AD7866ARU-REEL7

Overview

The AD7866ARU-REEL7 is a dual-channel, 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.25 V and supports throughput rates up to 1 MSPS. The device integrates two independent ADCs with track-and-hold amplifiers capable of handling input frequencies exceeding 10 MHz. It features an on-chip 2.5 V reference, flexible power management modes including full shutdown, and a high-speed serial interface compatible with SPI, QSPI, and Microwire standards. The component is housed in a 20-lead TSSOP package.

Feature Summary

• Dual simultaneous sampling and conversion capabilities for two independent channels
• Integrated on-board 2.5 V reference with external reference support options
• Flexible power/throughput rate management with dedicated shutdown mode
• High-speed serial interface compatible with standard microprocessor protocols

Applications

• Industrial process control systems requiring multi-channel data acquisition
• Portable instrumentation utilizing low-power SAR ADC technology
• Data acquisition modules interfacing with DSPs or microcontrollers
• Battery-powered measurement devices requiring efficient power management

Procurement Notes

Verify the specific revision level and temperature grade against project requirements before procurement. Confirm that the 20-lead TSSOP footprint matches the design layout. Ensure supply voltage rails align with the specified 2.7 V to 5.25 V operational range. Check for any obsolescence notices or lifecycle status updates from the manufacturer.

Selection Notes

Select this component when simultaneous dual-channel conversion at 12-bit resolution is required. Consider the internal 2.5 V reference if system accuracy permits; otherwise, utilize the external reference pins for higher precision. Evaluate power consumption needs against the available shutdown modes. Ensure the host processor supports the required serial clock speeds for optimal throughput.

Part Context

This part belongs to the AD7866 family of dual-channel SAR ADCs. It shares architectural similarities with other Analog Devices precision converters but is distinct in its dual-channel configuration and integrated reference buffer. The ARU suffix indicates the specific TSSOP-20 package variant designed for surface-mount assembly.

Replacement Considerations

Direct replacements within the same family include the AD7866BRU. Cross-family comparisons should focus on channel count, resolution, and interface compatibility. Verify pinout compatibility before substituting with other dual-channel ADCs.