AD7853LAR-REEL

Overview

The AD7853LAR-REEL is a 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single 3 V to 5.5 V supply and delivers a throughput rate of 100 kSPS. The device features a track-and-hold circuit with a 400 ns acquisition time and supports pseudo-differential input ranges of 0 to VREF or -VREF/2 to +VREF/2. Power consumption is typically 6.85 mW in normal mode at 3 V, dropping to 1.15 mW in power-down mode. It includes system and self-calibration capabilities with autocalibration on power-up. The component utilizes a flexible serial interface compatible with SPI, QSPI, and microprocessor standards, housed in a 24-lead SSOP package.

Feature Summary

• Low power operation optimized for battery-powered applications
• Integrated system and self-calibration with automatic power-up calibration
• Flexible serial interface supporting multiple communication protocols
• Pseudo-differential sampling scheme with wide analog input range

Applications

• Battery-powered personal digital assistants and mobile communications
• Medical instruments requiring low power consumption
• Pen computers and portable instrumentation systems
• High-speed modem data acquisition

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure compatibility with existing board layouts regarding the 24-lead SSOP footprint. Confirm that the 100 kSPS throughput meets system timing requirements. Check for any recent product change notices affecting pinout or electrical specifications before finalizing procurement.

Selection Notes

Select this model when a balance between moderate speed and low power consumption is required. The AD7853L variant is specifically optimized for lower power dissipation compared to the standard AD7853. Consider the integrated calibration features if high accuracy over temperature variations is critical without external calibration hardware. Verify that the serial interface modes align with the host controller's capabilities.

Part Context

This component belongs to the AD7853 family of 12-bit sampling ADCs designed for single-supply operation. The 'L' designation indicates the low-power version optimized for extended battery life. The 'AR' suffix specifies the SOIC package, while 'LAR' denotes the SSOP package variant. This family is engineered for applications demanding precision in compact, portable form factors.

Replacement Considerations

Direct replacements within the same family include the AD7853AN, AD7853BN, AD7853LAN, and AD7853LBN. These variants share identical functional characteristics but differ in package types (DIP vs. SSOP/SOIC) and linearity error grades. Ensure the substitute part matches the required package style and operating temperature range.