AD7876BR

Overview

The AD7876BR is a complete monolithic 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features an internal track-and-hold amplifier with a maximum acquisition time of 2 μs and a successive approximation ADC core with a conversion time of 8 μs. The device operates from ±5 V power supplies and accepts a bipolar analog input voltage range of ±10 V. It integrates a laser-trimmed 3 V buried Zener reference and offers versatile digital interface options, including parallel, byte, and serial modes. Key performance specifications include a signal-to-noise ratio of 72 dB at a 10 kHz input frequency and a typical power dissipation of 60 mW.

Feature Summary

• Integrates a high-speed track-and-hold amplifier and a 12-bit successive approximation ADC on a single chip.
• Features a factory-trimmed internal 3 V buried Zener reference requiring no external components for basic operation.
• Supports flexible data output formats through parallel, byte, and serial interface configurations.
• Includes an on-chip laser-trimmed clock oscillator that ensures accurate conversion timing without external timing components.

Applications

• Data acquisition systems requiring 12-bit resolution and fast throughput rates.
• Industrial process control applications utilizing bipolar signal inputs.
• Digital signal processing interfaces compatible with standard microprocessors.

Procurement Notes

Verify the specific suffix designation to confirm the package type and temperature rating, as the base model number may correspond to multiple variants. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the ordering code matches the required input voltage range and interface configuration before procurement.

Selection Notes

Select the AD7876BR when a bipolar ±10 V input range is required, distinguishing it from the unipolar AD7875 or the lower-range AD7870. Consider the available interface modes if system bus architecture dictates parallel or serial data transfer. Verify that the ±5 V supply rails are available in the target design environment.

Part Context

The AD7876BR belongs to the AD7870/AD7875/AD7876 family of 12-bit sampling ADCs from Analog Devices. This series provides complete conversion solutions with integrated references and clocks. The BR suffix typically denotes the SOIC-24 surface-mount package variant within this product line.

Replacement Considerations

Public confirmed substitute part numbers: AD7876CRZ, AD7876BNZ.