AD7863ARS-10

Overview

The AD7863ARS-10 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 supports simultaneous sampling at a rate of 175 kSPS with a conversion time of 5.2 μs. The device features four analog input channels grouped into two selectable pairs via the A0 pin, accommodating an input voltage range of ±10 V. It includes an internal 2.5 V reference, high-speed parallel interface, and overvoltage protection up to ±17 V on analog inputs.

Feature Summary

• Simultaneous sampling and conversion for two independent channels
• Internal 2.5 V reference with external reference capability
• High-speed parallel data interface compatible with standard microprocessors
• Automatic power-down mode for reduced energy consumption

Applications

• Vector motor control systems requiring phase-preserving signal acquisition
• Industrial process control applications utilizing standard ±10 V signals
• Portable or battery-powered instrumentation due to low-power operation

Procurement Notes

Verify the specific suffix 'ARS-10' against the manufacturer's current ordering guide, as official documentation primarily lists 'AD7863-10'. Confirm package availability in SOIC_W or SSOP formats. Ensure compatibility with existing PCB footprints and verify that the component meets required environmental specifications for the intended operating temperature range.

Selection Notes

Select this component when simultaneous sampling of two channels is critical to preserve relative phase information. Choose the -10 variant specifically for applications requiring a ±10 V input range. Consider the parallel interface requirements and ensure the host system can support the necessary timing constraints for the 14-bit data bus and control signals.

Part Context

The AD7863 serves as a 14-bit lead-compatible upgrade to the AD7862. It utilizes Linear Compatible CMOS (LC2MOS) technology to combine precision bipolar circuits with low-power CMOS logic. This architecture enables high-speed performance while maintaining low power dissipation typical of 5 V single-supply operations.

Replacement Considerations

The AD7862 is a documented predecessor offering 12-bit resolution at 250 kSPS. Verify if the increased resolution of the AD7863 is required or if the higher speed of the AD7862 better suits the application throughput needs.