전자부품 데이터시트 검색엔진 |
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TC14433EPG 데이터시트(PDF) 6 Page - TelCom Semiconductor, Inc |
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TC14433EPG 데이터시트(HTML) 6 Page - TelCom Semiconductor, Inc |
6 / 10 page 3-132 TELCOM SEMICONDUCTOR, INC. Segment 3 — This segment of the conversion cycle is the same as Segment 1. Segment 4 — Segment 4 is an up-going ramp cycle with the unknown input voltage (VX) as the input to the integrator. Figure 8 shows the equivalent configuration of the analog section of the TC14433. The actual configuration of the analog section is dependent upon the polarity of the input voltage during the previous conversion cycle. Segment 5 — This segment is a down-going ramp period with the reference voltage as the input to the integra- tor. Segment 5 of the conversion cycle has a time equal to the number of counts stored in the offset storage latches during Segment 2. As a result, the system zeros automati- cally. Segment 6 — This is an extension of Segment 5. The time period for this portion is 4000 clock periods. The results of the A/D conversion cycle are determined in this portion of the conversion cycle. Figure 10. 3-1/2 Digit Voltmeter Common-Anode Displays, Flashing Overrange 3 1 4 5 6 7 8 23 22 21 20 13 9 14 15 19 18 17 16 11 10 2 12 24 4 2 3 5 9 10 11 12 13 14 15 1 7 6 5 4 3 2 1 10 11 12 13 14 15 16 0.1 µF** R1* 0.1 µF R C Vx 20K 1 2 3 D C S R TC14433 Q Q D C S R +5V –5V 16 +5V +5V SEGMENT RESISTORS 150 (7) Ω +5V Q Q 50 µF 0.1 µF –5V –5V –5V –5V 8 MINUS SIGN 200 Ω PLUS SIGN 110 Ω 51k 67 +5V –5V –5V –5V MPS-A12 (4) COMMON ANODE LED DISPLAY MPS-A12 300k 0.1 0.1 µF 14013B 5 3 9 11 1 2 13 12 6 714 10 *R 1 R 1 = 470k FOR 2V RANGE Ω **MYLAR CAPACITOR = 27k FOR 200mV RANGE Ω fgedcba +5V 0.1 µF 0.1 µF 4 8 DS 4 DS 3 DS 2 DS 1 –5V TC04 4543B 1413 Figure 9. Alternate Oscillator Circuits (B) LC Oscillator Circuit 10 L C 11 C TC14433 TC14433 CLK1 11 10 18M 47k (A) Crystal Oscillator Circuit 10 pF < C AND C < 200 pF 1 2 FOR L = 5 mH AND C = 0.01 µF, f 32 kHz ≅ C 1 f = 1 2 2/LC CLK0 CLK1 CLK0 C 2 3-1/2 DIGIT A/D CONVERTERS TC14433 TC14433A |
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