AD7876BN

Overview

The AD7876BN is a monolithic 12-bit successive approximation analog-to-digital converter (ADC) from the AD7870/AD7875/AD7876 family. It integrates a track-and-hold amplifier, an 8 μs ADC core, and a laser-trimmed internal clock. The device operates on ±5 V power supplies and accepts a bipolar analog input range of ±10 V. It features parallel, byte, and serial digital interfaces with a typical data access time of 57 ns. Key electrical specifications include a maximum conversion time of 9 μs using the internal clock, a typical power dissipation of 60 mW, and a signal-to-noise ratio of 72 dB at +25°C. The component is housed in a 24-pin dual-in-line package.

Feature Summary

• Integrates a complete 12-bit ADC with a 2 μs track-and-hold amplifier and a self-contained internal clock.
• Offers versatile digital interface options including parallel, byte, and serial data output formats.
• Features an on-chip temperature-compensated buried Zener reference providing a stable 3 V output.
• Designed for fast microprocessor interfacing with standard control inputs and rapid bus access times.

Applications

• Data acquisition systems requiring high-speed sampling
• Digital signal processing applications
• Industrial process control instrumentation

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm the exact temperature grade and package variant. Ensure that the selected part matches the required operating conditions and pinout configuration for your design. Cross-reference the datasheet revision to confirm current specifications before finalizing procurement.

Selection Notes

Select this component when a single-ended ±10 V input range is required alongside 12-bit resolution. Compare performance against the AD7870 for ±3 V inputs or the AD7875 for unipolar ranges. Consider the available interface modes and power consumption requirements relative to other members of the AD787x series.

Part Context

This component belongs to the AD7870/AD7875/AD7876 family of LC2MOS complete 12-bit sampling ADCs. While sharing the same core architecture and pinout, variants differ primarily in analog input voltage ranges and temperature grades. The AD7876 specifically targets bipolar ±10 V applications within this lineup.

Replacement Considerations

The AD7876BRZ is a surface-mount equivalent in the SOIC-24 package. For hermetic ceramic DIP packages, the AD7876BQ serves as a compatible alternative. Verify pin compatibility and thermal characteristics when substituting these parts.