AD7896ARZ-REEL

Overview

The AD7896ARZ-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 100 kS/s with an 8 µs conversion time in high sampling mode. It accepts single-ended analog inputs ranging from 0 V to VDD, utilizing the supply voltage as the reference. The component is housed in an 8-lead SOIC package and delivers a typical signal-to-noise ratio of 70 dB.

Feature Summary

• Integrated 12-bit SAR ADC with on-chip track-and-hold amplifier and internal clock generation
• High-speed 2-wire serial interface compatible with standard microcontrollers and DSP processors
• Automatic power-down mode for low-power applications with rapid wake-up capability
• Single-supply operation using VDD as the internal reference, eliminating external reference requirements

Applications

• Battery-powered portable instrumentation systems
• Industrial data acquisition subsystems requiring compact form factors
• Process control loops with single-ended input signals
• Portable medical devices and handheld measurement tools

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the A-version designation corresponds to the industrial temperature range of -40°C to +85°C. Ensure compatibility with the required serial clock frequency and logic levels before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a complete 12-bit ADC solution in an 8-lead package. It is suitable for applications needing 100 kHz throughput with minimal external components. Consider the auto-sleep mode if power efficiency during idle conversion periods is critical. Verify that the single-ended input range matches the system's signal requirements.

Part Context

The AD7896 belongs to Analog Devices' family of fast, low-power sampling ADCs. The ARZ variant specifically denotes the industrial temperature grade packaged in an 8-lead SOIC. This part integrates functions typically requiring multiple discrete components into a single monolithic chip, simplifying board layout and reducing overall system cost.

Replacement Considerations

Direct replacements within the same family include the AD7896ANZ and AD7896JRZ. Note that the JRZ version has a commercial temperature range (0°C to +70°C), while the ANZ and ARZ versions support the industrial range (-40°C to +85°C). Ensure thermal specifications match the application environment.