ADC0809: 8-Bit Analog-to-Digital Converter (ADC) | National Semiconductor

The ADC0809 is an 8-bit analog-to-digital converter (ADC) integrated circuit (IC) from National Semiconductor (now part of Texas Instruments). It converts analog voltage signals into digital output values, which are then sent to a microcontroller or digital signal processor (DSP) for further processing. The ADC0809 has a single-ended input with a maximum conversion rate of 100 kilosamples per second (ksps), a 256:1 multiplexer, and an on-chip clock generator. It is commonly used in applications such as temperature sensing, audio signal processing, and industrial control systems.