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ADC0804 Datasheet(PDF) 1 Page - Renesas Technology Corp |
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ADC0804 Datasheet(HTML) 1 Page - Renesas Technology Corp |
1 / 17 page FN3094 Rev 4.00 Page 1 of 17 August 2002 FN3094 Rev 4.00 August 2002 ADC0803, ADC0804 8-Bit, Microprocessor-Compatible, A/D Converters DATASHEET The ADC080X family are CMOS 8-Bit, successive-approximation A/D converters which use a modified potentiometric ladder and are designed to operate with the 8080A control bus via three-state outputs. These converters appear to the processor as memory locations or I/O ports, and hence no interfacing logic is required. The differential analog voltage input has good common- mode-rejection and permits offsetting the analog zero-input- voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution. Typical Application Schematic Features • 80C48 and 80C80/85 Bus Compatible - No Interfacing Logic Required • Conversion Time . . . . . . . . . . . . . . . . . . . . . . . . . . <100 s • Easy Interface to Most Microprocessors • Will Operate in a “Stand Alone” Mode • Differential Analog Voltage Inputs • Works with Bandgap Voltage References • TTL Compatible Inputs and Outputs • On-Chip Clock Generator • Analog Voltage Input Range (Single + 5V Supply) . . . . . . . . . . . . . . . . . . . . . . 0V to 5V • No Zero-Adjust Required • 80C48 and 80C80/85 Bus Compatible - No Interfacing Logic Required Pinout ADC0803, ADC0804 (PDIP) TOP VIEW 3 2 1 12 11 5 15 14 13 18 17 16 7 6 10 9 8 4 19 20 WR RD CS DB6 DB7 INTR DB3 DB4 DB5 DB0 DB1 DB2 CLK IN CLK R V+ VIN (-) VIN (+) DGND VREF/2 AGND ANY PROCESSOR 8-BIT RESOLUTION OVER ANY DESIRED ANALOG INPUT VOLTAGE RANGE DIFF INPUTS 10K 150pF VREF/2 +5V 11 12 13 14 15 16 17 18 20 19 10 9 8 7 6 5 4 3 2 1 WR RD CS CLK IN INTR VIN (-) VIN (+) DGND VREF/2 AGND V+ OR VREF CLK R DB0 (LSB) DB1 DB2 DB3 DB4 DB5 DB6 DB7 (MSB) Ordering Information PART NUMBER ERROR EXTERNAL CONDITIONS TEMP. RANGE (oC) PACKAGE PKG. NO ADC0803LCN 1 /2 LSB VREF/2 Adjusted for Correct Full Scale Reading 0 to 70 20 Ld PDIP E20.3 ADC0804LCN 1 LSB VREF/2 = 2.500VDC (No Adjustments) 0 to 70 20 Ld PDIP E20.3 |
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