor with similar functionality but lower resolution. Verify that the increased resolution and specific input range of the AD7863-3 meet the system requirements before substituting.