AD7858LBR-REEL

Overview

The AD7858LBR-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 track-and-hold amplifier with a 400 ns acquisition time and supports eight single-ended or four pseudo-differential inputs. It utilizes a flexible serial interface compatible with SPI, QSPI, and 8051 protocols. The component is housed in a 24-lead SOIC package and incorporates system and self-calibration capabilities to maintain accuracy over temperature variations.

Feature Summary

• Low-power architecture optimized for battery-operated applications
• Integrated automatic calibration on power-up
• Flexible serial communication interface supporting multiple protocols
• Automatic power-down mode after conversion

Applications

• Battery-powered systems such as personal digital assistants and medical instruments
• Pen computers
• Instrumentation and control systems
• High-speed modems

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and reel specifications. Ensure compatibility with existing board layouts regarding pin configurations and thermal requirements. Cross-reference part numbers with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this model when low power consumption is prioritized over maximum sampling speed compared to the standard AD7858 variant. Verify that the 100 kSPS throughput rate meets system timing requirements. Confirm that the 12-bit resolution and input voltage ranges align with sensor signal characteristics. Check package availability for surface-mount assembly processes.

Part Context

This component belongs to the AD7858 family of high-speed, low-power ADCs. The 'L' designation indicates the low-power version optimized for reduced energy dissipation while maintaining 12-bit resolution. The 'BR' suffix typically denotes the SOIC package and tape-and-reel shipping format, distinguishing it from DIP or tube-packaged variants within the same product line.

Replacement Considerations

The AD7858LARZ is a confirmed substitute offering identical functionality in the same package type. Designers should verify pinout compatibility and electrical specifications when transitioning between these part numbers.