AD7858BRZ-REEL

Overview

The AD7858BRZ-REEL is a high-speed, low-power 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It utilizes a Successive Approximation Register (SAR) architecture and operates from a single 3 V to 5.5 V supply. The device features eight single-ended or four pseudo-differential analog inputs with an input range of 0 V to VREF. It supports a maximum throughput rate of 200 kSPS and includes system and self-calibration capabilities. The component communicates via a flexible serial interface compatible with SPI, QSPI, 8051, and µP protocols. It is housed in a 24-lead SOIC package.

Feature Summary

• Integrated system and self-calibration with automatic power-up calibration options.
• Flexible serial interface supporting multiple communication protocols including SPI and QSPI.
• Configurable input multiplexer allowing for eight single-ended or four pseudo-differential channels.
• Automatic power-down mode activated after conversion to minimize energy consumption.

Applications

• Battery-powered systems such as personal digital assistants and mobile communications devices.
• Medical instruments requiring precise signal acquisition.
• Instrumentation and control systems.
• High-speed modems.

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature grade. Ensure compatibility with required voltage levels and interface standards before integration. Confirm RoHS compliance status through current datasheets. Validate that the REEL packaging format aligns with automated assembly requirements.

Selection Notes

Select this component for applications requiring 12-bit resolution at speeds up to 200 kSPS. Consider the AD7858L variant if lower power dissipation is prioritized over maximum sampling speed. Ensure the external reference voltage matches the 0 V to VREF input range requirement. Verify that the serial interface timing constraints meet the microcontroller or processor specifications.

Part Context

The AD7858BRZ-REEL belongs to the AD7858 family of 12-bit SAR ADCs. This series distinguishes between standard speed models and low-power variants. The BRZ suffix indicates a specific commercial temperature grade and lead-free packaging configuration within the 24-lead SOIC form factor. It serves as a bridge between high-speed data acquisition and low-power portable electronics.

Replacement Considerations

The AD7858LARZ is a documented alternative within the same product family offering similar functionality with optimized low-power characteristics.