AD7858LARZ-REEL

Overview

The AD7858LARZ-REEL is an 8-channel, 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 3 V to 5.5 V supply and features a throughput rate of 100 kSPS. The device includes an internal 2.5 V reference, system calibration capabilities, and flexible serial interface compatibility with SPI/QSPI/8051 protocols. It is housed in a 24-lead SOIC package.

Feature Summary

• Supports eight single-ended or four pseudo-differential analog input channels via an integrated multiplexer.
• Includes self-calibration and system calibration functions to maintain accuracy over temperature variations.
• Features automatic power-down modes to minimize energy consumption during idle periods.

Applications

• Battery-powered personal digital assistants
• Medical instrumentation systems
• Mobile communications devices

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the L-grade designation corresponds to the 100 kSPS low-power variant rather than the standard speed version. Ensure the SOIC-24 package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component for applications requiring low power dissipation at 100 kSPS compared to the higher-speed AD7858. Consider the 12-bit resolution and 8-channel multiplexing capability for multi-sensor data acquisition. Verify that the serial interface timing meets the microcontroller's clock constraints for reliable data transfer.

Part Context

This part belongs to the AD7858 family of high-speed, low-power sampling ADCs. The 'L' suffix denotes the low-power optimized version with a 100 kSPS throughput rate, while the 'AR' indicates the SOIC package type. The 'REEL' suffix specifies the bulk packaging format for automated assembly processes.

Replacement Considerations

The AD7858BRZ serves as a direct functional replacement within the same package and performance class. The AD7858LANZ offers identical specifications but utilizes a PDIP package instead of surface mount. Verify pinout compatibility and thermal characteristics when substituting these variants.