AD976AR

Analog To Digital Converters (ADC) Overview

The AD976AR is a 16-bit, 100 kSPS analog-to-digital converter (ADC) fabricated on Analog Devices' BiCMOS process. It operates from a single +5 V supply and dissipates a maximum of 100 mW. The device features a switched-capacitor successive approximation architecture with an internal 2.5 V reference and high-speed parallel interface. Key electrical specifications include a throughput rate of 100 kSPS, a full-scale input range of ±10 V, and an integral nonlinearity error of ±3 LSB. AC performance metrics include a typical Signal-to-Noise Ratio (SNR) of 83 dB and a Spurious Free Dynamic Range (SFDR) of 90 dB at specified input frequencies.

Analog To Digital Converters (ADC) Feature Summary

• Factory calibrated switched-capacitor SAR architecture minimizes linearity errors without external trimming.
• Integrated 2.5 V voltage reference and on-chip clock reduce external component count.
• High-speed parallel digital interface allows direct connection to microcontrollers and DSPs.
• Single +5 V supply operation simplifies power design for industrial applications.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring high-resolution data acquisition.
• Medical instrumentation and diagnostic equipment.
• Test and measurement instruments such as oscilloscopes and analyzers.
• Automotive electronic control units (ECUs).

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific grade (A, B, or C) required for your application, as performance parameters like SNR vary by grade. Confirm package availability, as the AD976AR is in the SOIC-28 form factor. Check current lifecycle status, as older ADC models may be subject to obsolescence or limited production runs. Ensure ESD precautions are followed during handling due to the sensitivity of the CMOS/BiCMOS inputs.

Analog To Digital Converters (ADC) Selection Notes

Select the AD976AR when a 16-bit resolution and 100 kSPS sampling rate are sufficient for the signal bandwidth. Compare against the AD976A variant if a higher 200 kSPS throughput is needed. Consider the internal reference stability versus external precision references for critical accuracy requirements. Evaluate the ±10 V input range compatibility with sensor outputs to minimize front-end conditioning circuitry.

Analog To Digital Converters (ADC) Part Context

The AD976/AD976A series represents Analog Devices' legacy high-performance 16-bit ADC portfolio. The AD976AR specifically denotes the A-grade version in the 28-lead Small Outline Package (SOIC). This family utilizes proprietary BiCMOS technology to achieve low power consumption while maintaining high linearity and speed, serving as a bridge between general-purpose converters and specialized high-speed data acquisition solutions.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same package are limited due to the age of the part. Verify if newer generations from Analog Devices offer equivalent performance with improved availability. Cross-reference with other 16-bit, 100 kSPS SAR ADCs from different manufacturers if supply chain constraints require alternative sourcing.