TC14433ELI Microchip

TC14433/A 3-1/2 Digit, Analog-to-Digital Converter Features: Description Accuracy: 0.05% of Reading 1 Count The TC14433 is a low-power, high-performance, monolithic CMOS 3-1/2 digit A/D converter. The Two Voltage Ranges: 1.999V and 199.9 mV TC14433 combines both analog and digital circuits on Up to 25 Conversions Per Second a single IC, thus minimizing the number of external Z > 1000M Ohms IN components. Single Positive Voltage Reference This dual slope A/D converter provides automatic Auto-Polarity and Auto-Zero polarity and zero correction with the addition of two Overrange and Underrange Signals Available external resistors and two capacitors. The full scale Operates in Auto-Ranging Circuits voltage range of this ratiometric IC extends from 199.9millivolts to 1.999 volts. The TC14433 can Uses On-Chip System Clock or External Clock operate over a wide range of power supply voltages, Wide Supply Range: 4.5V to 8V including batteries and standard 5-volt supplies. The TC14433A features improved performance over Applications: the industry standard TC14433. Rollover, which is the Portable Instruments measurement of identical positive and negative Digital Voltmeters signals, is specified to have the same reading within one count for the TC14433A. Power consumption of Digital Panel Meters the TC14433A is typically 4 mW, approximately one- Digital Scales half that of the industry standard TC14433. Digital Thermometers The TC14433/A is available in 24-Pin PDIP, 24-Pin Remote A/D Sensing Systems SOIC (TC14433 device only), and 28-Pin PLCC packages. Package Type 24-Pin PDIP (Wide) 28-Pin PLCC 24-Pin SOIC (Wide) V V AG 1 24 DD 4 3 2 1 28 27 26 V Q REF 2 23 3 R Q 5 25 1 1 V Q X 3 22 2 R /C 6 24 Q 1 1 0 R Q 4 21 1 1 C DS 7 23 1 1 R /C Q 5 20 1 1 0 TC14433/A NC 8 TC14433/A 22 NC C DS 6 19 1 1 CO DS 9 21 1 2 CO DS 7 18 1 2 CO DS 10 20 2 3 CO DS DU DS 2 8 17 3 11 19 4 DU DS 12 13 14 15 16 17 18 9 16 4 CLK1 OR 10 15 CLK0 EOC 11 14 Note 1: NC = No internal connection (In 28-Pin PLCC). V V 12 13 EE SS 2: 24-Pin SOIC (Wide) package, only for TC14433 device. 2008 Microchip Technology Inc. DS21394D-page 1 CLK1 V X CLK0 V REF V V EE AG NC NC V V SS DD EOC Q 3 OR Q 2TC14433/A Typical Application MCP1525 20 k V +5V V OUT IN 1F V -5V SS +5V +5V +5V 300 k 0.1 F Segment R 0.1 F C 1F Resistors 150 (7) 11 10 2 12 24 1 16 V X 3 23 4 9 7 10 1 22 2 10 6 11 R * 21 3 11 5 12 1 4 20 5 12 4 13 TC14433 5 13 3 14 4543B 6 13 -5V 14 2 15 15 1 16 0.1 F** 1413 8 6 7 7 9 8 14 -5V -5V Minus Sign 15 19 18 17 16 fge d cba 0.1 F** -5V 200 -5V MPS-A12 Plus Sign 6 -5V 5 1 S 110 51 k D Q 3 2 Common Q C R Anode Led +5V 4 Display 8 14013B S 9 13 *R = 470 k for 2V Range 1 D Q 50 F 0.1 F 11 12 Q *R = 27 k for 200 mV Range C 1 R **Mylar Capacitor 710 14 MPS-A12 (4) +5V -5V -5V DS 4 DS 3 DS 2 DS 1 DS21394D-page 2 2008 Microchip Technology Inc.