AD7863AR-2REEL7

Overview

The AD7863AR-2REEL7 is a dual 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 analog inputs. The device supports an input voltage range of 0 V to 2.5 V, utilizing straight binary output coding. Key electrical parameters include a maximum conversion time of 5.2 μs, a typical power dissipation of 70 mW in normal mode, and a maximum power consumption of 105 μW in power-down mode. It incorporates an internal 2.5 V reference and provides overvoltage protection up to +7 V on the analog inputs.

Feature Summary

• Simultaneous sampling and conversion of two independent channels
• Internal 2.5 V precision reference with external reference capability
• High-speed parallel interface compatible with standard microprocessors
• Automatic power-down mode for low-power operation

Applications

• Battery-powered or portable applications requiring low power consumption
• Systems preserving relative phase information between signals
• Microprocessor and digital signal processor interfacing

Procurement Notes

Verify the specific suffix REEL7 indicates tape and reel packaging when sourcing this component. Confirm that the -2 designation corresponds to the 0 V to 2.5 V unipolar input range required for your application. Ensure compatibility with the 28-lead SOIC_W package dimensions during PCB layout planning.

Selection Notes

Select the AD7863AR-2REEL7 when a 14-bit resolution and simultaneous dual-channel sampling are necessary. This part is suitable for applications requiring a 0 V to 2.5 V input range. Consider the 5.2 μs conversion speed and 175 kSPS throughput rate against system timing requirements. Evaluate the need for the internal reference versus an external precision source based on gain error specifications.

Part Context

The AD7863 series serves as a 14-bit lead-compatible upgrade to the AD7862. The AD7863AR-2REEL7 variant specifically addresses unipolar signal processing needs within the broader family of dual ADCs offered by Analog Devices. It utilizes the LC2MOS process to combine precision bipolar circuits with low-power CMOS logic.

Replacement Considerations

The AD7863AR-3Z and AD7863AR-10Z are direct pin-compatible alternatives offering ±2.5 V and ±10 V input ranges respectively. Verify that the input voltage range matches the system requirements before substituting these variants.