AD7853ARSZ

Overview

The AD7853ARSZ is a 12-bit successive approximation analog-to-digital converter manufactured by Analog Devices Inc. It operates from 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 of 0 V to VREF, with straight binary or two's complement output coding. Power consumption is typically 12 mW at 3 V and includes automatic power-down after conversion. It integrates self-calibration and system calibration capabilities, ensuring accuracy over time and temperature variations.

Feature Summary

• Integrated self-calibration and system calibration mechanisms that maintain operational precision across varying temperatures and timeframes.
• Flexible serial interface architecture compatible with standard protocols including SPI, QSPI, and microprocessor modes.
• Automatic power-down functionality triggered immediately following the completion of each conversion cycle.

Applications

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

Procurement Notes

Verify the specific grade (A or B) and package variant when sourcing, as performance specifications like integral nonlinearity vary between versions. Confirm the operating temperature range requirements against the datasheet limits for the selected grade. Ensure the reference voltage configuration matches the intended application input range before finalizing procurement.

Selection Notes

Select the AD7853ARSZ for applications requiring high-speed sampling up to 200 kSPS with 12-bit resolution in a compact surface-mount package. Consider the AD7853L variant if lower power consumption is prioritized over maximum throughput speed. Verify compatibility with the host microcontroller's serial clock polarity and timing constraints during the design phase.

Part Context

This component belongs to the AD7853 family of single-supply, low-power ADCs. The ARSZ suffix indicates a 24-lead Small Shrink Outline Package (SSOP) variant. It is part of a broader series optimized for portable electronics and industrial data acquisition where power efficiency and moderate speed are critical design parameters.

Replacement Considerations

The AD7853LARSZ serves as the lower-power alternative within the same package footprint. Other members of the AD785x family may offer different resolutions or channel counts but require verification of pinout and register compatibility for direct substitution.