443-1122

ADC8809 Zenith Part Number: 443-1122Generic Industry Standard: ADC0809 (often manufactured by National Semiconductor or Texas Instruments)Component Type: 8-Bit Analog-to-Digital Converter (ADC) with an 8-channel multiplexer.Technical SpecificationsThis legacy integrated circuit was widely utilized in 1980s electronics—including Zenith television chassis, computing modules, and Heathkit educational training systems—to convert analog control voltages into digital data.Resolution: 8-bit successive approximation register (SAR) conversion.Input Channels: 8 analog inputs routed through an internal multiplexer.Logic Level: Standard TTL-compatible inputs and outputs.Package Style: Standard 28-pin Dual In-line Package (DIP).Total Unadjusted Error: \(\pm \frac{1}{2}\) LSB or ±1 LSB depending on the exact chip grade.Conversion Time: Roughly 100 microseconds at a standard 640 kHz clock frequency. USED