AD7853LAR

Overview

The AD7853LAR is a 12-bit, 200 kSPS sampling analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single 3 V to 5.5 V supply and features a pseudo-differential input range of 0 to VREF. The device includes an internal track-and-hold circuit with a 400 ns acquisition time and supports flexible serial interfaces including SPI, QSPI, Microwire, and 8051 compatibility. Power consumption is typically 6.85 mW at 3 V. It offers system and self-calibration capabilities with automatic power-down after conversion.

Feature Summary

• Integrated self-calibration and system calibration logic for maintaining accuracy over temperature and time
• Flexible serial interface supporting multiple standard protocols and clock configurations
• Automatic power-down mode activated immediately following the completion of a conversion cycle
• Pseudo-differential analog input architecture designed to minimize noise sensitivity

Applications

• Battery-powered portable instrumentation systems
• Medical diagnostic instruments requiring low power consumption
• Industrial process control and data acquisition modules
• Mobile communication equipment and high-speed modems

Procurement Notes

Verify the specific suffix 'AR' indicates the SOIC-24 package variant when sourcing. Confirm the 'L' designation corresponds to the low-power optimized version within the AD7853 family. Ensure the component meets the required operating temperature range specifications for the intended application environment before finalizing procurement.

Selection Notes

Select this model for applications requiring a balance between speed and power efficiency in a single-supply environment. Consider the AD7853 if higher throughput is needed without the low-power constraints, or the AD7853L if extended battery life is the primary design driver. Evaluate the serial interface requirements against the available pin modes.

Part Context

This component belongs to the AD7853/AD7853L family of 12-bit sampling ADCs manufactured by Analog Devices. The family distinguishes between standard speed variants and low-power optimized versions. The AD7853LAR specifically denotes the low-power iteration housed in a 24-lead Small Outline Integrated Circuit (SOIC) package.

Replacement Considerations

Direct functional replacements include the AD7853BR for standard performance or AD7853LBR for low-power operation in the same package. Cross-vendor equivalents require verification of pin compatibility and serial protocol support.