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ADC0803 Datasheet(PDF) 3 Page - Texas Instruments |
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ADC0803 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 7 page ADC0803, ADC0805 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH DIFFERENTIAL INPUTS SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC (see Note 1) 6.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range: CS, RD, WR – 0.3 V to 18 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other inputs – 0.3 V to VCC 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range – 0.3 V to VCC 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range: ADC080_C 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ADC080_I – 40 °C to 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range – 65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTE 1: All voltage values are with respect to digital ground (DGTL GND) with DGTL GND and ANLG GND connected together unless otherwise noted. recommended operating conditions MIN NOM MAX UNIT Supply voltage, VCC 4.5 5 6.3 V Analog input voltage (see Note 2) – 0.05 VCC = 0.05 V Voltage at REF/2 (see Note 3), VREF/2 0.25 2.5 V High-level input voltage at CS, RD, or WR, VIH 2 15 V Low-level input voltage at CS, RD, or WR, VIL 0.8 V Analog ground voltage (see Note 4) – 0.05 0 1 V Clock iput frequency (see Note 5), fclock 100 640 1460 kHz Duty cycle for fclock above 640 kHz (see Note 5) 40% 60% Pulse durartion, clock input (high or low) for fclock below 640 kHz, tW(CLK) 275 781 ns Pulse durartion, WR input low, tW(WR) 100 ns Operating free air temperature TA ADC080_C 0 70 °C Operating free–air temperature, TA ADC080_I –40 85 °C NOTES: 2. When the differential input voltage (VI+ – VI–) is less than or equal to 0 V, the output code is 0000 0000. 3. The internal reference voltage is equal to the voltage applied to REF/2 or approximately equal to one-half of the VCC when REF/2 is left open. The voltage at REF/2 should be one-half the full-scale differential input voltage between the analog inputs. Thus, the differential input voltage range when REF/2 is open and VCC = 5 V is 0 V to 5 V. VREF/2 for an input voltage range from 0.5 V to 3.5 V (full-scale differential voltage of 3 V) is 1.5 V. 4. These values are with respect to DGTL GND. 5. Total unadjusted error is specified only at an fclock of 640 kHz with a duty cycle of 40% to 60% (pulse duration 625 ns to 937 ns). For frequencies above this limit or pulse duration below 625 ns, error may increase. The duty cycle limits should be observed for an fclock greater than 640 kHz. Below 640 kHz, this duty cycle limit can be exceeded provided tw(CLK) remains within limits. |
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