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TC14433 Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC14433 Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc |
1 / 10 page 3-127 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 TC14433 TC14433A 3-1/2 DIGIT A/D CONVERTERS APPLICATIONS s Portable Instruments s Digital Voltmeters s Digital Panel Meters s Digital Scales s Digital Thermometers s Remote A/D Sensing Systems s MPU Systems s See Application Notes 19 and 21 TC14433/A-6 10/21/96 FEATURES s Accuracy ................... ±0.05% of Reading ±1 Count s Two Voltage Ranges ............. 1.999V and 199.9 mV s Up to 25 Conversions Per Second s ZIN > 1000M Ohms s Single Positive Voltage Reference s Auto-Polarity and Auto-Zero s Overrange and Underrange Signals Available s Operates in Auto-Ranging Circuits s Uses On-Chip System Clock or External Clock s Wide Supply Range .................... e.g., ±4.5V to ±8V s Package Available .................................. 24-Pin DIP 24-Pin CerDIP, 28-Pin SOIC and 28-Pin PLCC GENERAL DESCRIPTION The TC14433 is a low power, high-performance, mono- lithic CMOS 3-1/2 digit A/D converter. The TC14433 com- bines both analog and digital circuits on a single IC, thus minimizing the number of external components. This dual- slope A/D converter provides automatic polarity and zero correction with the addition of two external resistors and two capacitors. The full-scale voltage range of this ratiometric IC extends from 199.9 millivolts to 1.999 volts. The TC14433 can operate over a wide range of power supply voltages, including batteries and standard 5-volt supplies. The TC14433 will interface with the TC7211A LCD display driver. The TC14433A features improved performance over the industry standard TC14433. Rollover, which is the measurement of identical positive and negative signals, is guaranteed to have the same reading within one count for the TC14433A. Power consumption of the TC14433A is typically 4 mW, approximately one-half that of the industry standard TC14433. ORDERING INFORMATION Part No. Package Temp.Range TC14433AEJG 24-Pin CerDIP – 40 °C to +85°C TC14433AELI 28-Pin PLCC – 40 °C to +85°C TC14433AEPG 24-Pin Plastic DIP – 40 °C to +85°C TC14433COG 24-Pin SOIC 0 °C to +70°C TC14433EJG 24-Pin CerDIP – 40 °C to +85°C TC14433ELI 28-Pin PLCC – 40 °C to +85°C TC14433EPG 24-Pin Plastic DIP – 40 °C to +85°C FUNCTIONAL BLOCK DIAGRAM LATCHES 1'S 10'S 100'S 1,000'S CLOCK RC CONTROL LOGIC CMOS ANALOG SUBSYSTEM DISPLAY UPDATE 9 DU END OF CONVERSION EOC R1 C1 / 14 R1 C1 45 6 CO 1 CO2 78 2 1 3 VREF VAG VX REFERENCE VOLTAGE ANALOG GROUND ANALOG INPUT VDD VSS VEE = PIN 24 = PIN 13 = PIN 12 OFFSET POLARITY DETECT 10 CLK1 11 CLK0 OR OVERRANGE MULTIPLEXER 20–23 16–19 DS DIGIT STROBE 1 –DS4 Q BCD DATA 0 –Q3 INTEGRATOR 15 OVERFLOW |
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