AD7853LARS-REEL

Overview

The AD7853LARS-REEL is a low-power, 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 3 V to 5.5 V supply and delivers a throughput rate of 100 kSPS. The device features a pseudo-differential input range of 0 V to VREF and supports both straight binary and two's complement output coding. Power consumption is optimized at 4.5 mW in normal mode and 1.15 mW in power-down mode. It includes system and self-calibration capabilities with autocalibration on power-up. The component is housed in a 24-lead SSOP package.

Feature Summary

• Low power optimization for battery-powered applications
• Integrated track-and-hold circuitry with pseudo-differential sampling
• Flexible serial interface compatible with standard protocols
• Automatic calibration logic for maintaining accuracy

Applications

• Battery-powered personal digital assistants
• Medical instruments
• Mobile communications systems
• Pen computers
• Instrumentation and control systems

Procurement Notes

Verify the specific ordering suffix 'REEL' indicates tape and reel packaging when sourcing components. Confirm that the L variant meets the required 100 kSPS speed specification rather than the higher speed AD7853 model. Ensure the SSOP package dimensions align with the target PCB footprint requirements.

Selection Notes

Select this component when low power consumption is prioritized over maximum conversion speed. The AD7853L offers reduced power dissipation compared to the standard AD7853 while maintaining 12-bit resolution. Consider the 100 kSPS throughput limit and verify compatibility with the system clock frequency requirements for the intended application environment.

Part Context

This part belongs to the AD7853 family of high-speed, low-power ADCs. The AD7853L variant is specifically engineered for lower power operation compared to the standard AD7853. Both share identical pinouts and functional architectures but differ in performance optimization targets regarding speed versus energy efficiency.

Replacement Considerations

The AD7853 serves as the higher-speed counterpart within the same family. Verify if the increased 200 kSPS throughput of the AD7853 is necessary or if the lower power profile of the AD7853L is sufficient for the design constraints.