AD7866ARUZ

Overview

The AD7866ARUZ is a dual-channel, 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.25 V supply and supports throughput rates up to 1 MSPS. The device features two independent ADCs with integrated track-and-hold amplifiers capable of handling input frequencies exceeding 10 MHz. It includes an on-chip 2.5 V reference and offers flexible power management with a shutdown mode consuming 1 µA maximum. The component utilizes a high-speed serial interface compatible with SPI, QSPI, Microwire, and DSP standards. It is housed in a 20-lead TSSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Dual simultaneous sampling and conversion capabilities with separate data outputs or combined serial access.
• Integrated low-noise track-and-hold amplifiers supporting wide bandwidth inputs.
• Flexible power management allowing operation in normal, partial power-down, and full power-down modes.
• On-board 2.5 V reference with options for external reference configuration via REF SELECT pin.

Applications

• Industrial process control systems requiring multi-channel data acquisition.
• Portable instrumentation utilizing single-supply operation.
• Battery-powered measurement devices benefiting from low power consumption.
• Automotive sensor signal conditioning applications.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with system voltage levels for AVDD, DVDD, and VDRIVE. Confirm that the required throughput rate aligns with the specified SCLK frequency limits. Check for availability through authorized distributors as stock status varies. Validate RoHS compliance requirements for the target assembly process.

Selection Notes

Select this component when dual-channel simultaneous sampling is required at 12-bit resolution. Consider the 2.7 V to 5.25 V supply range for single-supply designs. Evaluate the need for internal versus external reference sources based on system accuracy requirements. Assess power constraints to determine if sleep modes are necessary for battery life extension. Verify interface compatibility with the host microprocessor or DSP controller.

Part Context

The AD7866 belongs to the AD7866 series of dual-channel SAR ADCs from Analog Devices. It shares architectural similarities with other members of the family but is distinguished by its specific 1 MSPS throughput and 12-bit resolution. The ARUZ suffix indicates the A-grade version packaged in a 20-lead Thin Shrink Small Outline (TSSOP). This part is designed for applications demanding high speed and low power in a compact form factor.

Replacement Considerations

AD7866BRUZ