AD7896JRZ-REEL

Overview

The AD7896JRZ-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 accepts a unipolar analog input range of 0 V to VDD, utilizing the supply voltage as the reference. Key electrical parameters include a maximum throughput rate of 100 kHz, a conversion time of 8 µs in high sampling mode, and typical power dissipation of 9 mW. It is housed in an 8-lead SOIC package with a commercial operating temperature range of 0°C to +70°C.

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 without requiring an external voltage reference.
• Features a proprietary automatic power-down mode that activates after conversion to minimize energy consumption.
• Provides a high-speed 2-wire serial interface for straightforward connection to microcontrollers.

Applications

• Battery-powered portable instrumentation
• Industrial process control data acquisition
• Portable medical devices

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm the J version designation corresponds to the required commercial temperature range of 0°C to +70°C for your application environment. Ensure compatibility with the 8-lead SOIC footprint during PCB layout review.

Selection Notes

Select this component for applications requiring a compact, low-power 12-bit resolution with a single-supply operation. Consider the 100 kHz throughput limit and 8 µs conversion time against system speed requirements. Evaluate the need for the auto-sleep power-down feature if battery life is a critical constraint compared to continuous high-speed sampling modes.

Part Context

The AD7896JRZ-REEL belongs to the AD7896 family of fast, 12-bit sampling A/D converters. This series is designed to provide complete data acquisition functionality in minimal space. The JRZ variant specifically denotes the industrial/commercial grade version in a reel format, distinguishing it from PDIP or extended temperature S versions within the same product line.

Replacement Considerations

Direct substitutes include other AD7896 variants such as AD7896ARZ or AD7896ANZ, provided the temperature range and package type meet design specifications. Verify pinout compatibility and electrical parameter alignment before substitution.