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AD7828BR

AD7828BR Description

The AD7828BR from Analog Devices Inc. is an 8-bit, 50kSPS flash analog-to-digital converter (ADC) designed for high-speed, low-power data acquisition systems. Housed in a 28-pin SOIC package, this obsolete but reliable ADC features a parallel data interface and operates on a single 5V supply for both analog and digital domains. With 8 single-ended inputs, it supports a 1:1 sample-and-hold (S/H) to ADC ratio, ensuring accurate signal capture. The device employs a flash architecture, enabling rapid conversion times ideal for real-time applications. Its external reference requirement allows flexibility in voltage scaling, while its surface-mount design suits compact PCB layouts.

AD7828BR Features

• 8-bit resolution with 50k samples per second (SPS) throughput.
• Single 5V supply operation (analog and digital).
• 8-channel single-ended input multiplexer for multi-signal acquisition.
• Parallel interface for straightforward microcontroller/processor integration.
• Flash conversion architecture for minimal latency (<1µs).
• External reference voltage support for adjustable input ranges.
• Surface-mount 28-SOIC package (MSL 1 – unlimited shelf life).
• Low power consumption, suitable for portable/battery-operated systems.

Advantages over similar models: The AD7828BR’s flash architecture provides faster conversion compared to successive-approximation (SAR) ADCs, while its 8-channel input multiplexer reduces external component count in multi-sensor systems.

AD7828BR Applications

• Industrial control systems: High-speed monitoring of sensors (temperature, pressure).
• Medical instrumentation: Portable diagnostic equipment requiring low-power ADCs.
• Automotive systems: Real-time data logging for engine/vehicle diagnostics.
• Consumer electronics: Video processing, audio digitization.
• Legacy equipment repairs: Direct replacement for obsolete 8-bit ADCs in legacy designs.

Conclusion of AD7828BR

The AD7828BR is a robust, albeit obsolete, 8-bit flash ADC offering speed, simplicity, and multi-channel capability. Its 5V operation and parallel interface make it compatible with older microcontrollers, while its 8-input multiplexer reduces system complexity. Though newer higher-resolution ADCs exist, the AD7828BR remains a pragmatic choice for cost-sensitive, high-speed applications where 8-bit precision suffices. Engineers maintaining legacy systems or designing low-power, real-time monitoring solutions will find it a dependable option.