AD7896BN

Overview

The AD7896BN is a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) housed in an 8-lead SOIC package. It operates from a single 2.7 V to 5.5 V supply, consuming 9 mW typical power. The device integrates an on-chip track-and-hold amplifier and generates its own clock. It supports a maximum throughput rate of 100 kHz with an 8 µs conversion time. The analog input range spans from 0 V to VDD, utilizing the supply voltage as the internal reference. Data is accessed via a high-speed serial interface requiring SCLK and SDATA lines.

Feature Summary

• Integrates a 12-bit SAR ADC, track-and-hold amplifier, and clock oscillator within an 8-lead package.
• Operates from a single 2.7 V to 5.5 V supply with the supply voltage serving as the internal reference.
• Features a high-speed serial interface for easy connection to microcontrollers and DSP processors.
• Includes an automatic power-down mode that activates after conversion completion to minimize energy usage.

Applications

• Battery-powered portable instrumentation systems
• Industrial process control data acquisition
• Portable medical devices requiring low power consumption

Procurement Notes

Verify the specific suffix 'BN' against official Analog Devices documentation to confirm temperature grade and package variant. Standard commercial versions typically carry suffixes like AR or AN. Ensure the source document explicitly lists the BN designation to avoid ordering errors due to unverified suffix interpretations.

Selection Notes

Select this component when a compact 12-bit ADC solution is required with minimal external components. The integrated reference eliminates the need for external voltage references. Consider the 100 kHz throughput limit and 8 µs conversion speed for system timing requirements. Verify that the single-ended input range matches the application signal levels.

Part Context

The AD7896 series provides a complete data acquisition solution in a small footprint. It combines analog front-end functions with digital conversion logic. The family includes variants optimized for different temperature ranges and packaging styles. This specific model represents the standard industrial or commercial offering depending on the verified suffix classification.

Replacement Considerations

Direct replacements include other AD7896 variants such as AD7896ARZ or AD7896ANZ, provided the temperature range and package type match the design requirements. Cross-reference pinouts and electrical specifications to ensure compatibility.