AD7863ARZ-3

Overview

The AD7863ARZ-3 is a dual-channel, 14-bit successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates on a single 5 V supply and provides simultaneous sampling and conversion at a throughput rate of 175 kSPS. The device features four analog inputs grouped into two channels with an input voltage range of ±2.5 V. Key specifications include a typical power consumption of 70 mW in normal mode and a maximum of 105 μW in power-down mode. It utilizes a high-speed parallel interface for data transfer.

Feature Summary

• Simultaneous sampling and conversion across two independent channels to preserve relative phase information.
• Integrated internal 2.5 V reference voltage source with external reference capability.
• Automatic power-down mode that activates after conversion completion to minimize energy usage.
• Analog input overvoltage protection allowing tolerance up to ±7 V without damage.

Applications

• Battery-powered or portable instrumentation systems requiring low power consumption.
• Industrial control applications utilizing standard ±2.5 V signal processing ranges.
• Data acquisition systems interfacing with microprocessors, microcontrollers, or DSPs via parallel bus.

Procurement Notes

Verify the specific suffix '-3' corresponds to the ±2.5 V input range variant when sourcing. Confirm package availability in SOIC-28 format. Ensure compatibility with 5 V logic levels for the parallel interface signals. Check for RoHS compliance documentation if required by local regulations.

Selection Notes

Select this component when simultaneous multi-channel sampling is critical for phase accuracy. Choose the AD7863ARZ-3 specifically for bipolar ±2.5 V input requirements. Consider the AD7863-10 for ±10 V industrial ranges or the AD7863-2 for unipolar 0 V to 2.5 V applications. Evaluate the 175 kSPS throughput against system timing constraints.

Part Context

This part belongs to the AD7863 family of dual 14-bit ADCs. It serves as a lead-compatible upgrade to the AD7862, offering enhanced performance while maintaining pin compatibility. The series includes variants differentiated primarily by their analog input voltage ranges and temperature grades.

Replacement Considerations

The AD7862 is a compatible predecessor with similar functionality but lower resolution. Verify pinout compatibility during substitution. Other AD7863 variants (-10, -2) share the same package and interface but differ in input range specifications.