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ADC0803 Dataheets PDF



Part Number ADC0803
Manufacturers National Semiconductor
Logo National Semiconductor
Description 8-Bit uP Compatible A/D Converters
Datasheet ADC0803 DatasheetADC0803 Datasheet (PDF)

ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit µP Compatible A/D Converters November 1999 ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit µP Compatible A/D Converters General Description The ADC0801, ADC0802, ADC0803, ADC0804 and ADC0805 are CMOS 8-bit successive approximation A/D converters that use a differential potentiometric ladder — similar to the 256R products. These converters are designed to allow operation with the NSC800 and INS8080A derivative control bus with TRI-STATE ® output latch.

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ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit µP Compatible A/D Converters November 1999 ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit µP Compatible A/D Converters General Description The ADC0801, ADC0802, ADC0803, ADC0804 and ADC0805 are CMOS 8-bit successive approximation A/D converters that use a differential potentiometric ladder — similar to the 256R products. These converters are designed to allow operation with the NSC800 and INS8080A derivative control bus with TRI-STATE ® output latches directly driving the data bus. These A/Ds appear like memory locations or I/O ports to the microprocessor and no interfacing logic is needed. Differential analog voltage inputs allow increasing the common-mode rejection and 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. n Differential analog voltage inputs n Logic inputs and outputs meet both MOS and TTL voltage level specifications n Works with 2.5V (LM336) voltage reference n On-chip clock generator n 0V to 5V analog input voltage range with single 5V supply n No zero adjust required n 0.3" standard width 20-pin DIP package n 20-pin molded chip carrier or small outline package n Operates ratiometrically or with 5 VDC, 2.5 VDC, or analog span adjusted voltage reference Key Specifications n Resolution n Total error n Conversion time 8 bits Features n Compatible with 8080 µP derivatives — no interfacing logic needed - access time - 135 ns n Easy interface to all microprocessors, or operates “stand alone” ± 1⁄4 LSB, ± 1⁄2 LSB and ± 1 LSB 100 µs Connection Diagram ADC080X Dual-In-Line and Small Outline (SO) Packages DS005671-30 See Ordering Information Ordering Information TEMP RANGE ERROR 0˚C TO 70˚C ADC0802LCWM ADC0804LCWM M20B — Small Outline ADC0804LCN 0˚C TO 70˚C −40˚C TO +85˚C ADC0801LCN ADC0802LCN ADC0803LCN ADC0805LCN/ADC0804LCJ N20A — Molded DIP ± 1⁄4 Bit Adjusted ± 1⁄2 Bit Unadjusted ± 1⁄2 Bit Adjusted ± 1Bit Unadjusted PACKAGE OUTLINE TRI-STATE ® is a registered trademark of National Semiconductor Corp. Z-80 ® is a registered trademark of Zilog Corp. © 1999 National Semiconductor Corporation DS005671 www.national.com ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 Typical Applications DS005671-1 8080 Interface DS005671-31 Error Specification (Includes Full-Scale, Part Number ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 FullScale Adjusted Zero Error, and Non-Linearity) VREF/2 = 2.500 VDC VREF/2 = No Connection (No Adjustments) (No Adjustments) ± 1⁄4 LSB ± 1⁄2 LSB ± 1⁄2 LSB ± 1 LSB ± 1 LSB www.national.com 2 ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) (Note 3) Voltage Logic Control Inputs At Other Input and Outputs Lead Temp. (Soldering, 10 seconds) Dual-In-Line Package (plastic) Dual-In-Line Package (ceramic) Surface Mount Package Vapor Phase (60 seconds) 6.5V −0.3V to +18V −0.3V to (VCC+0.3V) 260˚C 300˚C 215˚C Infrared (15 seconds) Storage Temperature Range Package Dissipation at TA = 25˚C ESD Susceptibility (Note 10) 220˚C −65˚C to +150˚C 875 mW 800V Operating Ratings (Notes 1, 2) Temperature Range ADC0804LCJ ADC0801/02/03/05LCN ADC0804LCN ADC0802/04LCWM Range of VCC TMIN≤TA≤TMAX −40˚C≤TA≤+85˚C −40˚C≤TA≤+85˚C 0˚C≤TA≤+70˚C 0˚C≤TA≤+70˚C 4.5 VDC to 6.3 VDC Electrical Characteristics The following specifications apply for VCC = 5 VDC, TMIN≤TA≤TMAX and fCLK = 640 kHz unless otherwise specified. Parameter ADC0801: Total Adjusted Error (Note 8) ADC0802: Total Unadjusted Error (Note 8) ADC0803: Total Adjusted Error (Note 8) ADC0804: Total Unadjusted Error (Note 8) ADC0805: Total Unadjusted Error (Note 8) VREF/2 Input Resistance (Pin 9) Analog Input Voltage Range DC Common-Mode Error Power Supply Sensitivity Conditions With Full-Scale Adj. (See Section 2.5.2) VREF/2 = 2.500 VDC With Full-Scale Adj. (See Section 2.5.2) VREF/2 = 2.500 VDC VREF/2-No Connection ADC0801/02/03/05 ADC0804 (Note 9) (Note 4) V(+) or V(−) Over Analog Input Voltage Range VCC = 5 VDC ± 10% Over Allowed VIN(+) and VIN(−) Voltage Range (Note 4) 2.5 0.75 Gnd–0.05 8.0 1.1 VCC+0.05 Min Typ Max Units LSB LSB LSB LSB LSB kΩ kΩ VDC LSB LSB ± 1⁄4 ± 1⁄2 ± 1⁄2 ±1 ±1 ± 1/16 ± 1/16 ± 1⁄8 ± 1⁄8 AC Electrical Characteristics The following specifications apply for VCC = 5 VDC and TMIN≤TA≤TMAX unless otherwise specified. Symbol TC TC fCLK CR tW(WR)L tACC t1H, t0H Parameter Conversion Time Conversion Time Clock Frequency Clock Duty Cycle Conversion Rate in Free-Running Mode Width of WR Input (Start Pulse Width) Access Time (Delay from Falling Edge of RD to Output Data Valid) TRI-STATE Control (Delay from Rising Edge of RD to Hi-Z State) tWI, tRI CIN Delay from Falling Edge of WR or RD to Reset of INTR Input Capacitance of Logic Control Inputs.


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