ADC0809

ADC0808-N, ADC0809-N www.ti.com SNAS535H – OCTOBER 1999 – REVISED MARCH 2013 ADC0808/ADC0809 8-Bit μP Compatible A/D Converters with 8-Channel Multiplexer Check for Samples: ADC0808-N, ADC0809-N FEATURES 1 2 Easy Interface to All Microprocessors Operates Ratiometrically or with 5 VDC or Analog Span Adjusted Voltage Reference No Zero or Full-Scale Adjust Required 8-Channel Multiplexer with Address Logic 0V to VCC Input Range Outputs meet TTL Voltage Level Specifications ADC0808 Equivalent to MM74C949 ADC0809 Equivalent to MM74C949-1 KEY SPECIFICATIONS Resolution: 8 Bits Total Unadjusted Error: ±½ LSB and ±1 LSB Single Supply: 5 VDC Low Power: 15 mW Conversion Time: 100 μs DESCRIPTION The ADC0808, ADC0809 data acquisition component is a monolithic CMOS device with an 8-bit analog-todigital converter, 8-channel multiplexer and microprocessor compatible control logic. The 8-bit A/D converter uses successive approximation as the conversion technique. The converter features a high impedance chopper stabilized comparator, a 256R voltage divider with analog switch tree and a successive approximation register. The 8-channel multiplexer can directly access any of 8-single-ended analog signals. The device eliminates the need for external zero and full-scale adjustments. Easy interfacing to microprocessors is provided by the latched and decoded multiplexer address inputs and latched TTL TRI-STATE outputs. The design of the ADC0808, ADC0809 has been optimized...