AD7896AR-REEL

Overview

The AD7896AR-REEL is a 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.5 V supply and features an on-chip track-and-hold amplifier, internal clock, and high-speed serial interface. The device supports a throughput rate of up to 100 kS/s with an 8 µs conversion time in high sampling mode. It utilizes the VDD input as the reference voltage, eliminating the need for external references. The component is housed in an 8-lead SOIC package and consumes approximately 9 mW typical power.

Feature Summary

• Integrates a 12-bit SAR ADC, track-and-hold amplifier, and serial interface logic within an 8-lead package.
• Operates from a single 2.7 V to 5.5 V supply using VDD as the internal reference.
• Features a proprietary automatic power-down mode that activates after conversion completion.

Applications

• Battery-powered portable instrumentation
• Industrial data acquisition systems
• Process control applications

Procurement Notes

Verify the specific suffix 'REEL' indicates tape and reel packaging when sourcing components. Confirm the 'A' version designation corresponds to the industrial temperature range of -40°C to +85°C. Ensure compatibility with the 8-lead SOIC footprint during PCB layout. Cross-reference the manufacturer's latest datasheet revision for any updates to absolute maximum ratings or timing characteristics before finalizing procurement orders.

Selection Notes

Select this component for applications requiring a compact, low-power 12-bit ADC solution. The integrated track-and-hold amplifier simplifies front-end design by handling input signals directly. Consider the 100 kHz throughput limit when designing system timing. The use of VDD as the reference requires stable supply voltage conditions to maintain accuracy. Evaluate the serial interface requirements against available microcontroller resources.

Part Context

The AD7896 belongs to a family of fast, 12-bit sampling ADCs designed for space-constrained environments. It combines multiple functions typically found in larger assemblies into a small 8-lead package. The device is suitable for systems where power consumption and board area are critical constraints. It offers a balance between speed and resolution for general-purpose data conversion tasks.

Replacement Considerations

Direct replacements include other variants within the AD7896 family such as the AD7896ANZ or AD7896JRZ, depending on required package type and temperature range specifications.