AD976AAN

Analog To Digital Converters (ADC) Overview

The AD976AAN is a 16-bit, 200 kSPS analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single +5 V supply and features a switched-capacitor successive approximation architecture with an internal 2.5 V reference. The device accepts a bipolar ±10 V analog input range and utilizes a high-speed parallel interface for data output. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 85 dB, Integral Nonlinearity (INL) of ±3 LSB, and Differential Nonlinearity (DNL) of -2/+3 LSB. Maximum power dissipation is 100 mW, and it functions within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a 16-bit switched-capacitor ADC with factory calibration to minimize linearity errors.
• Features a high-speed parallel interface with on-chip clock generation for direct DSP connectivity.
• Operates from a single 5 V supply with low power consumption of 100 mW maximum.
• Includes an internal 2.5 V reference or supports external reference inputs.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring high-resolution signal acquisition.
• Data acquisition modules for scientific instrumentation.
• Audio processing equipment utilizing standard industrial voltage ranges.
• Medical diagnostic devices needing precise analog-to-digital conversion.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific grade (A, B, or C) required for your application, as performance metrics like SNR vary between grades. Confirm package availability, as the AD976AAN is in a 28-lead PDIP package. Check current lifecycle status, as this component may be discontinued or subject to limited supply constraints. Ensure proper ESD handling procedures are followed during installation due to the sensitivity of the CMOS/BiCMOS circuitry.

Analog To Digital Converters (ADC) Selection Notes

Select the AD976AAN when a 200 kSPS throughput rate is necessary, distinguishing it from the slower AD976 variant. Consider the integrated reference and clock features if board space is limited. Evaluate the ±10 V input range compatibility with your sensor signals. Compare the AC accuracy specifications, such as SNR and THD, against system noise requirements. Verify that the parallel interface timing aligns with your microcontroller or DSP capabilities.

Analog To Digital Converters (ADC) Part Context

The AD976AAN belongs to the AD976/AD976A family of BiCMOS A/D converters. This series combines high-performance bipolar devices with CMOS technology. The AD976A represents the faster version of the family, offering double the throughput of the standard AD976. Both variants share similar pinouts and functional blocks, differing primarily in speed and specific AC performance parameters.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements include other parts from the AD976 family, such as the AD976ARZ or AD976ARS, depending on the required package type. For higher speed applications, consider the AD7660AST or AD7664AST families. Ensure any substitute maintains the 16-bit resolution and parallel interface compatibility.