AD7866ARU

Overview

The AD7866ARU 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, each preceded by a low-noise track-and-hold amplifier capable of handling input frequencies exceeding 10 MHz. It features an on-chip 2.5 V reference, flexible power management with shutdown modes, and a high-speed serial interface compatible with SPI/QSPI/MICROWIRE standards. The component is housed in a 20-lead TSSOP package.

Feature Summary

• Dual simultaneous sampling and conversion capabilities for two channels
• Integrated 2.5 V internal reference with external reference support options
• Flexible power/throughput rate management including sleep and full power-down modes
• No pipeline delay with accurate sampling control via CS input

Applications

• Data acquisition systems requiring simultaneous multi-channel sampling
• Industrial process control applications
• Medical instrumentation
• Battery-powered portable devices

Procurement Notes

Verify the specific ordering suffix RU corresponds to the 20-lead Thin Shrink Small Outline (TSSOP) package when sourcing components. Confirm that the temperature range matches the A or B version specifications (-40°C to +125°C). Ensure compatibility with system voltage requirements between 2.7 V and 5.25 V for both AVDD and DVDD supplies before finalizing procurement.

Selection Notes

Select the AD7866ARU when dual-channel simultaneous sampling at 12-bit resolution is required. Consider this part for designs needing low power consumption at high throughput rates. Verify that the serial interface timing aligns with the microprocessor or DSP clock speeds. Check if the integrated 2.5 V reference meets system accuracy requirements or if an external reference configuration is necessary.

Part Context

The AD7866 belongs to Analog Devices' family of high-speed, low-power SAR ADCs. It is designed for applications demanding precise data conversion with minimal latency. The dual-channel architecture allows for cost-effective implementation in systems requiring synchronized measurements from multiple sensors without the need for external multiplexing circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.