Analog Devices AN-291 Application Note Asynchronous Clock Interfacing with the AD7878

About this manual

The document discusses timing constraints for the AD7878, a 12-bit A/D converter with a FIFO memory. It explains that while synchronous clock interfacing is recommended in the data sheet, it is not suitable for every microprocessor and may reduce throughput. An alternative asynchronous method is presented that allows operation at any sampling frequency up to 100 kHz.

What's inside

• Asynchronous Clock Interfacing
• Timing Constraints
• Synchronous vs Asynchronous Operation
• AD7878 FIFO Memory
• Processor Interface Examples
• DMRD Delay Calculation

Specifications

Frequently asked questions

What is the maximum sampling frequency for the AD7878?

The device can operate at any sampling frequency up to the maximum of 100 kHz.

Why use asynchronous interfacing instead of synchronous?

Synchronous interfacing is not suitable for every microprocessor and may reduce throughput depending on the clock frequency.