AD7853ARS-REEL

Overview

The AD7853ARS-REEL is a 12-bit successive approximation analog-to-digital converter manufactured by Analog Devices Inc. It operates on a single 3 V to 5.5 V supply and supports a throughput rate of 200 kSPS. The device features a pseudo-differential input range from 0 V to VREF, with an internal reference voltage of 2.5 V. Normal mode power dissipation is typically 12 mW at 3 V. It includes system and self-calibration capabilities with automatic calibration upon power-up. The component utilizes a flexible serial interface compatible with SPI, QSPI, and 8051 protocols. It is housed in a 24-lead SSOP package.

Feature Summary

• Integrated self-calibration and system calibration mechanisms ensure operational accuracy across varying temperatures and timeframes.
• Flexible serial communication interface supporting multiple standard protocols including SPI, QSPI, and microprocessor modes.
• Automatic power-down functionality activates immediately following conversion cycles to minimize energy consumption.
• On-chip control registers allow for software-configurable operation modes without requiring external initialization.

Applications

• Battery-powered personal digital assistants
• Medical instrumentation systems
• Mobile communications devices
• Pen computers
• High-speed modems

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature grade. Ensure that the REEL designation aligns with required manufacturing handling procedures. Cross-reference the revision level with current datasheets to validate pinout compatibility and electrical specifications before integration into production designs.

Selection Notes

Select this component when a 12-bit resolution and 200 kSPS sampling rate are required within a single-supply environment. Consider the AD7853L variant if lower power consumption is prioritized over maximum throughput speed. Evaluate the available serial interface modes to ensure compatibility with the host microcontroller's clocking requirements and data transfer constraints.

Part Context

This part belongs to the AD7853 family of high-speed, low-power sampling ADCs. The family includes variants optimized for different performance trade-offs, such as the AD7853L which targets reduced power dissipation. These devices share common architectural features including SAR architecture and integrated track-and-hold circuits designed for efficient signal acquisition.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.