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ADC0805 Arkusz danych(PDF) 1 Page - Texas Instruments |
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ADC0805 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 7 page ADC0803, ADC0805 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH DIFFERENTIAL INPUTS SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 8-Bit Resolution D Ratiometric Conversion D 100-µs Conversion Time D 135-ns Access Time D Guaranteed Monotonicity D High Reference Ladder Impedance 8 k Ω Typical D No Zero Adjust Requirement D On-Chip Clock Generator D Single 5-V Power Supply D Operates With Microprocessor or as Stand-Alone D Designed to Be interchangeable With National Semiconductor and Signetics ADC0803 and ADC0805 description The ADC0803 and ADC0805 are CMOS 8-bit, successive-approximation, analog-to-digital converters that use a modified potentiometric (256R) ladder. These devices are designed to operate from common microprocessor control buses with the 3-state output latches driving the data bus. The devices can be made to appear to the microprocessor as a memory location or an I/O port. Detailed information on interfacing to most popular microprocessors is readily available from the factory. A differential analog voltage input allows increased common-mode rejection and offset of the zero-input analog voltage value. Although a reference input (REF/2) is available to allow 8-bit conversion over smaller analog voltage spans or to make use of an external reference, ratiometric conversion is possible with the REF/2 input open. Without an external reference, the conversion takes place over a span from VCC to ANLG GND. The devices can operate with an external clock signal or with an additional resistor and capacitor, using an on-chip clock generator. The ADC0803C and ADC0805C are characterized for operation from 0 °C to 70°C. The ADC0803I and ADC0805I are characterized for operation from – 40 °C to 85°C. Copyright © 1986, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 CS RD WR CLK IN INTR IN + IN – ANLG GND REF/2 DGTL GND VCC (OR REF) CLK OUT DB0 (LSB) DB1 DB2 DB3 DB4 DB5 DB6 DB7 (MSB) N PACKAGE (TOP VIEW) DATA OUTPUTS |
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