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AD7880BR

AD7880BR Description

The AD7880BR from Analog Devices Inc. is a 12-bit, 66 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) designed for precision data acquisition systems. Housed in a 24-pin SOIC package, this obsolete but historically significant device operates on a 5V analog/digital supply and supports parallel data interface for high-speed communication. It features two single-ended inputs with a 1:1 sample-and-hold (S/H) to ADC ratio, ensuring accurate signal capture. The ADC relies on an external reference voltage derived from the supply, offering flexibility in system design. Its SAR architecture delivers low-latency conversions, making it suitable for real-time applications.

AD7880BR Features

• 12-bit resolution with 66 kSPS sampling rate for high-precision measurements.
• Parallel data interface for direct integration with microprocessors or FPGAs.
• Single-ended dual-input configuration, simplifying multiplexed signal acquisition.
• 5V single-supply operation (analog and digital), reducing power complexity.
• External reference capability, enabling adjustable dynamic range.
• Surface-mount (SOIC) packaging with MSL 3 (168-hour floor life), suited for automated assembly.
• SAR architecture ensures deterministic latency and fast response.

AD7880BR Applications

The AD7880BR excels in systems requiring medium-speed, high-accuracy conversions, such as:

• Industrial automation: Process control, sensor interfaces, and PLCs.
• Medical instrumentation: Portable diagnostic equipment with low-power demands.
• Test and measurement: Data loggers and oscilloscopes needing parallel output.
• Legacy system upgrades: Replacement for older 12-bit ADCs in military/aerospace (ECCN EAR99 compliant).

Conclusion of AD7880BR

Though obsolete, the AD7880BR remains a benchmark for 12-bit SAR ADCs, offering a balance of speed, precision, and simplicity. Its parallel interface and single-supply operation make it ideal for embedded designs requiring deterministic performance. While newer models may offer higher integration, the AD7880BR's robust architecture and flexible reference design ensure relevance in legacy and cost-sensitive applications. Engineers seeking a proven solution for medium-bandwidth signal chains may still find value in its specifications.