AD7863ARSZ-3

Overview

The AD7863ARSZ-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 selectable input ranges: ±2.5 V for the -3 suffix variant. Key specifications include a 5.2 μs conversion time, 70 mW typical power consumption in normal mode, and an internal 2.5 V reference. It utilizes a high-speed parallel interface and offers overvoltage protection up to ±7 V.

Feature Summary

• Simultaneous sampling and conversion across two independent channels to preserve relative phase information.
• Integrated internal 2.5 V voltage reference with external reference capability.
• High-speed parallel data interface compatible with standard microprocessors and DSPs.
• Automatic power-down mode for reduced energy consumption during idle periods.

Applications

• Vector motor control systems requiring precise phase tracking.
• Industrial process control applications utilizing standard signal ranges.
• Portable instrumentation powered by battery supplies.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm the analog input range specification. Ensure that the package type matches the target PCB footprint requirements. Confirm compliance with relevant environmental directives such as RoHS before finalizing procurement orders.

Selection Notes

Select this component when simultaneous multi-channel acquisition is required without aperture delay mismatch. Choose the -3 suffix specifically for applications requiring a ±2.5 V bipolar input range. Consider the parallel interface complexity versus serial alternatives based on system bus architecture 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 model. The family includes variants with different input ranges, distinguished by their ordering suffixes, allowing flexibility for various industrial signal conditioning needs.

Replacement Considerations

The AD7862 is a compatible predecessor offering similar functionality. Verify pin compatibility and ensure that the input range specifications of the replacement match the original design requirements.