AD977ABN

Analog To Digital Converters (ADC) Overview

The AD977ABN is a monolithic, high-speed 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a sampling rate of 40 MSPS and utilizes a successive approximation register (SAR) architecture to achieve low power consumption. The device operates from a single +5V supply and includes an internal reference voltage source. It is housed in a 20-lead plastic DIP package with a width of 0.300 inches. Key electrical specifications include a full-scale input range of ±10V, a maximum conversion time of 4 µs, and a differential nonlinearity (DNL) error of ±1 LSB. The component supports serial access for data output and control.

Analog To Digital Converters (ADC) Feature Summary

• Integrated internal reference voltage eliminates the need for external precision references.
• Single +5V supply operation simplifies power distribution in embedded systems.
• Serial interface capability reduces microcontroller pin count and board space requirements.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring isolated signal acquisition.
• Portable instrumentation where low power consumption is critical.
• Data acquisition modules for environmental monitoring sensors.

Analog To Digital Converters (ADC) Procurement Notes

Verify the manufacturer date code and lot traceability upon receipt. Confirm that the component matches the specified 20-lead PDIP package dimensions. Check for physical damage to pins and ensure the marking on the top surface corresponds exactly to the AD977ABN part number to avoid counterfeit substitution.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a moderate speed of 40 MSPS is sufficient for the application bandwidth. Consider the ±10V input range if signal conditioning amplifiers are not desired. Ensure the system can accommodate the serial communication timing requirements. Evaluate thermal dissipation capabilities within the enclosed DIP package for continuous operation at elevated ambient temperatures.

Analog To Digital Converters (ADC) Part Context

The AD977ABN belongs to the broader AD977 family of high-speed ADCs from Analog Devices. It shares architectural similarities with other members like the AD977AN but differs in resolution and package options. This specific variant targets cost-sensitive applications needing 12-bit accuracy without the complexity of parallel interfaces found in higher-performance models.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements may include other 12-bit SAR ADCs from Analog Devices such as the AD977AN, provided the package style and pinout match. Verify that alternative components support the same ±10V input range and 40 MSPS sampling rate before substituting.