AD7896AN

Overview

The AD7896AN is a 12-bit successive approximation register (SAR) analog-to-digital converter 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 uses the VDD input as the reference voltage, eliminating the need for external references. It supports a throughput rate of 100 kHz with an 8 µs conversion time in high-speed mode. The serial interface utilizes SCLK and SDATA lines, providing straight binary output coding.

Feature Summary

• Integrates a 12-bit SAR ADC, track-and-hold amplifier, and clock oscillator within an 8-lead package.
• Features a high-speed two-wire serial interface compatible with standard microcontrollers.
• Operates from a single supply where VDD serves as both power source and internal reference.
• Includes automatic power-down mode that activates after conversion completion.

Applications

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

Procurement Notes

Verify the specific suffix 'AN' against manufacturer documentation to confirm package type and temperature range. Ensure the ordering information matches the required industrial or commercial grade specifications. Confirm RoHS compliance status through official datasheets before procurement.

Selection Notes

Select this component when a compact 12-bit resolution is required with minimal external circuitry. The integrated reference simplifies design by removing the need for separate voltage references. Consider the 100 kHz throughput limit and serial interface timing constraints during system architecture planning.

Part Context

The AD7896 belongs to Analog Devices' family of fast, low-power sampling ADCs. It is designed to replace discrete solutions by combining multiple functions into a single small footprint. The part is suitable for applications prioritizing space efficiency and low energy consumption over ultra-high speed performance.

Replacement Considerations

Direct replacements include other variants within the AD7896 series such as AD7896ARZ or AD7896JRZ, depending on the required operating temperature range and packaging preference. Verify pin compatibility and electrical specifications before substitution.