AD7876CN

Overview

The AD7876CN is a complete monolithic 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices. It integrates a track-and-hold amplifier, an 8 μs ADC core, and a laser-trimmed internal clock on a single chip. The device operates from ±5 V power supplies and accepts a bipolar analog input voltage range of ±10 V. It supports parallel, byte, and serial digital interfaces with a data access time of 57 ns. Key performance specifications include a signal-to-noise ratio of 72 dB at a 10 kHz input frequency, a maximum sampling rate of 100 kS/s, and typical power dissipation of 60 mW. The component is housed in a 24-pin plastic dual-in-line package.

Feature Summary

• Integrates a track-and-hold amplifier, SAR ADC, and internal reference on a single chip
• Supports parallel, byte, and serial data output formats for flexible microprocessor interfacing
• Features a laser-trimmed internal clock to guarantee accurate conversion timing
• Provides fast bus access times compatible with modern digital signal processors

Applications

• High-speed traditional measurement systems requiring multiplexed channels
• Industrial process control applications
• Motor control systems
• Data acquisition systems

Procurement Notes

Verify the specific suffix against the manufacturer's current ordering guide to confirm package type and temperature grade. Confirm availability status as distribution channels may list obsolete or discontinued stock. Ensure the selected variant matches the required operating temperature range and interface configuration for the target design.

Selection Notes

Select the AD7876CN when a bipolar ±10 V input range is required. Compare dynamic performance specifications such as SNR and THD if high-fidelity signal processing is necessary. Verify that the ±5 V supply requirement aligns with the system power architecture. Consider the 24-pin DIP package constraints for PCB layout and thermal management.

Part Context

The AD7876CN belongs to the AD7870/AD7875/AD7876 family of complete 12-bit sampling ADCs. This series utilizes LC2MOS technology to combine high speed and accuracy. The AD7876 variant is distinguished by its ±10 V input range, whereas the AD7870 offers ±3 V and the AD7875 provides a unipolar 0 V to +5 V range. All variants share similar interface logic and internal reference structures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.